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