Statistical comparisons between the
simulated results and the observed data for the calibration year gave a reasonable agreement for both monthly
coefficient of determination (r2) and Nash-Sutcliffe Coefficient (E) within ranges of 0.77-0.88 and 0.55-0.79,
whereas the validation results showed lower values of r2 and E ranging from 0.23-0.77 and -7.98-0.66. Overall,
the SWAT model has the capability to predict stream flows within the Chi River Subbasin II in northeast
Thailand.