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Cumulative Impact Study of Cascade Reservoir on River Ecological Factors

Author: WangBo
Tutor: HuangZuo
School: Yangtze River Scientific Research
Course: Hydraulics and River Dynamics
Keywords: Cumulative effect of Cascade reservoirs Water temperature Ecological flow River habitat factor
CLC: X826
Type: Master's thesis
Year: 2008
Downloads: 341
Quote: 3
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Abstract


Rich hydropower resources in China , has been built in the planning and construction of the cascade development project , hydrology, water quality , sediment caused by the cascade reservoirs river eco - environmental impact has also been a lot of attention . The cascade development background , cascade reservoirs densely arranged , at all levels of the reservoir on the river habitat factor will occur cumulative , river habitat factor in the ecological flow critical group (pulsations , floods , low flow and extreme low- flow ) and water temperature by the accumulation of cascade reservoirs especially obvious , is the focus of this study . This article widely refer to the cumulative impact at home and abroad and cascade reservoirs on the river habitat impacts literature , to understand the research trends at home and abroad . Cumulative current status of the lack of impact of the study definitions controversial Japanese research methods , the cumulative impact is defined , and the cumulative effect of the research - based approach in three stage of application integration , including the identification method \methods \group process indicators and formulated to be described in order to build a cascade reservoirs on the evaluation of the cumulative effect of the critical group of ecological flow ; based on the analysis of cascade reservoir water temperature mechanism constructed reservoir area vertical two-dimensional k-ε -range water temperature model for reservoir water temperature simulation ; complex hydrodynamic process is simplified for the average flow rate , considering both rivers along tributary temperature change machine rational dam downstream river water temperature estimation model ; Xiluodu - Xiangjiaba cascade as an example application . The cumulative effects of resource development, construction and material production of human activities on the natural disturbance time cumulative impact of the synergy formed on the role and space than ever considering studies focus more on the actual occurrence of the impact of a single project . In this paper, the cumulative effect of the theory from the model to the application of key ecological flow and water temperature caused by cascade reservoirs made ??some preliminary research results .

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > Biological assessment, ecological assessment
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