1. Dep. of Environmental Engineering; Pusan National Univ.; Jangjun-dong san 30 Kumjungku Pusan 609-735 Korea (ROK)
2. Disaster Prevention Research Division; National Disaster Management Research Institute; 365, Jongga-ro, Jung-gu Ulsan 44538 Korea (ROK)
3. Dep. of Civil Engineering; Daegu Univ.; Gyeongsan Gyeongbuk Korea (ROK)
4. Dep. of Civil Engineering; Univ. of Texas; Arlington TX 76019
5. Dep. of Agricultural and Rural Engineering; Chungnam National Univ.; Deahak-ro 99, Yuseong-gu Daejeon 305-764 Korea (ROK)