I have just seen a book, in which there is a chapter about your question. It may be useful for you:
Zhao, Y.; Li, S.; Zhang, Y. (2005) Early Detection and Monitorin of Drought and Flood in China using Remote sensing and GISIn: Sivakumar, Motha and Das, Natural Disasters and Extreme Events in Agriculture. Springer, Berlin.
1. Kourgialas, N.N., and G.P. Karatzas, “Flood Management and a GIS Modeling Method to assess the Flood Vulnerability - A Case Study”, Hydrological Sciences, Vol. 56(2), 212-225, 2011.