Projecting the impact of human activities and climate change on water resources in the transboundary Sre Pok River Basin

Pragya Pradhan, Trang Thi Huyen Pham, Sangam Shrestha, Ho Huu Loc*, Edward Park

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

This study aims to project the compound impacts of climate change and human activities, including agriculture expansion and hydropower generation, on the future water availability in the Sre Pok River Basin. The five regional climate models (RCMs): ACESS, REMO2009, MPI, NorESM, CNRM were selected for the future climate projection under two scenarios, i.e., RCP 4.5 and RCP 8.5. Our results reveal that the future annual rainfall is expected to decrease by 200 mm, whereas the average temperature is expected to increase by 0.69 to 4.16 °C under future scenarios. The future water availability of Sre Pok River Basin was projected using soil and water assessment tool (SWAT). Next, the CROPWAT model was used to examine the irrigation water requirement and the HEC-ResSim model to simulate the hydropower generation of Buon Tuar Sarh reservoir. The future simulation indicates the decrease in future water availability, increasing demand for irrigation water and decreases in hydropower generation for the future periods. The irrigated areas are increased from 700 to 1500 ha as per the provincial development plan. This study also examines the present and future drought conditions of Sre Pok River via streamflow drought index (SDI). Our results expect to contribute toward supporting the planning and management of water resources for agriculture and to efficiently cope with drought conditions in the studied basin and beyond.

Original languageEnglish
Article number26
JournalClimatic Change
Volume172
Issue number3-4
DOIs
Publication statusPublished - Jun 2022
Externally publishedYes

Keywords

  • Climate change
  • Human activities
  • SDI
  • Sre Pok
  • SWAT
  • Transboundary basin

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