Byung Joo Lee Official, Jeonbuk Provincial Government, Hyojadong 3-Ga, Jeonju, Chonbuk 560-761, Korea.Professor, Dept. of Urban Engineering, Chonbuk National Univ., 664-14 Deokgindong, Jeonju, Chonbuk 561-756, Korea (corresponding author).Researcher, Dept. of Civil, Environmental, and Urban Engineering, Wonkwang Univ., 344-2 Shinyongdong, Iksan, Chonbuk 570-749, Korea.Professor, Dept. of Civil, Environmental, and Urban Engineering, Wonkwang Univ., 344-2 Shinyongdong, Iksan, Chonbuk 570-749, Korea.