Research On The Entironment Impact Assessment Of Hydroelectric Station

With the rapid development of hydroelectric project, the influence of hydroelectric station on environment has increasingly been people's focus. The impact assessment of hydroelectric station is a complex work. It will involve many aspects of a compound ecosystem. At present it is an approach hotspot in theory field.The environmental problems of hydroelectric station are mostly embodied in those problems of terrestrial entironments and aqueous environments. This paper does some research about the impact assessment of hydroelectric station. The main contents of this thesis are shown as following.On the base of identifying the influence of hydroelectric project on environment, this paper sets up the estimation indexes system and gives the measure methods of correlative indexes from the aspects of terrestrial entironment integrality and sensitivity, aqueous environments, societal development and so on.Guiding by the basic theory of Landscape Ecology, combining RS and GIS, we discussed the impact assessment of hydroelectric station on terrestrial entironments based on Landscape Ecology. This paper uses landscape pattern indexes to quantitate the structure and function of ecosystem and gives illumination of their count methods.A depth-averaged 2-D plane flow-water quality numerical model was established on the base of aqueous character. The model is used to simulate and predict the impacts of hydroelectric station on aqueous environments. And the Osher algorithm, an approximate Riemann solver, is employed to estimate the normal fluxes across the interface of cell.At last, this paper takes the MASHAN hydroelectric station for example to carry out research. It assess the impact of the construction project on the region landscape spatial structure by landscape ecology and simulate the influences caused by this station on aqueous environments by model on the base of identifying the environment influencing factors system. Show as a result, MASHAN hydroelectric station won't cause big influence upon terrestrial entironment integrality; MASHAN hydroelectric station will change the speed of flow in zhushan lake. The quality of zhushan lake will be influencd gently.