SWAT Literature Database for Peer-Reviewed Journal Articles

Title:The impact of Para rubber expansion on streamflow and other water balance components of the Nam Loei River Basin, Thailand 
Authors:Wangpimool, W., K. Pongput, N. Tangtham, S. Prachansri and P.W. Gassman 
Year:2017 
Journal:Water 
Volume:9(1) 
Pages: 
Article ID:
DOI:10.3390/w9010001 
URL (non-DOI journals): 
Model:SWAT 
Broad Application Category:hydrologic only 
Primary Application Category:land use change 
Secondary Application Category:hydrologic assessment 
Watershed Description:3,912 km^2 Nam Loei River, which is located primarily in Loei Province in northeast Thailand. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:At present, Para rubber is an economical crop which provides a high priced product and is in demand by global markets. Consequently, the government of Thailand is promoting the expansion of Para rubber plantations throughout the country. Traditionally, Para rubber was planted and grown only in the southern areas of the country. However, due to the Government’s support and promotion as well as economic reasons, the expansion of Para rubber plantations in the northeast has increased rapidly. This support has occurred without accounting for suitable cultivation of Para rubber conditions, particularly in areas with steep slopes and other factors which have significant impacts on hydrology and water quality. This study presents the impacts of Para rubber expansion by applying the Soil and Water Assessment Tool (SWAT) hydrological model on the hydrology and water balance of the Nam Loei River Basin, Loei Province. The results showed that the displacement of original local field crops and disturbed forest land by Para rubber production resulted in an overall increase of evapotranspiration (ET) of roughly 3%. The major factors are the rubber canopy and precipitation. Moreover, the water balance results showed an annual reduction of about 3% in the basin average water yield, especially during the dry season. 
Language:English 
Keywords:hydrologic balance; SWAT model; land use change; evapotranspiration; plant parameters