1. Professor, Dept. of Water Resources Engineering and Conservation, Feng Chia Univ., Taichung City, Taiwan 40724, ROC.
2. Associate Professor, Dept. of Land Management and Development, Chang Jung Christian Univ., Tainan City, Taiwan 71101, ROC (corresponding author).
3. Researcher, Dept. of Water Resources Engineering and Conservation, Feng Chia Univ., Taichung City, Taiwan 40724, ROC.