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One of the world’s biggest cities may be just months away from running out of water

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Photo Courtesy: Henry Romero/Reuter

Mexico City CNN —  Alejandro Gomez has been without proper running water for more than three months. Sometimes it comes on for an hour or two, but only a small trickle, barely enough to fill a couple of buckets. Then nothing for many days.

Gomez, who lives in Mexico City’s Tlalpan district, doesn’t have a big storage tank so can’t get water truck deliveries — there’s simply nowhere to store it. Instead, he and his family eke out what they can buy and store.

When they wash themselves, they capture the runoff to flush the toilet. It’s hard, he told CNN. “We need water, it’s essential for everything.”

Water shortages are not uncommon in this neighborhood, but this time feels different, Gomez said. “Right now, we are getting this hot weather. It’s even worse, things are more complicated.”

Mexico City, a sprawling metropolis of nearly 22 million people and one of the world’s biggest cities, is facing a severe water crisis as a tangle of problems — including geography, chaotic urban development, and leaky infrastructure — are compounded by the impacts of climate change.

Years of abnormally low rainfall, longer dry periods, and high temperatures have added stress to a water system already straining to cope with increased demand. Authorities have been forced to introduce significant restrictions on the water pumped from reservoirs.

“Several neighborhoods have suffered from a lack of water for weeks, and there are still four months left for the rains to start,” said Christian Domínguez Sarmiento, an atmospheric scientist at the National Autonomous University of Mexico (UNAM).

Politicians are downplaying any sense of crisis, but some experts say the situation has now reached such critical levels that Mexico City could be barreling towards “day zero” in a matter of months — where the taps run dry for huge swaths of the city.

Historic lows

Densely populated Mexico City stretches out across a high-altitude lake bed, around 7,300 feet above sea level. It was built on clay-rich soil — into which it is now sinking — and is prone to earthquakes and highly vulnerable to climate change. It’s perhaps one of the last places anyone would choose to build a megacity today.

The Aztecs chose this spot to build their city of Tenochtitlan in 1325, when it was a series of lakes. They built on an island, expanding the city outwards, constructing networks of canals and bridges to work with the water.

But when the Spanish arrived in the early 16th century, they tore down much of the city, drained the lakebed, filled in canals and ripped out forests. They saw “water as an enemy to overcome for the city to thrive,” said Jose Alfredo Ramirez, an architect and co-director of Groundlab, a design and policy research organization.

Photo Courtesy : Cesar Rodriguez/Bloomberg/Getty Images

Their decision paved the way for many of Mexico City’s modern problems. Wetlands and rivers have been replaced with concrete and asphalt. In the rainy season, it floods. In the dry season, it’s parched.

Around 60% of Mexico City’s water comes from its underground aquifer, but this has been so over-extracted that the city is sinking at a frightening rate — around 20 inches a year, according to recent research. And the aquifer is not being replenished anywhere near fast enough. The rainwater rolls off the city’s hard, impermeable surfaces, rather than sinking into the ground.

The rest of the city’s water is pumped vast distances uphill from sources outside the city, in an incredibly inefficient process, during which around 40% of the water is lost through leaks.

The Cutzamala water system, a network of reservoirs, pumping stations, canals and tunnels, supplies about 25% of the water used by the Valley of Mexico, which includes Mexico City. But severe drought has taken its toll. Currently, at around 39% of capacity, it’s been languishing at a historic low.

“It’s almost half of the amount of water that we should have,” said Fabiola Sosa-Rodríguez, head of economic growth and environment at the Metropolitan Autonomous University in Mexico City.

In October, Conagua, the country’s national water commission, announced it would restrict water from Cutzamala by 8% “to ensure the supply of drinking water to the population given the severe drought.”

Just a few weeks later, officials significantly tightened restrictions, reducing the water supplied by the system by nearly 25%, blaming extreme weather conditions.

“Measures will have to be taken to be able to distribute the water that Cutzamala has over time, to ensure that it does not run out,” Germán Arturo Martínez Santoyo, the director general of Conagua, said in a statement at the time.

The exposed banks of the Villa Victoria Dam, part of the Cutzamala System, in Villa Victoria, Mexico on January 26, 2024.

Photo Courtesy :Raquel Cunha/Reuters

Around 60% of Mexico is experiencing moderate to exceptional drought, according to a February report. Nearly 90% of Mexico City is in severe drought — and it’s set to get worse with the start of the rainy season still months away.

“We are around the middle of the dry season with sustained temperature increases expected until April or May,” said June Garcia-Becerra, an assistant professor in engineering at the University of Northern British Columbia.

Natural climate variability heavily affects this part of Mexico. Three years of La Niña brought drought to the region, and then the arrival of El Niño last year helped deliver a painfully short rainy season that failed to replenish the reservoirs.

But the long-term trend of human-caused global warming hums in the background, fueling longer droughts and fiercer heat waves, as well as heavier rains when they do arrive.

“Climate change has made droughts increasingly severe due to the lack of water,” said UNAM’s Sarmiento. Added to this, high temperatures “have caused the water that is available in the Cutzamala system to evaporate,” she said.

Last summer saw brutal heat waves roil large parts of the country, which claimed at least 200 lives. These heat waves would have been “virtually impossible” without climate change, according to an analysis by scientists.

The climate impacts have collided with the growing pains of a fast-expanding city. As the population booms, experts say the centralized water system has not kept pace.

‘Day zero?’

The crisis has set up a fierce debate about whether the city will reach a “day zero,” where the Cutzamala system falls to such low levels that it will be unable to provide any water to the city’s residents.

Local media widely reported in early February that an official from a branch of Conagua said that without significant rain, “day zero” could arrive as early as June 26.

But authorities have since sought to assure residents there will be no day zero. In a press conference on February 14, Mexican President Andrés Manuel López Obrador said that work was underway to address the water problems. Mexico City’s mayor, Martí Batres Guadarrama, said in a recent press conference that reports of day zero were “fake news” spread by political opponents.

Conagua declined CNN’s interview requests and did not answer specific questions on the prospect of a day zero.

But many experts warn of a spiraling crisis. Mexico City could run out of water before the rainy season arrives if it carries on using it in the same way, Sosa-Rodríguez said. “It’s probable that we will face a day zero,” she added.

This doesn’t mean a complete collapse of the water system, she said, because the city isn’t dependent on just one source. It won’t be the same as when Cape Town in South Africa came perilously close to running totally dry in 2018 following a severe multi-year drought. “Some groups will still have water,” she said, “but most of the people won’t.”

Raúl Rodríguez Márquez, president of the non-profit Water Advisory Council, said he doesn’t believe the city will reach a day zero this year — but, he warned, it will if changes are not made.

“We are in a critical situation, and we could reach an extreme situation in the next few months,” he told CNN.

‘I don’t think anyone is prepared’

For nearly a decade, Sosa-Rodríguez said she has been warning officials of the danger of a day zero for Mexico City.

She said the solutions are clear: Better wastewater treatment would both increase water availability and decrease pollution, while rainwater harvesting systems could capture and treat the rain, and allow residents to reduce their reliance on the water network or water trucks by 30%.

Fixing leaks would make the system much more efficient and reduce the volume of water that has to be extracted from the aquifer. And nature-based solutions, such as restoring rivers and wetlands, would help provide and purify water, she said, with the added advantage of greening and cooling the city.

In a statement on its website, Conagua said it is undertaking a 3-year project to install, develop and improve water infrastructure to help the city cope with decreases in the Cutzamala system, including adding new wells and commissioning water treatment plants.

But in the meantime, tensions are rising as some residents are forced to cope with shortages, while others — often in the wealthier enclaves — remain mostly unaffected.

“There is a clear unequal access to water in the city and this is related to people’s income,” Sosa-Rodríguez said. While day zero might not be here yet for the whole of Mexico City, some neighborhoods have been grappling with it for years, she added.

Photo Courtesy : Henry Romero/Reuters

Amanda Martínez, another resident of the city’s Tlalpan district, said for people here, water shortages are nothing new. She and her family often have to pay more than $100 for a tank of water from one of the city’s water trucks. But it’s getting worse. Sometimes more than two weeks can go by without water and she fears what may be coming, she told CNN.

“I don’t think anyone is prepared.”

Neerain is proud to republish this blog for spreading awareness about situation of water, for our stake holders. Credit whatsoever goes to the Author.

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CNN

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Author : Laura Paddison, Jack Guy and Fidel Gutiérrez

Published On: 25, February, 2024

 

Rainwater harvesting a lifeline for 900 families

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Photo Courtesy : The Hindu

UDAIPUR: Capturing rainwater is the most sustainable solution to deal with water scarcity in Rajasthan and specially when the technique is the traditional wisdom of the desert state.
According to Central Ground Water Board (CGWB), out of 243 blocks in Rajasthan, 196 fall in the critical zone. This means that in these regions, the annual withdrawal of water from underground is more than what falls as rain. There is growing imbalance between demand and supply of water in the state.

As per international standards, availability of water below 500 cubic meter is considered as absolute water scarcity. The annual per capita availability of water in the state is expected to go down to 439 m3 by 2050 which was 840 m3 in 2001 and against the national average of 1,140 m3 by 2050. Wells for India, (WI) a UK-based NGO which have been working for three decades for the water cause, has helped people to deal with water scarcity through rainwater capturing techniques. WI with its partner GRAVIS, another NGO helped construction and repair of 895 taankas in Pabupura cluster in the Phalodi block of Jodhpur district which has ensured water security to 900 families. These Taankas have of 21,000 litre capacity.

Now 900 families have water source at their doorstep for a period varying from 9 to 12 months. “The intervention has helped women in saving time, money and labour. Their working hours have reduced from 18 to 15 hours and now they can relax for around nine hours a day as compared six hours in the past. The increased water availability for a longer duration has reduced physical workload, mental stress and health related problems of women,” says OP Sharma, country director, WI.

Photo Courtesy : engineering and architecture

Tanka beneficiaries started to take bath and wash clothes more frequently. The water use in washing clothes and taking bath has increased by more than 4 times, whereas the water used by animals has increased by 2.5 times. Moreover, daily cleaning of utensils and water storage pots has substantially increased. Above 70% of the tanka families have started using alum/chlorine tablets to purify their drinking water, whereas more than 80% of the families have started using ladle to take water from the pot. Last but not least, expenditure incurred on water for drinking and domestic purpose including the water for animals reduced from 2 to 3 times.

Similarly in Hilly regions of Bhinder block of Udaipur seen the significant impacton increase in irrigated area on account of mainly ground water / well rechargedue to construction of small water harvesting works such as loose stone checkdams, masonry dams etc. Prior to construction of these structures the totalirrigated area under the command of these 39 existing wells (i.e in 2004) was only 23 hectare, which has now been (up to Rabi 2016 ) increased to 80 hectare. Irrigated area is showing the significant impact of these small water harvesting works on increasing the availability of water.

NeeRain is proud to republish this blog to spread awareness about the situation of water, for our stakeholders. Credit whatsoever goes to the Author.

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Times Of India

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Author : Times Of India

Published On : 22 Mar, 2017

India’s man-made water crisis threatens more cities

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Photo Courtesy : Ador T. Bustamante/Gulf News

Chennai water crisis isn’t an isolated case. 21 cities are expected to run out of water

  • 200,000 Indians die every year because they don’t have a safe water supply.
  • In theory, India receives enough rain every year to meet the needs of over a billion people.
  • A rapidly urbanizing and developing India needs to drought-proof its cities and rationalize its farming.

One of India’s largest cities, Chennai, is dealing with a crippling crisis: It has run out of water. In the middle of a particularly hot summer, the four lakes that supply the capital of the southern state of Tamil Nadu have dried up; together they contain just 1 per cent of the volume they did last year. Residents don’t have enough water to drink, bathe or wash clothes. People are working from home; malls have closed their bathrooms; and restaurants have shut their doors.

The natural instinct is to blame the situation on climate change and, indeed, the last monsoon’s rains were especially weak. While that’s certainly played a role, however, Chennai’s is largely a man-made disaster — one that more Indian metropolises are soon to suffer no matter the weather.

According to a study by the federal government think tank Niti Aayog, 21 Indian cities will run out of groundwater by next year, including the capital New Delhi and the information technology hub of Bengaluru. Two hundred thousand Indians already die every year because they don’t have a safe water supply, the report said. A shocking 600 million people face “high to extreme” water stress.

As the world warms, the rains on which India depends have become erratic: They frequently fail to arrive on time, and they fall in a more disparate and unpredictable pattern.

– Mihir Sharma

That Chennai should have run dry first is instructive. Less than four years ago, the now drought-ridden city was inundated by devastating floods. Though located on a flood plain, the city had paved over the lakes and wetlands that might have helped the process of recharging the water table. As a result, heavy rains couldn’t percolate into aquifers under the city. Water pooled and surged aboveground. That reduced the resources available to deal with a crisis like this year’s.

Photo Courtesy  : istock

Elsewhere, demand is the issue. In theory, India receives enough rain every year to meet the needs of over a billion people. According to the country’s Central Water Commission, it requires at most 3,000 billion cubic metres of water annually and receives 4,000 billion cubic metres of rain.

Inefficiency and misuse

But too much water is wasted thanks to inefficiency and misuse. The situation is particularly dire in India’s northwest, irrigated by the great rivers that rise in the Himalayas. Indians are taught to revere the “green revolution” of the 1970s, when the northwest became India’s granary thanks to canals and tube wells that pumped out groundwater. That revolution, however, has turned out to be unsustainable. In 2011, 245 billion cubic metres of water was withdrawn for irrigation — a quarter of the total groundwater depletion globally that year.

Northwestern states should be growing less water-intensive crops; areas in the east of the country that receive much more plentiful rainfall should take their place as the bread baskets of India. But shifting cultivation patterns around is politically problematic. Farmers in the northwest don’t just expect to continue to grow water-intensive crops, they also want free or subsidised power with which to run the tube wells that pump out their rapidly depleting groundwater.

limate change activists have long argued that water will be the political flashpoint of the 21st century. Water-stressed India will likely be one of the first places to test that theory. The state of Tamil Nadu complains that it doesn’t receive its fair share of the waters of the Cauvery River; recently, the authority that nominally manages the river accused the government of neighbouring Karnataka of holding onto water that it should have allowed to flow down to the Cauvery delta.

Things might get even testier up north, where more than a billion people depend upon rivers that rise in the Himalayas. Bangladesh and Pakistan feel that India is being stingy with river water. Indian strategists constantly worry that China will divert water from the Himalayan rivers that rise in Tibet to feed the thirst cities in its own north.

The floods in Chennai are a warning. As the world warms, the rains on which India depends have become erratic: They frequently fail to arrive on time, and they fall in a more disparate and unpredictable pattern. The country can no longer afford to waste its dwindling resources.

A rapidly urbanising and developing India needs to drought-proof its cities and rationalise its farming. Water-harvesting must be a priority, alongside mechanisms for groundwater replenishment. As it is, every summer is hotter and less bearable. If Indians run short of water as well, one of the world’s most populous nations could well become unlivable.

NeeRain is proud to republish this blog to spread awareness about the situation of water, for our stakeholders. Credit whatsoever goes to the Author.

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Bloomberg

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Author : Mihir Sharma

Published On : 19 June, 2019

 

A world without water: Scary future lies ahead

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We are living in water-stressed times; there are water-haves and a rising tide of water have-nots.

Photo Courtesy : Deccan Chronicle

In his 2015 sci-fi thriller, The Water Knife, set in Phoenix, Arizona, sometimein the near, dystopian future, novelist Paolo aacigalupi talks about placesthat are catastrophically water-starved, where suburbs have morphed intoghost towns and where people are fleeing drought. A riveting character in the book called Angel is a “water knife”, tasked to infiltrate and sabotage the water supplies of competing states.

I read excerpts of the book. It is racy, graphic, and terrifying, and not in the realm of the implausible anymore. We are living in water-stressed times; there are water-haves and a rising tide of water have-nots. A friend who lives in Gurgaon recently tweeted that in upscale condominiums in his city, there is free, unmetered, unlimited water for residents and one can actually leave a tap running and go off for a week with no charge and minimal consequences.

Meanwhile, the residents of Chennai, India’s sixth largest city, are livingthrough horrific times, though it rained a little earlier this week. Chennai has basically almost run out of water. The city is almost entirely dependent on the northeast monsoon, which starts in October. Last year, it received very little rainfall. Even thousands of kilometers away from Chennai, it is hard to insulate oneself against its troubles. All the four reservoirs that supply Chennai its water are running dry this summer because of scant rainfall in 2018.

Chennai’s water crisis is front-page news; friends’ Facebook posts describe in grim detail what is it is like to go without enough water day after day. There are images and video clips of long queues of people around water tankers in searing heat; there have been reports of scuffles over water. Many of Chennai’s hotels are rationing water for guests, and some private companies have reportedly asked their staff to work from home.

This week, the state government has announced that a train will bring water to Chennai from Jolarpettai in Vellore district, more than 200 km, away at a huge cost. The Opposition DMK leadership is against the idea. In short, more troubles lie ahead.

Chennai makes the headlines because it is a metropolitan city. But it is by no means the only place suffering acute water stress. Nearly half the country is grappling with drought-like conditions, and this has been particularly bad this year in western and southern India because of the below-average rainfall.

The question that interests me most about Chennai is how did it get to this sorry state? Tamil Nadu was perhaps the first state in India to make rainwater harvesting (RWH) mandatory for all buildings in 2003. Chennai has more than eight lakh RWH structures. So why are so many people in that city facing such an acute water shortage?

There hangs a tale which explains just about every mess that you see in nurban India. A building with a rainwater harvesting system on paper does not mean it actually works. A bit like the existence of a toilet does not mean it is used.

It will not work if it is not maintained properly. Friends in Chennai tell me there is huge apathy among a lot of people towards maintaining these structures. The water crisis had never been this acute. Many of the rainwater harvesting structures in Chennai are also inefficient.

If Chennai and so many other cities are facing a water crisis today, one bigreason is that neither policymakers nor many people living in these places truly realise the horrors of running out of water. If it starts raining anytime soon, people will forget their recent sufferings. That’s why the inefficiencies in the water sector remain, and rainwater storage and reuse and treatment of greywater are not given the importance that they deserve.

Here is one scandalous statistic about water losses. Lack of proper maintenance of infrastructure causes losses of almost 40 per cent of piped water in urban India.

Photo Courtesy : Quizlet

Chennai is currently in the news, but the big picture regarding water in India is grim. The Niti Aayog, the government’s think tank, acknowledges that nearly 600 million people in the country face high-to extreme water stress. There is a deepening national groundwater crisis, with 54 per cent of wells declining in level due to unsustainable withdrawals for irrigation.

The Narendra Modi government’s new Jal Shakti (water) ministry has announced a grand plan to provide piped water connections to every household in India by 2024. But the key question remains — what will happen if there is no water to give?

What will it take to realise that time is running out and we have to also wake up to simple ideas about conserving water. India captures only eight per cent of its annual rainfall. This is among the lowest in the world. Our ancestors used to capture far more. But those traditional methods have been neglected to the point where most are in ruins. We also don’t use our wastewater well.

There is much talk about security. It is time to realise that water is a security issue. Millions of Indians are not water-secure. Fights are breaking out over water. In Madhya Pradesh, the state government has reportedly asked the police in all its 52 districts to guard water sources. An existential threat hovers over many prosperous pockets of India. A drought is a huge part of the problem. The situation is getting steadily worse with unregulated extraction of groundwater, which is depleting underground aquifers. Take Bengaluru. Whoever has money drills a borewell to tap groundwater in the newer suburban areas where tech companies are clustered in the city.

A few years ago, I remember meeting a young hip technocrat who told me that “l fear the day when I will have soap all over my face and there is not a drop of water coming out of the tap”.

But I also saw a fascinating initiative called the Participatory Aquifer Mapping Project, which sought to involve Bengaluru’s residents in sharing information about borewells in their communities so that the city’s policymakers could learn what was happening underground and begin to craft a suitable response.

Today, in this country, demand for water vastly outstrips supply; the situation can deteriorate sharply unless we realise that this is an emergency and we must treat water as a precious resource and everyone must work towards conserving it.

The future could well resemble dystopian fiction.

NeeRain is proud to republish this blog to spread awareness about the situation of water, for our stakeholders. Credit whatsoever goes to the Author.

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Deccan Chronicle

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Author : Patralekha Chatterjee

Published On: 28, June, 2019

Rainwater Harvesting: A Viable Means To Prevent Water Crisis

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Photo courtesy:Istock

“Water, water, every where, / Nor any drop to drink”

These all too familiar lines from the poem by Samuel Taylor Coleridge seem to be ringing too close to home as water becomes an increasingly scarce resource with every passing day.

Water Crisis was ranked as the #5 Global Risk in terms of impact on society by the World Economic Forum in January 2020, making it an alarming issue requiring an earnest redressal. What is interesting is that it is not really about scarcity, but rather proper water management. To quote the World Water Council, “There is a water crisis today. But the crisis is not about having too little water to satisfy our needs. The crisis is managing water so badly that billions of people — and the environment — suffer badly.”1

For sustainability, a healthy relationship between natural cycles and the available natural resources is a must. To further this objective and protect the existing reservoirs, rivers, aquifers, and ecosystems from further destruction, one needs to harness the largest and most accessible resource currently going down the drain: Rain.

What is noteworthy is that harnessing rain neither requires no energy nor any natural resource; on the contrary, it helps preserve the much-needed fast depleting resource: Water.

Rainwater harvesting is an ancient concept that is simple to implement and scalable. Simply put, it is the act of collecting rainwater and storing it for later use.

Rainwater harvesting systems have many an avatar, from the basic rain barrels to collect rainwater to more intricate structures with pumps, tanks, and purification systems.

Rainwater collected through any system is fit for reuse. Without filtration and purification, it finds use in most functions minus consumption — e.g., flushing toilets, washing cars, irrigation etc. Once put through the purification process, it is fit for consumption as well.

In urban areas, the rain falls on roofs, buildings, roads, and other impenetrable hard surfaces, resulting in urban flooding giving rise to another set of challenges. This makes rainwater harvesting even more essential and advantageous. Urban flooding on one hand, and increasing water shortage on the other, is the driving force behind government norms to inculcate the culture of rainwater harvesting in more and more cities.

Let us take the case of Mexico City as an example. It is a city with one of the highest demands for water in the world. Today it is plagued by drying aquifers, the city to sink to the earth by 50 centimeters per year. Today it is estimated that while a large volume is lost every way on account of leaking water pipes across the water management system, heavy rains cause heavy flooding that leaves substantial damage behind every occurrence.2 Researchers confirm that if the city was to adopt an effective rainwater harvesting system, 60 percent of the city’s water needs could be met.3 In light of this, Isla Urbana, a local non-profit, has installed 20,399 rainwater harvesting systems from 2009 to date. The systems have recorded a harvest of 815 million liters annually.4 Mexico City’s water authority, SACMEX, has also installed rainwater harvesting systems in 85 schools in the Tlalpan and Alvaro Obregón boroughs.

Likewise, India — a country that can collect up to 1,000 liters of water or even more during the heavy monsoons — has shown a similar response. In the southern state of Kerala, the government has recently constructed around 87,000 rainwater harvesting pits across schools, offices, and residences,5 with the expectation of these pits to last up to five years, with minimum maintenance.

Following the trend, Singapore installed a rainwater harvesting system on the roof of a 15-story skyscraper. The system diverts the rainwater collected on the roof to two rainwater tanks. This water is supplied to the building’s toilets, with no processing or treatment — a demonstration of how a project like this can be successfully implemented in metropolitan cities such as New York with countless high-rises to cater to their equally high water demands (981 million gallons consumption per day, as of 20206).

But New York is hardly a city to miss out on the ongoing trends. NYC’s Department of Environmental Protection recently initiated a Rain Barrel Giveaway Program as part of their $2.4 billion Green Infrastructure Plan. Its objective is to encourage citizens to capture stormwater before it flows into the sewer system. The intention being to reduce sewer overflows into local waterways by 2030.

 

Photo courtesy:India Mart

The world is slowly but surely waking up to the fact that rainwater harvesting systems need to be an essential part of the infrastructure. Irrespective of the intricacies, all rainwater harvesting systems require five fundamental components:

Catchment – The surface to collect rainwater. It could be a rooftop, a paved flooring surface, or a landscaped region. The volume of water you harvest is a function of the surface area of the catchment.

Gutters and conduit Pipes – They are responsible for directing the water to the storage tank. The most widely used materials for these are half-round pipes made of galvanized iron (GI), steel, aluminum, and uPVC, with GI, steel, and aluminum being the preferred options. Lead and other metal gutters (GI and steel) are not a wise choice for potable water systems. The slightly acidic quality of rain can dissolve lead and other heavy metal contained in gutter solders, contaminating the water supply.

The safest option to get the most usable rainwater is uPVC Pipes. They deliver faithfully on the promise of:

  • water with no harmful metals lacing it;
  • no leakages on account of corrosion over the years;
  • their almost frictionless surface allows for the maximum quantity of water to flow to the storage system;
  • their lighter weight allows for installation virtually anywhere.

Filters and first flush devices – Investing in the correct filtration device is a must. The filtration system should be one that can effectively remove harmful and polluting contaminants. A first flush valve flushes out the first spell of rain, which carries relatively more toxins from the catchment surface and air.

Storage tanks – An important component of the system. Depending on the space availability, they can be overhead, underground, or stacked. Common materials used for these tanks are poly, galvanized steel, and concrete. If the tank is above ground, measures to prevent algae growth will be needed.

Delivery systems – Piping systems that deliver the stored and filtered rainwater until the point of use. The material of pipes used for this purpose is the same as that of conduit pipes. uPVC pipes present the best option to deliver quality water consistently over the years. With 50+ years of life, no rust, no

corrosion, no heavy metals, and an almost frictionless surface, they offer a perfect solution. High-quality uPVC pipes assure you of a leak-free, durable, and minimal maintenance delivery system.

While building a rainwater harvesting system or incorporating it in a facility, it is crucial to be careful while choosing the components for the solution. It is crucial to pick the right materials. The choice at this stage will define the efficacy of the solution and yield the desired results. Rainwater harvesting, if done right, can help the world tide over the water crisis, allowing us to leave a more beautiful world for your future generations.

Neerain is proud to republish this article for spreading awareness about situation of water, for our stakeholders. Credit whatsoever goes to the Author.

This article is published by: –

Water Online

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Author :  Saumya Jain
Published On: June 29, 2021

Rain Water Harvesting- Solution to India’s Water crisis

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Photo courtesy:Indiamart

India is facing the worst water crisis in its history. As per a report by Niti Ayog 21 cities in India will run out of groundwater by 2020. According to a report published by WaterAid around 80% of India’s surface water is polluted. A majority of the population is dependent on the groundwater which is again struggling to keep pace with the needs of the rising population.  While around 200,000 people are dying each year due to inadequate access to safe water, the situation will likely get worse as the population will increase.

While cities are grappling for water supply, there is an urgent need for improved measures to manage water resources. Water conservation and management are becoming a worldwide concern due to the accelerating water shortages, rapid development, population growth and growing agriculture. In such a situation, rainwater harvesting is a viable solution to help meet this demand and solve the water crisis to some extent.

A major population heavily depend on the municipality supplied water for daily household use. This growing reliance put an unnecessary burden on the infrastructure. Rain-water harvesting can save gallons of water for daily household or office use. For every 1000 sq feet of roof space, approximately 620 gallons of water can be saved every time it rains. This source of non-potable water can be used in flushing toilets, laundry etc. The saved water can fulfil at least 70% of the water demand in a household of 3 people during a drought year. If saved for months, this water can also be used for irrigation and fulfil the water requirement of crops in a drought-like situation. Further, if used with drip irrigation, more water can be saved and dependence on municipal water supplies can be reduced to a great extent.

Photo courtesy: Indiamart

Rainwater harvesting has been adopted by many countries as a viable means to save water. With the increasing population and dependence on water, it becomes pertinent for households to start investing in rain-water harvesting systems (RWH). Govt, both at the centre and state must take a proactive step towards making it mandatory for buildings and complexes to install Rainwater Harvesting System. A huge penalty should be imposed upon building without a proper urban water management system. Considering the huge water problem, monitoring and strict action against violation of the rules are equally important to deal with the crisis.

Water conservation also lies in the hands of Corporates and individuals. Corporate consciousness towards water and individual empathy can make a huge difference. With government mandating the socio good paradigm, the corporates now equally have the onus to implement low water usage methods and social welfare policies, aimed at water management and harvesting rainwater. Corporates within their capacity can design CSR initiatives concentrating on water conservation, rain-water harvesting and spread water awareness in the most interior parts of the country.

In order to save the country from the water crisis, social consciousness has to be practised at all levels. People have to come forward and realize their responsibility towards water and make sure we take proactive measures to ensure its effective management.

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Published On:  September 7, 2019

India’s clock is ticking: Water Crisis

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Photo courtesy:Deposit

With 139 crore population, water scarcity in India is on the rise. More than 50% of the population does not have access to safe drinking water and about 2,00,000 people die every year due to either water scarcity or because of diseases caused due to drinking unhygienic water. India is currently facing the biggest water crisis. As of June 2019, 65% of the country’s reservoirs were running dry.

In India, more than 600 million people are facing acute water scarcity. About three-quarter of households do not have a drinking water facility. Currently, India ranks 120th among 122 countries in the water quality index. By 2030, India’s water demand is expected to be double that of supply that implies not only water scarcity in India for numerous people but also a loss of around 6 per cent to GDP. This underscores the need for strategic interventions to promote water use efficiency, both at the micro and macro level.

You may not know it, or feel it yet, but every aspect of our society and economy is impacted by this worsening situation. In fact, the National Institution for Transforming India (NITI Aayog) described it as “the worst water crisis” in India’s history.

Photo courtesy:Istock

Many rural communities who are situated on the outskirts of urban sprawl also have little choice but to drill wells to access groundwater sources due to water scarcity in India. However, any water system adds to the overall depletion of water. There is no easy answer for water scarcity in India which must tap into water sources for food and human sustenance, but India’s overall water availability is running dry.

India needs solutions now. Children in 100 million homes in the country lack water and one out of every two children are malnourished. Environmental justice needs to be restored to India so that families can raise their children with dignity, and providing water to communities is one such way to best ensure that chance.

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Author:   NITIN SHARAM

Published On:  17/03/2021

The water of 37 out of 38 districts of Bihar is not fit for drinking, the government admitted.

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Earlier in Bihar, arsenic, fluoride and iron were confirmed in groundwater in 28 districts, but now the Deputy Chief Minister admitted that the water in 37 districts was no longer fit for drinking.

In Dhamdaha village of Purnia district of Bihar, yellowness is visible near the hand pump due to excess of iron. Whereas this hand pump has been installed by the government to provide iron free water. Photo: Pushya Mitra

Deputy Chief Minister of Bihar Sushil Kumar Modi has informed in one of his speeches that the water of 37 out of 38 districts of Bihar is not fit for drinking. These include contamination with fluoride, arsenic and iron. Despite all the efforts of the government, supply of quality drinking water in 31 thousand wards of the state still remains a challenge. He was addressing the 52nd annual conference of the Indian Water Works Association in the auditorium of NIT Patna on Sunday. This admission of Deputy Chief Minister Modi shows that a large population of the state is still in serious danger due to consuming infected drinking water. With this, the scope of infection has increased, because till just a few years ago only 28 districts of the state were under the scope of drinking water contamination.

Earlier there was infection in 28 districts

However, information is still available on the site of the state Public Health Engineering Department based on the 2009 groundwater quality status report only. Information has been given there that 13 districts of the state are affected by excess of arsenic, 11 fluoride and 9 iron. In some of these districts, there are two types of infections, thus the number of groundwater infected districts is said to be 28. Similarly, there is information about iron contamination in the water of 18673 tolas, fluoride contamination in the water of 4157 tolas and arsenic contamination in the water of 1590 tolas. In this way, groundwater of a total of 24,420 hamlets is reported to be infected.

According to the 2009 report, all the districts situated on the banks of Ganga in the state are under the influence of arsenic contamination. All the districts of South Bihar are fluoride infected and nine districts of East Bihar are at risk of iron infection. Some districts of North-West Bihar were till now said to be free from groundwater contamination. But according to new information, they too may have been infected with iron or arsenic. Yesterday the Deputy Chief Minister informed about the contamination of water in 31 thousand wards of 37 districts of the state.

Infection increased in 6,580 hamlets of nine districts

If this information is considered correct, then in the last ten years the infection has spread in the groundwater of 9 districts and 6,580 hamlets. Continuous efforts were made to get information in this regard from the department officials, but they were not available. According to a report available on the department’s site, the target is to provide pure drinking water in these tolas by March 2020. But how much this can be achieved remains to be seen.

Risk of cancer, fluorosis and gas related diseases

The number of cancer patients is continuously increasing in Bihar due to arsenic contamination in groundwater. It is believed that one in every ten thousand people in an arsenic contaminated area is at risk of becoming a victim of cancer. The number of gall bladder cancer patients has increased rapidly in the last few years in Bihar, and arsenic is being considered a major reason behind this. Last year, a joint research by India and UK revealed that wheat grown in arsenic contaminated areas also poses a risk of cancer.

Similarly, fluorosis patients are seen in abundance in many fluoride infected villages of South Bihar. Their bones start becoming crooked. Gas and related diseases are prevalent in iron infected areas.

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Author:  Pushya Mitra

Publish On: 13 January 2020

Pune’s Water Crisis: Legal Notices Issued To PMC, PCMCPMRDA; Petitioners Threaten Contempt Petition In High Court

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The bench had gone into the details of the PIL and took note of the grave situation of water scarcity stated in the PIL in context to the urban areas of Pune district. The Bombay high court had taken note of the above information and had directed that a special committee be constituted separately for PMC and PCMC. And such committees shall attend to the complaints of the residents regarding water scarcity. The PMRDA was also directed to address the water problems faced by the residents coming under their jurisdiction.

Pune, 23rd November 2023: the PIL 126/2023 regarding water problem faced by the residents of urban areas of Pune district was last heard by the division bench headed by acting chief justice SV GANGAPURWALA and justice Sandeep Marne at Bombay high court on 10.04.2023.

The committee is to consist of 1) municipal commissioner 2) divisional commissioner 3) chief city engineer 4) member, secretary, district legal services authority. The committee therefore is to consist of people who are involved in the redressal of the water problem faced by the residents of the affected areas.

Where is the special committee? – citizens ask! Contempt of court petition to be filed.

Satya muley – advocate Bombay high court, stated that a notice was sent to the PMC, PCMC and PMRDA in the month of June 2023 requesting for information about formation of such a special committee. However, none of them responded by giving any information about the formation of the committee. Therefore, it is apparent that PMC, PCMC and PMRDA have not formed any such special committee. Therefore, a fresh legal notice has been issued on 22.11.2023 to PMC, PCMC and PMRDA. If we do not receive the information about formation of the special committee, then a contempt of court petition will be filed against all the respective office bearers who are supposed to be the members of the proposed committee.

PMC, PCMC & PMRDA not serious about water problems of the citizens.

In a similar PIL during 2016-17 the Bombay high court had directed the PMC to form a special committee to attend to the complaints of the residents regarding the water scarcity problem. Adv. Satya muley points PMC had formed such a committee in the past, but the committee met only for 4 times during 2017 and 2018, and very surprisingly was dissolved stating the reason that there was no water scarcity problem. He also pointed out that had such a committee been functional, today the grave situation of water scarcity would not have arisen in urban areas of Pune district. Earlier during the hearing of November 29, 2022, and December 15, 2022, the Bombay high court had expressed serious concerns about the issue and also had warned for imposing fine on the respondents for their slow response.

Water scarcity-current scenario

Several housing societies across Pune district are facing severe water shortages and spend huge amounts for purchase of water from private water tanker operators. Each and every neigh Bourhood of urban area of Pune district coming under PMC, PCMC and PMRDA are facing acute water shortage of drinking and domestic use water. As per ministry of housing and urban affairs, 135 Litres per capita per day (LPCD) has been suggested as the benchmark for urban water supply. The situation is so bad that in several areas of Pune residents are not getting even 20 litres of water supply per head per day. Baner- Balewadi, Wagholi, Hinjawadi, Bavdhan, Pashan, Pimpri Chinchwad, Wakad, Mudhwa and many regions of Pune district are facing severe water crunch, and the urban areas are now under the strong grip of private water tanker mafia. As per one estimate the housing societies in Pune district are spending over 300 to 400 crores per month to purchase daily need water from private water tanker operators. Does this figure provide the reason behind the artificial water scarcity in Pune district? People are forced to spend money for water in urban areas of Pune district.

STOP GIVING PERMISSIONS FOR NEW CONSTRUCTIONS

Speaking on behalf of the petitioners, adv Satya muley said, “water is a basic necessity of life, and the current state of water supply situation in urban areas of entire Pune district is pathetic. The PMC, PCMCPMRDA and the Pune Zilla parishad should stop giving permissions for new constructions if they are not able to provide water to the existing residents of Pune district. When a problem is existing and known, then in such a case these authorities do not have right to make the problem bigger. Before giving any fresh permission to any new construction, these authorities must attack and solve the water Scarcity problem on war footing. People are losing their patience if the special committee does not start functioning in next couple of weeks, a contempt petition to prosecute all the authorities shall be filed at Bombay high court. Supply of fresh potable water is a constitutional responsibility of all the local bodies under article 243w of the constitution of India and under the s 63 (20) of Maharashtra municipal corporations act. Article 21 of the constitution of India guarantees right to life, and water means life!”

Heavy dependence on ground water

Pune’s heavy dependence on groundwater proves particularly problematic during Maharashtra’s recurrent seasonal droughts. Groundwater serves as a lifeline for lakhs of citizens during these dry spells. However, local authorities have failed to incorporate this essential basic necessity into their planning frameworks, leading to groundwater depletion and the drying up of most wells and borewells post-monsoon.

The ministry of Jal shakti’s guidelines for urban water conservation outlines measures for cities to:

  • increase rainwater harvesting
  • reuse treated grey water and sewage water
  • Rejuvenate urban water bodies, including step wells, ponds, and lakes.

Regrettably, the only noticeable activity is the rampant construction of new buildings, further increasing the Pune district’s population which will create severe water scarcity. The petitioners hope that the high court directed committees be constituted without delay and that they undertake public hearings where citizens can voice their grievances related to water scarcity. The petitioners expect that the committees take requisite steps to ensure that the citizens are provisioned and supplied their rightful water quota.

“we don’t get corporation supply and our dependence is on private water tankers. We don’t understand how building permissions are given without making basic water supply available”, said Tushar Sarode, resident of sus.

“since 2013 our residential buildings do not get a single drop of water from gram panchayat, zilla parishad or PMRDA. We spend lakhs every month to buy private water tankers, till today green olive apartments must have paid crores to local tanker suppliers. What is shocking is that nobody is bothered in the entire government to solve our problems in spite of more than 10 follow up to each authority every year”, added Amrut Khodke, chairman of green olive apartment Hinjawadi.

The petitioners who issued the legal notice and were the original petitioners in the PIL: wagholi housing societies association, Pune district co-operative housing societies and apartments federation, Akhil Bharatiya Grahak panchayat, Pimpri Chinchwad co-operative housing welfare societies federation ltd., Baner – Pashan link road welfare trust, Balewadi residency co-operative housing welfare federation ltd., dear society welfare association, Bavdhan citizens forum, Hinjawadi employees and residents trust, Aundh Vikas Mandal, and association of Nagar road citizens forum noting the outcry in the residents of all urban areas of Pune district due to water scarcity had filed the water PIL at Bombay high court through Satya muley – advocate the supreme court of India and the Bombay high court.

The following parties were made respondents in the water PIL: 1) union of India, department of water resources 2) central ground water board 3) state of Maharashtra – water resources department 4) Maharashtra Jeevan Pradhikaran 5) Maharashtra water resources regulatory authority 6) Pune municipal corporation 7) Pimpri Chinchwad municipal corporation 8) Pune metropolitan region development authority 9) Zila parishad Pune PIL 126/2022 Satya muley advocate the supreme court & the Bombay high court

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Published on: 23rd November 2023

42 to 79 percent of the world’s groundwater sources will be exhausted by 2050, scientists claim

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In a new study, researchers found that about 20 percent of river basins have already reached their limit, where groundwater extraction from the ground exceeds that of the stream.

Photo: Ankur Paliwal

Groundwater is the most commonly used source of fresh water throughout the world. According to statistics  , about 200 crore people globally today depend on it for their daily needs and irrigation. According to estimates, 20 percent of the world’s population depends on crops irrigated by groundwater. The pressure on these reserves, which are already under pressure to meet the needs of the rapidly growing population and the continuous increase in crop production, is increasing.

Due to the rapid and uncontrolled way in which we are exploiting groundwater, these groundwater sources are depleting rapidly. On the other hand, these groundwater sources are not being recharged by rain and rivers. Analysis of satellite data obtained by NASA has revealed that the water level of 13 of the world’s 37 major groundwater sources has reached the danger mark. The rate of recharge of groundwater there is much less than the rate of its exploitation. The problem of falling groundwater level is becoming more serious in areas where intensive agriculture is done. Also, due to this, the pressure on rivers to supply water to the agricultural sector is increasing day by day. Assessments show that by 2050, its widespread and serious impacts on rivers, lakes and wetlands around the world will become apparent.

To understand this, an international team of researchers has attempted to measure the rate at which existing groundwater is being mixed into rivers and lakes. Which is called flow of current. He has also studied how the exploitation of groundwater for agriculture has affected this process. The researchers found that about 20 percent of river basins have already reached their limit, where groundwater extraction from the ground exceeds that of the stream. This  study  has been published in the international journal Nature.

Scientists have also used climate change models to predict how river flows will decrease in the future. In which they found that 42 to 79 percent of the world’s groundwater sources will be exhausted by 2050. Due to which they will be unable to maintain their ecosystem. Inge de Graaf, chair of environmental and hydrological systems at the University of Freiburg in Germany, explained what devastating effects this could have in the future.

According to the graph, it is very clear that if there is no water in the stream then definitely the plants and animals living there will die. Also, more than half of the crops which depend on groundwater for irrigation will also be destroyed. According to this latest study published in Nature,  in the valleys of Ganga, Indus and Mexico, where dependence on groundwater for crop production is high, river flow is decreasing due to uncontrolled exploitation and as Africa and Southern Europe The demand for groundwater is increasing in the areas where the impact of serious water crisis will be visible in the coming few years.

The situation is serious in India also

Globally, groundwater is exploited the most in India, where 230 cubic kilometers of groundwater is used every year, which is about a quarter of the global use of groundwater. Scientists have estimated  that in North India, which is the main wheat and rice producing region of the country, groundwater is depleting at the rate of 5,400 crore cubic meters per year. A report released by NITI Aayog  had also expressed concern over the continuously decreasing groundwater level. According to him, by the year 2030, the decline in groundwater in the country will take the form of the biggest crisis. By 2020, groundwater in 21 cities including Delhi, Bengaluru, Chennai and Hyderabad will be on the verge of depletion.

It is noteworthy that to deal with the groundwater crisis, the Modi government had proposed ‘Atal Groundwater Scheme’ in March 2018. Which was to be implemented with the help of the World Bank in a five-year period from 2018-19 to 2022-23. Its goal was to ensure proper and sustainable management of groundwater with everyone’s participation in the seven states of Gujarat, Haryana, Karnataka, Maharashtra, Madhya Pradesh, Rajasthan and Uttar Pradesh, which are facing serious groundwater crisis. But due to lack of Cabinet approval, this scheme has been stuck for the last one and a half years.

How can there be a solution?

Recently, the Intergovernmental Panel on Climate Change had warned in one of its assessments that by 2050 the global population will cross 1,000 crore. It also explained how the threat of global warming can be tackled through proper water management in the agricultural sector. De Graaf noted that many places in the world have achieved success in limiting groundwater use through agricultural techniques, such as in parts of the Mekong Delta in Southeast Asia where water-intensive rice crops were grown as a pilot project. Coconut is being cultivated in place of sugarcane crops.

If we do not wake up today, our future generations will have to face such a groundwater crisis, the effects of which will be no less than a time bomb. Because of the uncontrolled way in which we are exploiting this resource, and due to this the pressure on groundwater sources is increasing. The consequences would be dire as it would take decades to refill these underground water systems.

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Author:  Lalit Maurya

Publish On: 04 October 2019