Storage and Supply

The Government of India launched the Accelerated Rural Water Supply Programme (ARWSP) in 1972-73 to ensure provision of adequate drinking water supply to the rural community through the Public Health Engineering System.

The second generation programme started with the launching of Technology Mission in 1986-87, renamed in 1991-92 as Rajiv Gandhi National Drinking Water Mission. Stress on water quality, appropriate technology intervention, human resource development support and other related activities were introduced in the rural water supply sector.

The third generation programme started in 1999-2000 when sector reform projects evolved to involve community in planning, implementation and management of drinking water related schemes, later scaled up as Swajaldhara in 2002.

The Rural Water Supply (RWS) sector has now entered the fourth phase with major emphasis on ensuring sustainability of water availability in terms of potability, adequacy, convenience, affordability and equity while also adopting decentralized approach involving PRIs and community organizations.

The report presents a study of the Rakaskop tank, which caters to the drinking and domestic water purposes of the Belgaum city of Karnataka. In recent past, it has been observed that the amount of water stored during the monsoon season is not sufficient for domestic purposes in the city throughout the year. The study estimates the dependable yield of the tank and also the evaporation from the tank.

With the failure of monsoons in Rajasthan and dry-up of the Bilaspur dam, the water situation assumes graver proportions in most parts of Rajasthan, besides Jaipur, Tonk and adjacent districts. These areas, now in the news for acute water shortage problems, have always depended upon monsoons for their traditional rainwater-harvesting systems and the riverine sources.

While the Government has taken remedial measures with construction of tube-wells across the rural and drought-prone areas, they have been sporadic and insufficient at their best.  Merely announcing relief measures and planning of schemes on paper as an immediate disaster management strategy are not solutions to mitigation of water problems in this State.

In the study, Soil Conservation Services Curve Number (SCS-CN) method is used to predict runoff volume from the Bewas basin at a dam site meant to augment municipal drinking water supply to Sagar city. The SCS-CN model involves relationship between land use, land cover, hydrologic soil class, and runoff Curve Number of hydrologic soil cover complex, which in turn is a function of soil type, land cover and antecedent moisture condition.

The study assesses sedimentation rate, water spread area and volume of the Bhakra reservoir in Satluj basin using remote sensing data of IRS-1B satellite and LISS-II sensor data of the years 1988-89 and 1996-97. The original elevation-area capacity curves and the reservoir levels on the eight dates of pass of the satellite were obtained from the Bhakra Beas Management Board, Nangal.

Using the trapezoidal formula, the capacity in between the maximum (513.904 m) and minimum (450.436 m) observed levels was assessed for the year 1996-97. The loss of capacity till 1988-89 was 491.315 mcum and till 1996-97 was 807.354 mcum. These could be attributed to the sediment deposition in the zone of study of reservoir.

The study assesses the quantum of seepage to the aquifers through percolation ponds and establishes their zone of influence, and based on these, correlates the quantum of seepage to the total storage loss in the pond. The assessment of the benefits of the ponds, in terms of artificial recharge to the aquifers is done through an intensive study of two percolation ponds in Tamil Nadu.

A percolation pond is a small water harvesting structure, constructed across a natural stream or water course to harvest and impound the runoff from the catchments for a longer time, to facilitate vertical and lateral percolation of impounded water into the soil substrata, thereby recharging groundwater storage in the zone of influence of the pond.

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The paper critically evaluates the Greater Bangalore Water and Sanitation Project (GWSAP), implemented by the Bangalore Water Supply and Sewerage Board (BWSSB). This project aims to extend piped water supply from the Cauvery to over two million residents in peri-urban Bangalore. This ambitious project has been viewed against the backdrop of the broader trends and debates around market-based reforms in the water sector in Karnataka.

This document by Reach Out Water Solutions (ROWS) highlights the daily reality of people living in the slums of Mumbai and the inadequate water supply available to the 10 million slum residents to meet their daily requirements.

It presents a business plan, namely the Slum Water Programme (SWP) that proposes a comprehensive, community driven, decentralised programme to meet the water needs of the slum community.

The programme proposes to do this in three ways:

• Firstly, by dealing with the problem of inadequate supply of water to the slum residents by the municipality, through increasing the availability of water
• By providing improved quality of water through utilising water purification techniques
• Improving access to water by making it available at the doorstep

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