The Establishment and Historic Mission of Hydroecology

Abstract：The background and evolution of hydroecology formation were introduced,as well as its connotation and definition.Hydroecology is a science of the interrelationship between hydrology and ecology and the various united systems of them——various hydroecology systems.Hydroecology was discussed and it performs as hydroecology system actually.Hydroecology system was combined by hydrology system and ecology system.Thus,it is inevitable that ecological elements includes water factor,hydrology system influences and is companied by relevant ecology system and the variation of ecology system impacts hydrology system.The interaction and interdependence of two systems require taking hydrological function into account on ecological researches,vice versa,it is necessary to take ecological conditions into consideration on hydrological studies.The oasis,terrace and irrigation district were took as examples to discuss the hydroecology systems on different ecological and hydrological conditions.Hydroecology will develop on the bases of ecology,hydrology,potamology,limnology,hydrogeology,hydraulic architecture and farmland water conservancy,motivate new leap of recognizing nature and promote advances of water conservancy and ecological construction.