A NEW BEGINNING

 






A rich harvest

IN FOCUS

On the right track?
Groundwater or poison?
Punjab, ready for desi solutions
Saga of tanks


CAMPAIGN

Ways to destroy
Squatters or owners?
VIPs strangling Dal
Restoring Bis Hazari
Lakes in News

WATER LITERACY

For water security
The facilitator
Let us try this out?
Water carnival


INITIATIVE

Sabdoo, surging ahead
Pioneering work
Reasserting rights
Haryana documents
Mission possible


FACE TO FACE


JAL BIRADARI

Common sense, makes sense
Unflinching faith


NEWS FROM GUJARAT

Jal bachao yatra
Checking salt ingress
Water accounting


NEWS FROM CHENNAI

Legally armed
Cultivating temple tanks
Syndicate residency’s endeavour Optimising benefits


JAL YODHAS

P K Senapati
Surinder Bansal
Shree Padree
Anil Rana
M N Mitra


CSE'S LATEST DESIGNS

TECHNOLOGY

Fog collectors
Techno tit bits


FUNDING AGENCY

CLASSROOM

WATER WISDOM

NEWS FROM ABROAD

South Africa: Water apartheid
Kenya:
Drought busting
Japan: Water wizards
Turks & Caicos Islands:
A unique system
Nepal: Spouts return

WATER IN NEWS

REDERS SPACE

CSE'S LAKENET

BOOK/DOCUMENTS

VISUAL WATCH

WEB INFO

NOTICE BOARD

GLIMPSES FROM DTE

EVENT


   
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Vol. 4                                     No. 6              December 2002- January 2003

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A rich harvest

CSE monitors model projects: Startling results

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Improving water tables at Model Projects

Its time to take stock of the performance of the model projects inaugurated in Delhi by CSE in August 2002. What has the impact of rainwater harvesting (RWH) been on the quantity and quality of the groundwater before and after monsoon? Results based on regular monitoring and independent analysis clearly indicates a spectacular improvement. (See graph and table)

22 water samples from 11 different sites were collected and tested for physicochemical flutuations at CSE’s Pollution Monitoring Lab. The sites including Jamia Hamdard University, Janki Devi Memorial College, Mira Model School, The Shri Ram School and Panchsheel Club, School and Colony. These are the five model projects designed by CSE to reaffirm the potential of urban RWH.

A substantial increase in the groundwater levels clearly reinstates the capacity of RWH in plugging the current gap of more than 310 MGD between water demand and supply. Significantly, in 91 per cent of the samples there is a fall in the level of dissolved solids. There is also a decline in the acidity, nitrate, nitrite, chromium and flouride contents.

Rainwater is one of the purest sources of water available.So, if the water table rises after monsoon due to RWH, the quality too improves with the dilution of freshwater.

For details:
Eklavya at eklavya@cseindia.org
Srinivasan at rksri@cseindia.org;
Tel: 26081110 / 24 Ext 219

The water quality index

Indicator Jamia Ham-
dard
Shri Ram School Janki Devi Mira Model Panch-sheel
  Pre–M Post–M Pre–M Post–M Pre–
M
Post–
M
Pre–
M
Post–
M
Pre–
M
Post–
M
pH 7.11 7.45 7.26 7.73 6.32 7.19 7.26 7.73 6.59 7.39
Nitrate
( Mg / l)
4.49 2.35 3.53 2.43 20.6 3.91 3.53 2.43 59.5 3.26
Turbidity
(NTU)
2.1 1.2 3.83 2.62 2.83 0.66 14.98 0.36
Acidity
( Mg / l)
18 0 20 0 34 0 20 0 50 0
Calcium
( Mg / l)
64 21.64 52 32 40 32 268 48
Magnesium
( Mg / l)
88 32 174 50 346 159.9 90 71.9
TDS (ppm) 595 517 724 692 2140 1550
Hardness
( Mg / l)
160 54 864 100 218 120
Oil & grease (ppb) 30 20 40 15 20 10 40 15 30 17
Chloride
( Mg / l)
131 75.8 456 417
Chromium (Mg / l) 0.0175 0.003 0 0.01 0 0.003 0
Iron( Mg / l) 0.082 0 0.082 0
Note: Pre – M = Pre Monsoon; Post – M = Post Monsoon;

 

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