Evaluating Surface Water-groundwater Interactions in Consequence of Changes in Climate and Groundwater Extraction

Chanchai Petpongpan, Chaiwat Ekkawatpanit (), Ryan T. Bailey, Duangrudee Kositgittiwong and Phayom Saraphirom
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Chanchai Petpongpan: King Mongkut’s University of Technology Thonburi
Chaiwat Ekkawatpanit: King Mongkut’s University of Technology Thonburi
Ryan T. Bailey: Colorado State University
Duangrudee Kositgittiwong: King Mongkut’s University of Technology Thonburi
Phayom Saraphirom: Khon Kaen University

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2022, vol. 36, issue 14, No 21, 5767-5783

Abstract: Abstract This study explores spatio-temporal patterns of surface water-groundwater interactions in the Yom and Nan River basins, a vulnerable and essential agricultural region in northern Thailand, under various future climate conditions. The SWAT-MODFLOW model performs the coupled simulation of surface/subsurface hydrological processes in the watershed, with projected climate conditions from the three Global Climate Models (MIROC5, CNRM-CM5, and MPI-ESM-MR) under the minimum and maximum Green House Gas emission scenarios, represented as the RCPs 2.6 and 8.5. The results demonstrate that, in the near future (2026–2045) under the two scenarios, a raised air temperature at 0.5–1.0 °C with a 2–16% increment of annual rainfall cause a 7–20% decrease in groundwater recharge from surface water percolation, followed by a 11–21% depletion of groundwater flow to river, while aquifer recharge from the river change negligibly. In the intermediate future (2051–2070) and far future (2076–2095), changes in surface water-groundwater interactions under RCP 2.6 are rather similar to the near future because of insignificant differentiation in climate conditions. Whereas, under RCP 8.5, annual rainfall increases by 26% and produces 4–14% increments of groundwater recharging and groundwater discharge to streamflow, while river seepage increases by 1–18%. These provide key insights into northern Thailand watershed systems to deal with future impacts of climate change on water supply. Graphical Abstract

Keywords: Surface water-Groundwater interaction; Climate change; Groundwater extraction; SWAT-MODFLOW; Thailand (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11269-022-03334-7

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