ECONOMIC ANALYSIS OF RAINWATER HARVESTING ON WATERSHED BASIS
Loading...
Date
2009-07-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The study aimed at analyzing supply augmentation and demand
management o f groundwater, economics o f water harvesting for
groundwater recharge and productivity and profitability o f groundwater use
in Thotli m icro-watershed in Kolar taluk of Kolar District. Both secondary
and primary data were collected for analysis. Prim ary data was collected
from all the watershed beneficiaries possessing borewells (90) with the help
of pre-tested and structured schedule for the year 2007-08.
The findings of the study reveals that after the watershed programme,
there has been im provem ent in the borewell yield by 24 per cent. The total
annual groundwater draft was 70.63 Ha.m, o f which, 98 per cent has been
put to agriculture use like perennial crops (63 per cent) and annual crops
(35 per cent). The total annual groundw ater recharge was to the tune of
66.93 Ha.m, where bulk o f the recharge w as through precipitation (63 per
cent). The recharge from water harvesting structures (WHS) accounted for
11 per cent. The groundwater draft exceeded the recharge leading to a
negative balance o f 3.73 Ha.m. Cost incurred to recharge one acre inch of
groundwater through WHS was Rs.114. Cost incurred to impound per m3 of
water in farm pond, recharge pit, and field bund was Rs. 1.3, Rs.1.6 and
Rs.3 respectively. Investm ent analysis o f water harvesting structures
indicated that returns per rupee o f investment on farm pond, recharge pit,
and field bund (per acre) w as Rs.1.8, Rs.1.78, and Rs.1.39 respectively.
After the watershed programme there was substantial increase in
productivity and profitability o f the m ajority of the crops. Marginal
productivity o f groundwater use was high in high value crons like tomato
(3.99) and low in low value crops like Finger millet (0.46).
Description
Keywords
null