1. Water Resources Management Research and Application Center (SUMER), Dokuz Eylul University, Tinaztepe Campus, Buca 35160, Izmir, Turkey Tel: +90 232 412 7246 Fax: +90 232 4531192 nilgun.harmancioglu@deu.edu.tr
2. Environmental Software & Services GmbH, Kalkgewerk 1, PO Box 100, A-2352, Gumpoldskirchen, Austria Tel: +43 2252 633 05 Fax: +43 2252 633 059 kurt@ess.co.at