Sahil yaduvanshi, 4, loves airplanes. He does not have to go far to look at one. He just has to peer out of his play school window and look up every few minutes to see one. “This is Cattie…,” he shouts out to his friend Pushpesh as he looks out. Sahil enjoys the sight of the planes, and wants to become a pilot when he grows up. His only complaint is to do with the roar of the planes. “I cannot hear my teacher and my friends because of the noise,” Sahil said. He studies in Aadyant pre-school in Vasant Kunj in Delhi. Most of his friends find it difficult to concentrate after a third runway—Runway 29—became operational at the Indira Gandhi airport in September 2008. “The children get disoriented as there is an airplane flying by every few minutes. We have to repeat lessons and even raise our voices to be heard,” said Bhavina Bembi, a school counsellor.

In flight path The problem of noise disturbance is not restricted to the school but the entire residential area from Andheria Modh, east of the airport, to Bijwasan to its west. These localities are in the airport flight path. “We got the noise levels in Vasant Kunj area checked privately and found it varies between 75 and 100 decibels,” said Anil Sood, president of the non-profit Chetna.

This is much more than the limit of 55 dB during the day and 45 dB at night set by the Central Pollution Control Board (cpcb) for residential areas. Before the runway was built, the noise level varied from 59-65 dB, according to studies carried out by the cpcb in areas around the airport in 2004 and 2007. Environmental clearances were also given a go by. Sood said he had filed an RTI application and found no environment impact assessment was carried out before constructing the third runway. The Delhi International Airport (Private) Ltd (dial), the company that manages the airport, has now agreed to undertake noise abatement measures. This was after a meeting with the Environment Pollution (Prevention and Control) Authority (epca) on January 10 to discuss noise abatement measures.

Measure noise “We are interacting with resident welfare associations of Vasant Kunj and other localities. We will take corrective measures,” a dial spokesperson said. dial has promised to install six aircraft noise monitoring systems (anms) by June this year. This conforms with cpcb guidelines for monitoring noise pollution around airports, issued in June 2008. “Right now airports hire contractors to measure noise pollution.

They use a simple sound level meter. An anms is a complete set of sound level meters along with software connected to the air traffic control room and measure the noise of each aircraft that lands or takes off,” said a cpcb official. He said this would help compare data of aircraft. These instruments cost Rs 50 lakh each and would have to be imported. “Class 1 sound level meters, made as per international specifications, cost about Rs 10 lakh and come with their own software. An anms will have three or four of these devices, said Piyush Kumar a sales engineer with Josts Engineering Company Ltd, an importer. As per the minutes of the epca meeting, the airport managers have proposed closing Runway 29 during the night and switching off one or two engines at the time of landing to lower noise levels. Phasing out old noisy aircraft and using only one runway during off-peak hours have also been proposed. Once that happens Sahil has better chances to work towards his desire to fly.

A cpcb official said it is difficult to maintain the noise standards in residential areas near airports at par with other localities. New standards are being worked out, he said. In most countries, noise limits in the airport vicinity vary from 57 dB to 90 dB with a night curfew in many of them. Residents around the airport want a ban on flights at night with immediate effect.

Construction of an embankment along the 10-km stretch of the Sabarmati has begun in Ahmedabad despite warnings that it may hamper natural drainage in the city and that its design is inherently flawed. The 8.5-m-high embankment is part of the Sabarmati Riverfront Development Project, the first in India where the river will be squeezed to yield land for commercial, residential and open spaces. Project planners expect to recover the cost by selling this real estate.

The project’s Environment Impact Assessment (eia) report, however, said that embanking the Sabarmati would not just prevent drainage and “cordon the river away from the people”. It would also increase its speed, thereby increasing erosion that would affect the stability of the retaining walls and bridges. The report was prepared by the Ahmedabad-based Centre for Environmental Planning and Technology and the Gujarat Ecology Commission in Vadodara. Project designer hcp Design and Project Management Pvt Ltd, formerly called Environmental Planning Collaborative, said drains from low-lying areas would be directed to the river through underground channels. The riverfront project was proposed in 1997 to develop the banks into recreational zones.

But will it? The Sabarmati is a monsoon river that remains partially dry for most part of the year. But for water from the Narmada canal that met it upstream of Ahmedabad, the Sabarmati lacked aesthetic appeal, noted the eia report. “It (riverfront) is unlikely to be an inviting public place conducive to cultural and recreational activities,” eia said.

Inspired by the riverfront development of the Thames in London, the Sabarmati project envisaged channelizing the river into a uniform width of 275 m from the varying 330m to 382 m. Ahmedabad residents feared that constricting the width of the river, would raise the water level. During the 2006 floods, the water level had reached almost the base of the bridges. According to project consultants who prepared reports on flood estimation, the increased speed of the river will bring down the highest flood level. Nonetheless, the Ahmedabad Municipal Corporation plans to raise the height of bridges with a hydraulic jacking system.

Two consultants were put on the task of flood estimation in the Sabarmati. C C Patel and Associates estimated a peak flood of 0.525 million cubic feet per second (cusecs) and Sheldia Associ ates India estimated 0.594 million cusecs. They recommend building embankments that can withstand a flow of up to 0.475 million cusecs. “Considering the rainfall may not be uniform over the catchment area, they (consultants) have suggested a reduction of 10-20 per cent…. This may have serious implications in case of recurrence of most unlikely event of 5.9 lakh cusecs (0.59 million cusecs) flood,” the eia report said.

EIA had suggested terraced or sloping embankments.

“Sloping embankments offer greater resistance to flood water by helping dampen the flood velocity, dissipate the impact of floods over a much larger surface area and withstand hydraulic pressures several times higher than vertical embankments such as the ones proposed in the project,”

it said.

The flood estimation studies were done before 2002. Since then the rainfall pattern has changed. In August 2006, a flash flood washed away slums and damaged pathways constructed along the river in the first phase of the project. The peak discharge in the river then was less than 0. 3 million cusecs and the estimated loss, Rs 20 crore. “The retaining walls will protect the city against greater floods,” said an official of the Sabarmati Riverfront Development Corporation Ltd, set up by the Ahmedabad Municipal Corporation to oversee the project.

Environmentalists are sceptical. “They haven’t learnt lessons from the Kosi. Embankments can never stop floods,” said Anupam Mishra, who heads the environment division of Gandhi Peace Foundation in Delhi. Riverfront development on the Tapi was put on hold after floods in Surat in 2006. Biswaroop Das, faculty member of the Centre for Social Studies, who co-authored a citizens’ report on the Surat floods, said Indian rivers could not be compared to the Thames and the Hudson. “Our rivers are monsoon-fed, while there’s are snow-fed rivers. Why don’t the planners understand this simple fact?” he asked.

	Hydroelectric projects in Alaknanda and Bhagirathi river basins

While going up the meandering road from Tehri to the holy town Gangotri during the thick of monsoon, the Bhagirathi appeared to get uneasily quieter with each hairpin bend; until Chinyali Sor village near Dharasu, 45 km from new Tehri town. The Tehri reservoir ends in the village. The river thereafter springs back to life and the roar of the gushing waters fills up the valleys. But the landscape gradually changes. Some of the mountains are bare and dotted along the road, every 500 metres, are graffiti, posters and signboards, giving out ominous messages. “Blasting Site” in bold, “Bandh Ganga ki hatya hai” (dams will kill the Ganga) and “Ganga ko aviral behne do” (let the Ganga flow unobstructed) are most common along this main stretch of pilgrim route where devotees go to pay their respects to Goddess Ganga, believed to be the daughter of heaven who came down on Earth through the matter locks of lord Shiva.

That apart, the river is fast becoming a favourite destination for hydroelectric projects, several of which are coming up on the Bhagirathi and Alaknanda basins (see map), tributaries of the Ganga river. The highest of them, Bhairon Ghati, is 27 km from the Gangotri glacier. The Uttarakhand government claims it needs the projects. “We do not have many resources except the rivers. Power from these rivers is the only source of revenue for the state. Besides, we can also control floods and have water for irrigation round the year,” said Yogendra Prasad, chairperson of Uttarakhand Jal Vidyut Nigam Limited (ujvnl) and adviser to the chief minister. Fifty five hydropower projects are in different phases of construction and planning. The 162 km stretch of the river from Gangotri to Devprayag will have 11 big dams while the 145 km stretch of Alaknanda from Badrinath to Devprayag will have more than nine big dams apart from several other small projects.

But things came to a head in June this year when G D Agarwal, former member secretary of the Central Pollution Control Board, sat on a nine-day fast. His demand was that no hydropower projects should come up on the 125-km stretch between Uttarkashi and Gangotri. He contended that it would affect the flow of the river and impact its purity. “Run of the river dams are the ones where water will be stored and released periodically through tunnels at locations on which the powerhouse will be built. If this goes on in a series, over long stretches there will be no flow in the channel,” says Agarwal. Following the protest, the state stalled two projects, Pala Maneri and Bhairon Ghati. The Union Ministry of Power has set up a committee to look into the questions raised by Agarwal. In response, B C Khanduri, chief minister of Uttarakhand, is reported to have said that “the state respects Agarwal’s sentiments and that he should also understand the state’s energy requirements”.

According to Anupam Mishra, environmentalist with Gandhi Peace Foundation,

“Engineers feel that a river meeting into the sea without being of use for irrigation or power is a waste of the water in it. If we disrupt the natural flow of a river, it can create havoc. Merging into the river prevents large quantity of saline water ingress. This is crucial but is considered unscientific. Also, they cannot predict that a strong earthquake won’t happen in the Himalaya. How will they save the downsteam areas from flooding if the dam breaks?”

Experts also say that the ecology of the area will be adversely impacted, the qualities that make the Ganga what it is will be gone and the river may dry up.