The study presents the hydrological simulations for t he Nong Son catchment, a drainage area of the Vu Gia-Thu Bon basin in the Central Vietnam, by using t he NAM and XINANJIANG models. | Vietnam Journal of Mechanics, VAST, Vol. 30, No. 1 (2008) , pp . 43 - 54 COMPARISON OF TWO HYDROLOGICAL MODEL SIMULATIONS USING NAM AND XINANJIANG FOR NONG SON CATCHMENT Vu Van Nghi1 State Key Laboratory of Hydrology , Water Resources and Hydraulic Engineering, Hohai University, no . 1 Xikang Road, Nanjing 210098, China Dang Thanh Lam , Do Due Dung Southern Institute for Water R esources Planning, 271/3 An Duong Vuong Street, District 5, Ho Chi Minh City, Vietnam Abstract. The study presents the hydrological simulat ions for t he Nong Son catchment , a drainage area of t he Vu Gia-Thu Bon basin in t he Central Vietnam, by using t he NAM and XINANJIA NG models. Simulation results for both models show good agreement between calc ul ated and observed discharges at t he stream gauge. The overa ll water bala nce error is less than ±103, Nash-Sutcliffe efficiency R 2 above , and Pearson correlation coefficient r above i11 both model calibration an
