Rainwater Harvesting

This paper published in the South Asian Journal of Tourism and Heritage begins by highlighting the importance of the traditional small water bodies in Braj, commonly known as kunds, as important freshwater sources as well as an important part of the culture and the traditions of the area.

There were 1000 such kunds, which used to be the source of fresh water in Braj in earlier times. The water was used for multiple purposes like irrigated agriculture, domestic uses, drinking water for cattle, bathing etc. Due to rapid urbanisation, lack of maintenance and prolonged negligence in the last 50-100 years, most of the kunds today have become silted up and are nearing extinction.

The impending crisis for fresh water has forced the planners and policy makers to take cognizance of these traditional water bodies and an urgent need has been identified for taking necessary measures to restore the kunds. The present study thus aims at understanding the reasons for deterioration of the kunds and makes some technical suggestions for revival of these kunds.

This paper by AR Shivakumar of the Karnataka State Council for Science and Technology (KSCST), presented at a national seminar organised by ISRO at NIAS Bangalore in 2010, begins by highlighting the increasing problem of scarcity of water that the city of Bangalore has been experiencing in recent years and suggests a required plan of action for a sustainable water supply system in the city.

This presentation by ACWADAM on hydraulic conductivity deals with the hydrologic properties of rocks that signify the status of a rock as a good or poor aquifer. The status of a rock with regard to groundwater occurrence and movement is decided by its porosity (specific yield, more practically) and its hydraulic conductivity. These properties decide whether a rock can store and transmit groundwater.

Hydraulic conductivity is also commonly called as permeability of the rock or rock material and is its ability to allow the flow of groundwater through it. A rock with good hydraulic conductivity allows groundwater to easily flow through it.  

The presentation describes Darcy’s Apparatus, which comprises of a glass cylinder filled with porous sand. The glass cylinder with the sand bed had an inlet for inflow of water and an outlet for outflow of water. Two vertical glass tubes (manometers) are fitted in the sand tube placed at a fixed distance from each other to measure the respective levels (hydraulic heads).

The presentation by ACWADAM deals with measurement of weather parameters and outlines the methods used in weather related data collection and analysis. Weather information is necessary for the planning and implementation of watershed programmes, especially in understanding factors like groundwater recharge, the relationship between recharge & discharge and in aspects like irrigation planning.

The presentation by ACWADAM deals with a case study of augmenting groundwater resources by artificial recharge in Kolwan valley, Mulshi taluka, Pune. The DfID funded project was undertaken by the British Geological Survey in collaboration with its partners in India from 2002–2005. The objectives of the study were:

• Improved knowledge of the impacts of managed aquifer recharge in different physical and socio-economic settings.
• Guidance on scope and effectiveness of managed aquifer recharge for implementers, funders and policy makers.
• Dissemination of knowledge.

Floods: lessons to be learnt from the massive flooding in Surat city

A report by IIM criticises the way in which dams are managed in the country and calls for the need to apply Management Science / Operations Research techniques and information technology to improve dam management and prevention of floods

Flood fury: are we ready to face such an event?

Our publication is coming up with the annual "Case Study Special Issue” in Sept. 2010. Its a collector’s issue, where we are covering leading industries across the globe.

This article is written in response to an earlier published article “Chasing a Mirage: Water Harvesting and Artificial Recharge in Naturally Water-Scarce Regions” in the Economic and Political Weekly and argues that the paper makes a number of assertions about small water harvesting systems, that are based on faulty assumptions and inadequate information.

My house is about 20 years old and is located in R T Nagar in Bangalore. In 1990, I had got a borewell dug. The Borewell is about 150 feet deep and has been giving me excellent quality water until about 2 years ago when I started noticing muddy water. The water that is pumped to an overhead tank contains fine particles of mud which tends to settle down in the overhead tank.

Organizer: Centre for Science and Environment

Venue: Centre for Science and Environment, 41 Tughlakabad Institutional Area, New Delhi

Description:

Every summer, there is a big hue and cry for drinking water in our cities. Rapid urbanization and industrialization is leading to over exploitation and pollution of water resources. It leads to scarcity of water. On the other hand our water demands are increasing day by day.