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An assessment of future climatic and anthropogenic impacts on the hydrological system of a semi-arid catchment

OAR@ICRISAT

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Relation http://oar.icrisat.org/12818/
https://onlinelibrary.wiley.com/doi/full/10.1002/ird.3018
https://doi.org/10.1002/ird.3018
 
Title An assessment of future climatic and anthropogenic impacts on the hydrological system of a semi-arid catchment
 
Creator Nune, R
Western, A W
George, B A
Gummadi, S
Pasupuleti, S
Ragab, R
Dixit, S
 
Subject Irrigation
Climate Change
Water Resources
 
Description Climate and catchment characteristics, particularly land and water use and management, may vary according to the population growth rate, future food habits and water demands. Three climate simulations corresponding to the Intergovernmental Panel on Climate Change, Special Report on Emissions Scenarios (A1B) were downscaled using the ‘Providing Regional Climates for Impact Studies’ (PRECIS) for the period 1961–2098, and bias correction was performed using the quantile mapping (QM) method. A semi-distributed integrated model (Modified Soil and Water Assessment Tool, SWAT) was used to predict the impacts of dynamic changes in catchment characteristics in the Himayat Sagar (HS) catchment and the effects of future climate change on future streamflow and groundwater storage. Simulations predicted that if this trend continues in the future, future climate and anthropogenic changes will lead to a more than 50% reduction in streamflow and a 50% increase in actual evaporation in the HS catchment. This would reduce groundwater storage to a depth of 15 m compared to current conditions, and by the end of the century, there would be no contribution from the base flow to the streamflow. Overall, unless current policies are modified to stabilize land and water management practices, anthropogenic changes will have greater importance than climate change.
 
Publisher Wiley
 
Date 2024-09-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12818/1/Irrigation%20and%20Drainage_1-27_2024.pdf
Nune, R and Western, A W and George, B A and Gummadi, S and Pasupuleti, S and Ragab, R and Dixit, S (2024) An assessment of future climatic and anthropogenic impacts on the hydrological system of a semi-arid catchment. Irrigation and Drainage. pp. 1-27. ISSN 1531-0353