Abstract:

 The Three Gorges Reservoir is also typical river reservoir after impoundment,and its general movement characteristics of flow and water quality conform to the movement principle of onedimensional flow and water quality.Aiming at general movement characteristics of flow and water quality in the Three Gorges Reservoir Area (TGRA),the onedimensional flow and water quality model is used to simulate the flow and water quality in the TGRA.With onedimensional flow and water quality model as the core,a serial of model services are developed and disseminated through internet using the WebServices technique.Based on those model services,the numerical simulation platform of main stream water quality within TGRA is established using mature WebGIS and RIA Flex techniques.The platform realizes the numerical simulation of the main stream flow velocity field and concentration field in TGRA,including the spatial and temporal simulation of velocity,flow,water level and pollutant concentration in every computation crosssection.Taking the mainstream QingxichangShilipu section in TGRA as case,the research simulates the flow and water quality and validates the simulation result using simultaneous observation data of hydrology and water quality in field.The result shows that the platform can be well used in the flow and water quality simulation.The platform provides a good tool to the study on the overall characteristics of the contaminant transport and diffusion,and provides the technique support to the government and local departments in water environment decision making as well