1. a Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology , Douliou, Yunlin 640, Taiwan
2. b Department of Leisure and Recreation Management , Taiwan Shoufu University , Madou 721, Tainan , Taiwan
3. c Department of Safety Health and Environmental Engineering , National Yunlin University of Science and Technology , Douliou, Yunlin 640, Taiwan
4. d Water Resources Agency, Ministry of Economic Affairs , Taipei 106, Taiwan