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Impact assessment of watershed interventions under low rainfall situations in semi-arid Karnataka

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Title Impact assessment of watershed interventions under low rainfall situations in semi-arid Karnataka
Not Available
 
Creator A. Raizada
R.N. Adhikari ,
S. Kumar ,
S.L. Patil ,
D. Ramajayam ,
, M. Prabhavathi
, N. Loganandhan
B. Mondal
W. Muralidhar
 
Subject Coping, Economic viability, Ground water quality, Low rainfall, Watershed interventions
 
Description Not Available
Impact assessment of an integrated watershed development project located
in a low rainfall zone (417 mm) in semi-arid Karnataka was carried out.
Rainfall distribution during the project period (2008-15) was erratic with
four years out of seven receiving less than normal rainfall which led to
changes in cropping patterns. Share of area allocated to maize and sorghum
increased by 2.8% and 3%, respectively since these crops provide much
needed fodder. Due to in-situ soil moisture conservation practices like
bunding, yield of groundnut, sorghum, maize and onions in rainfed areas
increased by 19.4, 9, 16 and 2.8%, respectively. Recharge of groundwater due to
land based interventions in initial years led to an increase of 320% in number of
bore wells and irrigated area increased by 22%, but extraction of water
continuously along with low rainfall years led to failure of 75% of bore wells
by end of the project period. Water quality also deteriorated over time and
concentration of salts (Na , Mg and HCO ) increased. Direct employment of
5998 man days was generated over three years in different activities. Economic
analysis indicated that the project was viable even under low rainfall condition
and had a B:C ratio of 1.17 with an internal rate of return (IRR) of 11.92% and
payback period of 10 years.
Not Available
 
Date 2020-06-15T11:06:45Z
2020-06-15T11:06:45Z
2018-06-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/37152
 
Language English
 
Relation Not Available;
 
Publisher Not Available