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Modelling the impact of climate change on groundwater resources in central Punjab

KrishiKosh

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Title Modelling the impact of climate change on groundwater resources in central Punjab
award Winning Theses
 
Creator Samanpreet Kau
 
Contributor K.G. Singh
 
Subject bacteria, livestock, diseases, biological phenomena, sampling, antibiotics, pathogens, animal husbandry, polysaccharides, byproducts
 
Description AWT- 194
A study was planned to assess the impacts of climate change on groundwater resources in
Ludhiana district under PRECIS A1B climate change scenario by linking the outputs of climate,
soil
-
water
-
vegetation and groundwater models using GIS. Bias correction of
climate data was
done by correction functions, developed using modified difference, approach at daily time scale
for rainfall and at monthly time scale for T
max
and T
min
.
The methodology consists of development
of simulation zones by overlaying soil, drai
nage, canal and landuse thematic maps in GIS and
estimating water balance components using CropSyst and well defined norms.
The groundwater
draft for individual simulation zones was computed on the basis of landuse, irrigation requirement
and rainfall cond
itions.
The spatial
distributions of recharge and groundwater draft were
mapped
to GIS and w
ere
provided as input to groundwater model.
The results showed that temperature
and rainfall would be increased by 2.4°C, 315 mm in MC (2021
-
2050); and 5.1°C and 46
5 mm in
EC (2071
-
2098)
,
respectively. During
k
harif
season increase in RF would be 28.0% in MC and
52.0% in EC compared to that in PTS (1971
-
2010). The corresponding values during
rabi
would
be 82.3% and 88.6%, respectively. As a consequence of increased p
recipitation, the irrigation
requirements in MC and EC would decrease by 46% and 45% during
kharif
; and 21% and 34% in
rabi
, respectively. However, the potential groundwater recharge would be reduced by 23.1 and
4.2 per cent in
kharif
, and increased by 39.
1 and 79.6 per cent in
rabi
during MC and EC
,
respectively.
The average groundwater levels would decrease by 2.2 m in 2050
and
increase
by
4.8 m in 2098
,
compared to base year of June 2000
.
The results presented here should be
interpreted as trends and
not as accurate quantitative predictions of the hydrological changes as
there are numerous sources of uncertainties associated with climate change prediction.
 
Date 2017-01-06T10:04:35Z
2017-01-06T10:04:35Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94772
 
Format application/pdf