Abstract:

With strong impacts from human activities,hydrological cycles are exhibiting a dualistic structure (natural and artificial). As a result,the functionality of water ecosystem service also shows dualistic characteristics,which poses a challenge to research on quantitative assessment and driving mechanism of service functionalities.Based on analysis of connotation of dualistic hydrological cycle and water ecosystem service functionalities,and present research situation of home and abroad,problems in recent studies are identified.Besides,driving mechanism of water ecosystem service functionalities caused by natural water cycle and accompanying process,as well as social water cycle process,are analyzed.And a quadrilateral computation pattern with single process and single objective was put forward.Based on multiprocess and multifeedback characteristic of dualistic water cycle crossimpact on water ecosystem service functionalities,service assessment index system under dualistic hydrological cycle mode applied to different types of water ecosystem,such as river,reservoirand wetland,was presented.Combined with existing problems of present research,it is put forward that research on assessment method and driving forces needed strengthening