1. Department
of Civil and Environmental Engineering, 121 Hudson Hall, Box 90287, Duke University, Durham, North
Carolina 27708, United States
2. Department
of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan
3. Department
of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
4. Department
of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States