SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Adaptation strategies for rainfed rice water management under climate change in Songkhram River Basin, Thailand 
Authors:Boonwichai, S., S. Shrestha, P. Pradhan, M.S. Babel and A. Datta 
Volume (Issue):12(6) 
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URL (non-DOI journals): 
Broad Application Category:hydrologic only 
Primary Application Category:rice paddy dynamics and/or production 
Secondary Application Category:climate change 
Watershed Description:13,215 km^2 River, a tributary of the Mekong River that drains parts or all of Sakon Nakhon, Nakhon Phanom, Bung Kan, Nong Khai, and Udon Thani Provinces in northeast Thailand. 
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Abstract:This study investigates the potential impacts of climate change on water resources and evaluates adaptation strategies on rainfed rice water management under climate change scenarios in the Songkhram River Basin, Thailand. The Soil and Water Assessment Tool (SWAT) model was used to project the future water availability under climate change scenarios for the period of 2020–2044. Future annual water availability is expected to remain unchanged due to unchanged future rainfall but expected to reduce from June to November due to changes in seasonal rainfall. The effects of supplying irrigation water to reduce the impact of climate change and increase rainfed rice production were evaluated. To increase the rice production by 15%, it is proposed to construct a reservoir with a capacity of below 65 MCM in each of the 15 sub-basins to fulfill the irrigation water requirements during the rainfed rice season. Alternatively, adaptation at the farm scale can be implemented by constructing ponds with a capacity of 900 m3 to store water for 1 ha of rice field to meet the potential rice yield during the non-rainfed rice season. The results of this study are helpful to policymakers in understanding the potential impacts of climate change and the formulation of adaptation strategies for water and rice sectors in the basin. 
Keywords:adaptation, irrigation water requirement, SWAT model, water availability