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Augmentation of groundwater recharge and water quality improvement by water harvesting structures in the semi-arid Deccan

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Title Augmentation of groundwater recharge and water quality improvement by water harvesting structures in the semi-arid Deccan
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Creator R. N. Adhikari
A. K. Singh
S. K. N. Math
A. Raizada
P. K. Mishra
K. K. Reddy
 
Subject Check dam, groundwater, percolation tank, semi-arid regions, water quality.
 
Description Not Available
The effect of water harvesting structures on groundwater
recharge and water quality was evaluated in a
watershed situated in a semi-arid region in Andhra
Pradesh, India. Two percolation tanks and two check
dams with a total storage capacity of 4.209 ha m were
selected to assess their effect on groundwater recharge
and water quality within the influence zone of the
water harvesting structures. Daily rainfall, evaporation
and storage depth in structures were measured to
quantify percolation. Using rainfall–run-off relationship
with antecedent precipitation index as a factor,
complete water budgeting was carried out. Results
show that the threshold value of rainfall for ensuring
1 mm potential recharge is 61 mm. Potential recharge
is only 3% of annual rainfall received. Water quality
analysis revealed that except pH, all other water quality
parameters like electrical conductivity, sodium adsorption
ratio, residual sodium carbonate, total hardness,
nitrate and fluoride content reached desirable limits
in close vicinity (< 100 m) to the water harvesting
structures. Increased availability of groundwater led
to subsequent over-exploitation in below-normal rainfall
years and the number of bore wells increased by
three times.
Not Available
 
Date 2020-02-27T10:16:08Z
2020-02-27T10:16:08Z
2013-06-10
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33434
 
Language English
 
Relation Not Available;
 
Publisher Not Available