1. Associate Professor, Dept. of Leisure and Recreation Management, Taiwan Shoufu Univ., Madou, Tainan City 72153, Taiwan (corresponding author).
2. Associate Professor, Dept. of Civil and Water Resources Engineering, National Chiayi Univ., No. 300 Syuefu Rd., Chiayi City 60004, Taiwan.
3. Graduate Student, Dept. of Civil and Water Resources Engineering, National Chiayi University, No. 300 Syuefu Rd., Chiayi City 60004, Taiwan.