Difference Analysis Of Huangjinping Hydropower Station Hydraulic Ecological Characteristics Between The Front And Rear Of Dam Construction

In this paper, according to the basic theory of spatial structure of river water system, the establishment of a reduced river reaches located in Dadu River Hydropower Huangjinping river space structure matrix analyzed in different periods of reduced river reaches three hydraulic cross section of operating conditions, and the dam before and after reduced river reaches the hydraulic characteristics between ecology were studied. The results show that after running Huangjinping station, reduced river reaches the average annual flow velocity, depth and width of water surface were decreased to different extent. Water and river water system operating conditions and spatial structure and river hydro-ecological characteristics change significantly, likely will be the river fish and other organisms to survive and thrive impact.We selected three kinds of local treasure in research in protecting fish as indicators of biological assessment minus the effect of water river water system operating conditions and spatial structure of the river’s ecological system. Studies have shown that the dry season flow reduced river reaches substantially reduced, before the dam, the river water after significant changes in the ecological characteristics of indicators of fish survival, reproduction, feeding and wintering habits require a significant impact. Study of fish natural water ecological habits index as a benchmark, the use of constructed flood, feeding and breeding to improve river flow rate and depth of a pile of gravel, sand and gravel to keep the riverbed gradation balance, etc. Save water river reconstructed spatial structure, restoration Save water ecological characteristics of river water.Research results show that for the dam downstream river spatial structural changes reduced river reaches, the dam may be on the basis of the former, the system conditions and operating system differences analysis, can be used to build engineering measures to restore the original water system spatial structure, protecting natural aquatic ecosystems river.