TAILIEUCHUNG - Báo cáo " Applying SWAT model to simulate streamflow in Ben Hai River Basin in response to climate change scenarios "

SWAT model was used to assess the impacts of climate change on the streamflow of Ben Hai River Basin. The daily streamflow for 1979 - 1996 and 1997 - 2006 was used to calibrate and validate the SWAT model, respectively. Nash efficiency values for the daily comparison were for the calibration period and for the validation period. Three scenarios were analyzed relative to the baseli ne with 28-year time series. A doubling of the atmospheric C02 content to 660 ppm (while holding other climatic variables) resulted in a increase in average annual streamflow while the average annual. | VNU Journal of Science Earth Sciences 25 2009 161-167 Applying SWAT model to simulate streamflow in Ben Hai River Basin in response to climate change scenarios Nguyen Thanh Son Nguyen Y Nhu College of Science VNU Received 01 December 2009 received in revised form 9 December 2009 Abstract SWAT model was used to assess the impacts of climate change on the streamflow of Ben Hai River Basin. The daily streamflow for 1979 - 1996 and 1997 - 2006 was used to calibrate and validate the SWAT model respectively. Nash efficiency values for the daily comparison were for the calibration period and for the validation period. Three scenarios were analyzed relative to the baseline with 28-year time series. A doubling of the atmospheric co2 content to 660 ppm while holding other climatic variables resulted in a increase in average annual streamflow while the average annual streamflow changes of 75 and 190 were predicted for two periods of B2 and A1FI scenarios respectively. The seasonal variability was predicted to be high for the individual climate change scenarios and in specific months the streamflow variability was also large between scenarios. The results also show that the hydrology of Ben Hai River Basin is sensitive to climate changes. Keywords . SWAT climate Change Soil and Water Assessment Tool hydrologic model water resources. 1 Introduction The changes in hydrologic cycle due to the global climate change conditions are very diverse and complex. It has an effect on the water resources and the efficiency of water resources management etc. Understanding these impacts for all aspects of water resources is very important for future water resources management. In the past a great amount of work on climate change has been done from different viewpoints. Quite a lot of investigators studied Corresponding author. Tel. 84-4-38584943 E-mail sonnt@ the impact of climate change on water resources and hydrological cycle on groundwater soil moisture

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