[1] Civil Engineering Department, FTSP, Kampus ITS, Sukolilo, Surabaya 60111, Indonesia
[2] UFMG/ERH, Avenida do Contorno 842, 30110-060 Belo Horizonte, MG, Brazil
[3] Department of Water Resources, Inst. Water Rsrc. Hydropower Res., 20 Chegongzhuangxilu, PO Box 366, Beijing 100044, China
[4] CEMAGREF, Water Quality and Hydrology Division, BP44, F-92163 Antony, France