1. a Department of Environmental Health and Engineering, Johns Hopkins University, Baltimore, MD, USA
2. b Department of Hydraulic and Ocean Engineering, National Cheng Kung University, 1 University Road, Tainan, Taiwan, R.O.C.
3. c Department of Resources Engineering, National Cheng Kung University, 1 University Road, Tainan, Taiwan, R.O.C.
4. d Geotechnical Engineering Research Center, Sinotech Engineering Consultants, Inc., 280 Xinhu 2nd Rd., Neihu Dist., Taipei, Taiwan, R.O.C.
5. e Department of Bioenvironmental System Engineering, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei, Taiwan, R.O.C.