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Numerical simulation to assess potential groundwater recharge and net groundwater use in a semi-arid region

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Title Numerical simulation to assess potential groundwater recharge and net groundwater use in a semi-arid region
Not Available
 
Creator Ch. Jyotiprava Dash
A. Sarangi
D. K. Singh
P. P. Adhikary
 
Subject HYDRUS-1D. Irrigation . Moisture dynamics . Net groundwater use . Potential recharge . Root zone . Water flux
 
Description Not Available
Accurate assessment of deep percolation (potential
groundwater recharge) under different field crops
is essential for sustainable management of scarce water
resources and proper planning of crop rotation in irrigated,
semi-arid regions of the world. The potential
recharge from commonly grown field crops in semiarid
Indo-Gangetic Plain (IGP) of India was estimated
using HYDRUS-1D model, where, irrigation, evapotranspiration,
and soil moisture dynamics were simulated.
Simultaneously, net groundwater use by different
cropping patterns was also calculated. Among the hydraulic
parameters, n was found most sensitive for water
percolation. During rainy season, 293.8 and 159.1 mm
water was percolated below the root zone of cotton and
soybean, respectively, which accounted for 39.4 and
32.9% of the water input. During winter season, 66.8
and 30.3 mm water was percolated below the root zone
of winter maize and mustard, respectively, accounting
for 20.5 and 10.6% of added water. It was observed that
net groundwater use was positive for cotton, soybean,
and summer maize with the values of 168.8, 159.1, and
18.0 mm year−1, respectively, and negative for rice,
wheat, winter maize, and mustard. For the eight most
important cropping patterns of semi-arid IGP, the net
groundwater use was negative and varied between −
4.4 mm year−1 for cotton-maize and −423 mm year−1
for rice-wheat.With these cropping patterns, the overall
rate of decline of groundwater was 231 mm year−1. It
was found that maize-wheat and soybean-wheat
cropping patterns consume much less water than ricewheat
cropping pattern and therefore are suitable to
arrest the declining trend of groundwater in semi-arid
IGP of India.
Not Available
 
Date 2020-07-28T10:05:13Z
2020-07-28T10:05:13Z
2019-05-17
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/38336
 
Language English
 
Relation Not Available;
 
Publisher Not Available