DEVELOPMENT OF DUALISTIC MODEL FOR INTEGRATED WATER RESOURCES MANAGEMENT IN THE HAIHE RIVER BASIN

The dualistic model which reflects "natural - artificial" dualistic characteristics of water cycle is developed to support integrated management of water and environment in the Haihe river basin (320000 km(2)) in North China. The dualistic model is established by coupling a distributed hydrological and water quality model (WEP-L), a water resources allocation model (ROWAS) and a multi-objective decision-making analysis model (DAMOS). Approach of two-hierarchy coupling is adopted for the three models. Hydrological simulation units and planning and management units are subdivided by taking full consideration of two kinds of factors, i.e., natural precipitation-runoff relation and river hydraulics, and human activities of land use and water resources utilization. The Haihe river basin is subdivided into 11752 hydrological simulation units and 125 planning and management units, and simulations of 50 years from 1956 to 2005 are carried out. The result shows that the simulation accuracy of established dualistic model is acceptable. Finally, a preliminary application of the model as a scenario analysis tool is introduced.