1. Ph.D. Student, State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai Univ., Nanjing, China 210098; Lecturer, Civil Engineering Dept., Kwame Nkrumah Univ. of Science and Technology, PMB, Kumasi, Ghana. (corresponding author).
2. Professor, State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai Univ., Nanjing, China 210098.
3. Lecturer, Geological Engineering Dept., Kwame Nkrumah Univ. of Science and Technology, PMB, Kumasi, Ghana.
4. Principal Research Scientist, Council for Scientific and Industrial Research, Water Research Institute, P.O. Box M. 32, Accra, Ghana.
5. Research Scientist, Council for Scientific and Industrial Research, Water Research Institute P.O. Box M. 32, Accra, Ghana.