The water receiving areas of the Phase I Project of the Mid-route of South-to-North Water Transfer Project are selected to be the research objects,and then 112 counties and districts in those areas are taken as the units for the analyses concerned;for which the eco-hydrological regionalization is made.

This paper introduced the conception, principles, and multidisciplinary characteristics of hydroecology, summarized the research progress in hydroecological modeling of wetlands, and discussed the problems existed in present hydroecological modeling, such as scale confliction, lack of efficient validation methods, and indeterminati.

Internationally, although many studies have been carried out, especially in the United States, Europe and Canada, but there are still divergences for some basic problems, such as the definition of eco-hydrology.

Under the background of global warming,the fragile ecosystem of permafrost regions attracts increasing attention of the researchers on eco-hydrology,global climate change and engineering construction increasingly.