1. Department of Global Environment, School of Environment, Keimyung University, 203 Osan Hall, 1095 Dalgubuldearo, Dalsegu, Daegu, 704-701, S. Korea
2. Water Business Division, Woojin Construction and Engineering, 76 W-Tower, Baekja-ro, Gyeongsan-si, Gyeongsangbuk-do, S. Korea