A flock of grey cranes peck for food amidst the shallow watergrass. Credit: Manipadma Jena/IPS

By Manipadma Jena
KOLKATA, India, Jan 31 2020 (IPS)

Ramkumar Mondal’s farm is awash in a brilliant yellow mustard bloom. A flock of grey cranes peck for food amidst the shallow watergrass. But Mondal’s fishpond digs in there like a do-or-die last sentinel as nearby high-rise buildings, a symbol of development and encroachment, menacingly tower over the fishpond, permanently blocking the eastern sun so essential for the pondwater to convert sewage into fish-feed.

Mondal’s fishpond is part of the East Kolkata Wetlands (EKW), spread over 12,500 hectares in coastal West Bengal’s Kolkata city in eastern India that “promotes the world’s largest wastewater-fed aqua culture system,” Shalini Dhyani, a senior scientist at India’s Council of Scientific & Industrial Research (CSIR)-National Environmental Engineering Research Institute (NEERI), told IPS.

EKW was designated a Ramsar site in 2002 under the convention and identified as a perfect example of the “wise use” of a wetland ecosystem.

Currently, everyday some one billion litres of wastewater, an estimated 30 to 50 percent of the sewage from central Kolkata, is drained into, treated and reused by the fishponds and again drained out to rice and vegetable farms from where, in about 30 days, the water drains into the sea.

“Where wastewater might deteriorate the entire wetland water quality, Kolkata’s wetland cleans its wastewater in just 20 days,” said Dhyani, who is also the South Asia chair Commission on Ecosystem Management (CEM) of the International Union for Conservation of Nature (IUCN).

Where rich biodiversity meets traditional knowledge

A government baseline report prepared on the EKW prior to its designation as a Ramsar site in 2002 mentions 40 fresh-water and brackish water fish species were common, 11 of which were cultivated. Plant species found were 104.

This complex play of diverse organisms from the humble microbes, wetland plants to more valued fish, aided by sunlight, suitable temperature, dissolved oxygen in the water – all free of cost – cleans Kolkata wastewater of 80 percent organic pollution and 99.9 percent coliform bacteria “much better than sewage treatment plants,” biologists said.

A key insight into how the system works also lies on the reliance of the fisherfolk feeding the human-waste-turned-to-algae to their fish.

“In a conventional waste water treatment, booming algae might be an issue while, in EKW the phytoplankton and algae growth, which is nothing but optimised human waste, is regularly netted by fishermen and fed to the fish. Every hectare gets 20 to 60 kilograms of (nature’s free) feed a day,” Dhyani said.

There are also unique bacteria in the wetlands that serve as “bio-filters”.

“There are 40 species of algae, 2 species of fern, 7 species of monocot and 21 species of dicots plants plays an important role in cleaning the sewage water by reducing the eutrophication, preventing oxygen depletion and ensuring that the fish survive. Around a dozen aquatic vascular hydrophytes in the region serve as bio-filters,” said Bonani Kakkar a leading Kolkata-based environmental activist heading non-profit People United for Better Living in Calcutta (PUBLIC).

There is no indication of how long the wetlands has been functioning as a natural waste treatment plant. But it could be well over a century. The East Kolkata Wetlands Management Authority’s (EKWMA) historical timeline shows that in 1884 underground sewers to the city were laid, and by this time the waterbodies that now comprises EKW had already a number of established fish farms.

A conventional Sewage Treatment Plant (STP) would have cost Kolkata $125 million back in 2010. But thanks to this complex system in the wetlands, the city has its own free sewage treatment, according to a University of Essex study.

In an area already marked out for ‘development’ Ramkumar Mondal’s domestic sewage-fed fishpond makes the most of what little time is left. Harvested rice gives place to a mustard crop while a pumpkin vine perches over the water. Credit: Manipadma Jena/IPS

Aggressive urban encroachment threatens wetland biodiversity, ecosystem services

One would assume this unique and free natural sewage system would be highly preserved.

But Kakkar is concerned. It was Kakkar’s non-profit PUBLIC that in 1991 filed the first-ever lawsuit against land-use change and encroachment in the EKW that resulted in a major court ruling the following year.

“The 1991 public-interest lawsuit by PUBLIC was triggered by a veiled land-grab for setting up a World Trade Centre on 227 acres (90 hectares) of wetland proposed by a private company, and it was supported by the West Bengal government,” she told IPS.

Calcutta High Court’s ruled in 1992 and directed the state government to ensure no change in the wetlands’ land use. 

“The EKW are yet to be demarcated (on the ground, though an official map exists) 28 years after the court order. A proper management plan is yet to be formulated,” Kakkar said. 

Because of this lack of management plan and clear demarcation, there is a frenzy of building activity around the wetlands on land that was previously designated as “wetlands” but is no longer legally so and has since been taken over for development.

“From 1992 onward, PUBLIC  has had to file over a dozen complaints in court against violations of the order, including two in India’s highest court against projects that received funding commitment from the state government’s industrial development wing,” Kakkar said adding, “all of these have posed serious threats to the biodiversity, flood mitigation and other benefits offered by the Kolkata wetland.”

High-rise buildings glare down at one small remaining patch of the East Kolkata Wetlands (EKW) fishponds. Credit: Manipadma Jena/IPS

Protection, not development, of the wetlands is needed

“Ironically, some of the biggest threats have been due to the state government – large construction proposals for a flyover bridge and another to access the wetlands, for instance,” Kakkar explained.

Studies and anecdotal evidence tell of surreptitious land-use change where fish ponds are being converted to rice farms aimed eventually for small industrial or residential utilisation.

EKWMA, the government custodian, shows on its official website that 391 cases for violations it has registered with local police from 2007 till 2014. More recent updates are unavailable. Calls made by IPS to EKWMA for their response went unanswered.

Rich returns from a perfect nature-based solution

But one thing is clear, between 1980 to 2000 around 2,200 hectares fishponds had been converted to rice paddies.

The remaining 254 individual sewage-fed fish ponds, some single holdings sprawling over 144 hectares with the smallest being a third of a hectare, are spread over 3,900 hectares on the eastern fringes of the city, crisscrossed with canals and creeks, a dead intertidal river, Bidyadhari, and another named Kulti that carries the city’s wastewater to the Bay of Bengal.

Together they send 10,000 tonnes of fish to Kolkata’s markets yearly, fulfilling one-third of the demand in a city of over five million people.

Not having to buy commercial fish feed saves the farmers money.

And this “nutrient subsidy” fish growers get from the wetland and their low transportation cost to their market is passed on the Kolkata city folks who get fish and vegetable not only farm fresh but reportedly up to 30 percent cheaper than India’s other metropolitan cities. For the city’s poor, the wetland fish remains one of the few affordable protein sources.

Fishing and the vegetable farms in this biodiverse wetland provides livelihoods, albeit many of these are subsistence-based, to around 100,000 people including large numbers of women and children. Maintaining fishponds, catching fish and carrying them to markets, sowing, weeding and harvesting vegetables and rice are among several employments, some of which get paid in kind.

“Kolkata’s wetlands ecosystem is an excellent example of a nature-based solution,” Dhyani told IPS.

Generations of knowledge and practices could be laid to waste by development

Dhyani said three generations of EKW fishers’ traditional knowledge is kept alive from father to sons. Pondwater is cleaned using kerosene, lime and oil cakes; digging the ponds to the accurate depth of three to five feet to allow sunlight to the bottom, mixing the right amount of sewage, maintaining the required time for conversion of wastewater into fish feed, when to add spawns and how to protect the embankments from emerging threats of water hyacinths are knowledge gleaned from long years of experience.

But it is slowly disappearing. Like the wetlands around Mondal’s fishpond, which has long been converted for development, though a few straggler ponds remain.

Some of the younger generation have turned away from traditional wastewater fisheries owing to several factors including an uncertain future in the face of aggressive urban encroachment and demand for land for city expansion. 

“My son has completed a diploma in plumbing and left last year to work in Pune [a city near Mumbai – India’s commercial hub],

“He dreams of going to Saudi Arab, says there is money there,” he told IPS, with an inaudible catch in his voice.

Excerpt:

Farmers on the Indus River Delta. Over the years the water has dried up and sea has ingressed inland. Credit: Zofeen Ebrahim/IPS

By Zofeen Ebrahim
KARACHI, Aug 21 2019 (IPS)

Gulab Shah, 45, is having sleepless nights. He and his family are worried about their imminent migration from their village in Jhaloo to a major city in Pakistan, thanks to the continued ingress of sea water inland. 

“That is all that I and my brothers discuss day and night,” he told IPS over telephone from his village which lies near Kharo Chan, in Sindh province’s Thatta district.

He and his family also talk about what it “will mean living among strangers, in a strange place; adopting an unfamiliar lifestyle; losing culture and identity”.

Of the nearly 6,000 acres of land that Shah’s father inherited, over 2,500 acres have slowly been swallowed by the sea over the last 70 years.

And even though they still have enough land to sell to enable them to set up their home in a city, “there are no buyers!” Shah proclaimed.

“Nobody wants to buy land that they know is going to be submerged soon,” he said.

And if they stay, they do not have enough farm hands to work on their land. “Every year more and more people, mostly farmhands, are moving out of here as there is less work for them,” Shah explained.

For millions of years, the River Indus sustained the marshes, the 17 creeks, miles of swamps, mangrove forests and the mudflats along with the various estuarine habitats in the fan-shaped Indus delta, before reaching its final destination and emptying into the Arabian Sea. It marks a journey of 3,000 km from the Himalayas.

Generations of families have lived in the Indus River Delta. But as the flow of the river has reduced drastically over the years many are leaving and making their way to the cities in search of a better way of life. Credit: Zofeen Ebrahim/IPS

Today this Ramsar Site, a wetland of international importance, is parched and dying a slow death.

The dams and barrages on the river sucked the fresh river and stopped it from reaching the delta. It also resulted in a reduction of sediment deposition, giving the sea a perfect opportunity to ingress into the land.

Climate change has had an impact too here. The rains are unpredictable now, water levels don’t increase and conversely over the years there has been an increased demand for water for both agricultural activities and a growing population.

If the delta gets 10 million acre feet (MAF) consistently over the 12 months, or 5,000 cubic feet per seconds daily, as promised through the provincial water apportionment Accord of 1991, the delta would thrive.

However, that is not the case. “Along the way, from the mountains to the sea, there is shortage, pilferage  coupled with losses due to an ageing distribution system,” explained Usman Tanveer, the deputy commissioner or principal representative of the provincial government in the district of Thatta.

“We require a well regulated water management system from the time the water leaves the mountains till it reaches the Arabian Sea,” he told IPS.

He pointed out that as a specialised subject, water needs to be looked into more scientifically. For example, said Tanveer, “First and foremost, we need proper research and experts to be able to plan for future water needs and this includes coming up with finding optimal conservation solutions, natural sites if small dams have to be built (instead of frowning upon whenever the D [dam] word is brought up).”

“We need to have a legal framework in place so thefts are deterred, and most importantly, an integrated mechanism to collect water cess from every user,” he concluded.

A 2018 report by United States-Pakistan Centre for Advanced Studies in Water (USPCASW) at Mehran University of Engineering and Technology (MUET), Jamshoro, using historical maps and field research, noted that back in 1833 the delta spanned some 12,900 square kilometres (sq km); today it was a mere 1,000 sq km.

“The human impact on the environment, the change in the natural flow of the river, resulting in reduction in sediment deposition, and sea-level ingress and climate change have resulted in the contraction of the delta,” said Dr. Altaf Ali Siyal, who heads the Integrated Water Resources Management Department (IWRM) at USPCASW, and is the principal author of the delta report. The study concluded the delta today constitutes just 8 to 10 percent of its original expanse.

But many living in the delta believed it would begin to die when man reined in the mighty Indus. The construction of the Sukkur barrage (1923 to 1932) by the British, followed by Kotri barrage in 1955 and Guddu in 1962, squeezed the life out of the once-verdant delta.

Prior to this Sindh province received 150 MAF of water annually, now it is less than one-tenth of this at only 10 MAF annually. “It would be even better if it receives between 25 to 35 MAF water so that it can return to its past grandeur,” Siyal told IPS.

Take the case of the Shah’s land.

“Till 10 years back about 400 acres were still cultivable,” said Shah. However, this year, they were able to cultivate just 150 acres. “Acute water shortages on the one hand and increased salinity on the other, has made it impossible to till all of our land,” he explained.

Until the 1990s his family grew the “sweetest bananas” and the finest vegetables on over 400 acres of land. They had led a prosperous life.

All of that is lost now.

Two years back, because of acute shortage of water, Shah and his brothers decided to grow the heart-shaped green betel leaf, locally called paan, over 12 acres of land.

But Dr. Hassan Abbas, an expert in hydrology and water resources has both long term and short term solutions to revive the delta.

“One would be to rejuvenate the natural course of the river the way United Kingdom, the United States and even Australia are by dismantling dams and adopting the free flowing river model,” he told IPS.

“A free flowing model is one where water, silt, and other natural materials can move along unobstructed. But more importantly, it’s one by which the ecological integrity of the entire river system is maintained as a whole,” explained Abbas.

The other, more imminent, solution is to address the way farmers irrigate. “We need to make agriculture water-efficient without compromising on our yield. The water saved thus can be allowed to flow back into its course and regenerate the delta.”

He  has a pilot in mind that can build the confidence and capacity of the farmers when it comes to water-efficient farming, and at the same time, stopping the supply of water in that area by blocking one canal.

“See if it is socially and economically acceptable to the farmers and the environmental benefits accrued,” he said, adding, “If there is a positive side, more canals can be closed.” 

However, a quick and cost-effective manner of addressing water shortage, in cities like Karachi, said Abbas, was through exploiting the riverine corridors of active floodplains.

“The Indus has 6.5 km of flood plain on either side which has sweet sand under which is the cleanest mineral water you can get. Most of the big cities are not more than 3km away from the river bed. All that needs to be done is to pump that water up from the depth of 300 to 400 feet using, say solar energy, and supply it to the cities through pipes,” explained the hydrologist.

But what about the Shah’s village in the delta?

“It is far, about 200 km from the river,” agreed Abbas, conceding the people in the delta urgently needed to be supplied with drinking water.

“It would require a much longer pipeline, but would still be cheaper to transport the same water that way,” he said.

According to him, there is anywhere from 350 to 380 MAF of water available in the riverine aquifer. “We Pakistanis need at the most 15 or a maximum of 20 MAF/year, (this is excluding water for agriculture) to meet our needs. It is a much cheaper option at two to three billion dollars than a dam costing 17 billion dollars!”