1. PhD, Dept. of Environmental Engineering, Peking Univ., Beijing 100871, China; School of Life and Environment Sciences, Central Univ. for Nationalities, Beijing, China.
2. Professor, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Dept. of Environmental Engineering, Peking Univ., Beijing 100871, China.
3. Professor, Dept. of Civil Engineering, Univ. of Missouri–Rolla, Rolla, MO 65409.