Analysis And Evaluation Of Heavy Metal Elements In The Sediment Of The Upper Stream Of Yuetan Reservoir

This paper takes the water quality and sediment of the upper channel of Yuetan Reservoir as the main detection and research objects,and carries out comprehensive pollution detection and research of heavy metal elements.In this paper,57 sampling points are arranged along the upstream and downstream of Yuetan Reservoir.The upstream water quality and the content of heavy metals such as Cr,Pb,As,Cd,Cu,Zn,Hg,and Ni in the sediment of the river are comprehensively detected and analyzed.Heavy metal pollution assessment was conducted on the bottom sediment of the upstream channel of Yuetan Reservoir.According to the detection results of the samples at the sampling point,the detection results of heavy metals in all water samples have basically reached the level I standard of Environmental Quality Standards for Surface Water(GB3838-2002).Heavy metal pollution from Xinguang Factory's sewage outlet to Wangcunhe River inflow rate is mainly concentrated in Xinguangchang sewage outlet and Wangcunhe Huikou Wangcunhe River inflow rate.Different sections have different levels of heavy metal pollution.Wangcun River Lanxi Road and Bridge The section from the south side of the yard to the Wangcun River inflow rate is heavily polluted.The upstream of the Xinguang Factory pond outlet to the Xinguang Factory discharge port and the Wangcun River junction are slightly polluted;the Xikou Hydropower Station to the reservoir dam site Heavy metal pollution is mainly concentrated in two rivers,10 m upstream from Changhui Outlet to Changhui Outlet(Changhui Outlet Section)to 500 m downstream from the intersection of Changhui Outlet and Rate Water,and Luoshui Ferry from Rate Water to 100 m downstream from Rate Water Bicun Dam In addition,except for the heavy metal Cd and Cr,which exceed the individual points,the content of other heavy metals did not exceed the most stringent agricultural soil pollution risk screening value of the Soil Environmental Quality Standards for Agricultural Land Soil Pollution Risk Control Standard(GB15618-2018).According to the qualitative analysis results of the sediment and the basic situation of the river,combined with the type of sediment,pollution degree and environmental characteristics of the area,the idea of remediation of heavy metal pollution in the area was pointed out,and technical options and feasible remediation plans were provided.