Nhi Thi Hong Vuong¹, Tso-Ren Wu¹, Chun-Yu WANG², Chia-Ren CHU², Chun-Wei Lin¹ and Mei-Hui Chuang¹, (1)NCU National Central University of Taiwan, Graduate Institute of Hydrological and Oceanic Sciences, Jhongli, Taiwan, (2)NCU National Central University of Taiwan, Department of Civil Engineering, Jhongli, Taiwan