1. Postdoctoral Researcher, Dept. of Hydraulic Engineering, Tsinghua Univ., China.
2. Associate Professor, Dept. of Civil Engineering, Univ. of Engineering & Technology, Lahore, Pakistan.
3. Associate Professor, Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong Univ., China (corresponding author).