Surface Water

Author: S. Vishwanath
Video courtesy: Zenrainman

When a city adds nearly 3 million people in a span of a decade ensuring water supply to its citizens seems a huge challenge. One critical thing to realize is that the mind-set of ‘providing’ water has to change and become one of ensuring that citizens can access water of requisite quality.

 This publication will serve to be useful reference material for policymakers, implementing agencies, environmentalists and those who enjoy the beauty and diversity of India’s water bodies.

Lakes are not only a source of water and livelihood for many of our populations, but they also support a large proportion of our biodiversity. The wetlands, shallower peripheral areas of large lakes, provide breeding and nesting grounds to huge population of birds, many of which migrate to India from as far north as Siberia.

Interdependence of glacial fluctuations to hydrometeorology and sediment transfer in the connected river basins is well recognized in the Himalayan region. Considering the increased rates of glacial recession during past few decades, possibility of creating new lake basins by glacial melt and damming of rivers followed by lake outbursts and related flash floods is likely to increase.

 Residents of L&T South City and Brigade Millenium in JP Nagar, Bangalore formed a citizen initiative to save the neighbouring Puttenahalli Lake from becoming a dumping ground for construction debris and waste. A team from India Water Portal visited the lake in June 2011 to see the progress and challenges faced by such citizen initiatives.

“Current economic philosophy exalts consumption and growth. If we are hypnotised by visions of 8% or 10% growth, we are bound to ‘demand’ more and more and still more water; and either government engineers or private companies and their engineers will come up with supply-side answers in the form of large projects which will cause even greater distress to the rivers”. 

Tehri Dam across Ganga
Source: haridwar.nic.in/ gangaji.htm

I am very grateful to Prof. Sudha Bhattacharya for having invited me to this Seminar. I was not sure whether what I have to say would fit in well with the theme of this Seminar, but she persuaded me to say yes, and so here I am.

This report by the Centre for Ecological Sciences, Indian Institute of Science, Bangalore highlights and argues for the the case of saving the Gundia river, one of the most important tributaries of the river Kumaradhara in Hassan district in Karnataka, which is known for its very rich vegetation and biological wealth. This is in the context of the proposal put forward by the Karnataka Power Corporation Limited to implement the Hydroelectric project (GHEP) on the river. 

It explores the understanding of the local controls on the retreat of glaciers of the Baspa valley in Himachal Pradesh. The geomorphic records mapped are accumulation zone, exposed ablation zone, moraine-covered ablation zone, snout, deglaciated valley, lateral moraine, medial moraine, terminal moraine and hanging glacier.

These are some of the questions which led Tarun Jayaram, the film-maker to explore traditional water systems in the country. From the documentary’s opening moments, the director engages us with a beautifully shot array of footages ranging from pilgrims taking a holy dip of Ganges to beautiful baolis and tankas of Rajasthan to the ancient town of Hampi in Karnataka, while establishing how rivers have been an integral part of Indian culture and how its rich tradition of harvesting rainwater needs to be re-established to deal with the present day water crisis. Over the refreshing images and soothing audio, it advocates the need for community participation in rejuvenating the traditional methods of rainwater harvesting. 

Fisherman on Hessarghatta Lake on the Arkavathy River

It is here in a small pond that the Arkavathy river is famously said to originate. It moves down the hill in the form of a spring and enters the first of the man-made reservoirs, called ‘tanks’, the Chikkarayyappanhalli Kere. From thence begins the journey of this tributary to the Cauvery. Passing through a series of tanks built to hold its water for irrigation it comes to the large ‘Nagarakere’ at Dodballapur. The entire drinking water for the town of population 100,000 used to come from this large tank. Moving further on the river comes to the almost 7 sq.km. Large Hessarghatta tank. In 1894 this tank was enlarged and became the first external source of water supply to the city of Bangalore.