Chunhung Wu¹、*YI-PING CHEN²、Youda Jhong³ (1.Associate Professor, Department of Water Resources Engineering and Conservation, Feng Chia University, Taiwan (R.O.C.)、2.Postgraduate, Department of Water Resources Engineering and Conservation, Feng Chia University, Taiwan (R.O.C.)、3.Assistant Professor, Department of Water Resources Engineering and Conservation, Feng Chia University, Taiwan (R.O.C.))