Research Of Water Environment And Pollution Characteristics Of Linhuan Coal-mine Subsided Area In Huaibei

The subsidence water is a special kind of water,which is the derivatives of coal mining.lt is an important part of the surface water resourcs.By the land-wetland-small lakes development,the ssubsidence area has changed the land resource to the water resource.At the same time,its utilization becomes to fishery cultivation and irrigation,instead of planting crops.For a long time,subsidence water was influnced by agricultural non-point,mining area sewage,as a result,it may do harm to ground water and the lands around it.Therefore,it is quite necessary to waters to do the ssubsidence water quality monitoring,and analyzes the changes of water quality indexs,to evaluate the water quality and understand the pollution condition and its eutrophication level,in order to provide technical support for comprehensive administration and water safe and effective use of the ssubsidence water.In this paper,we take the Linhuan coal mine subsidence water as the research object,and collect relevant material and do the pollution sources survey.After the three-season water quality monitoring,the main research contents and conclusions are as follows:(1) Analyzed the water conventional indexs,the heavy metals and the nutrient indexs,the results show that,the effect of Huihe river,coal gangue and fly-ash on many indexes are obvious.As a result,many indexes show difference on both time and space.(2) Analyzed the correlation between every two indexs,the results show that,different correlation exist in physicochemical indexs, nutrients, organic indexs and heavy metals.(3)Take<The surface water environment quality standards>for standards to evaluate the water quality of subsidence water and the rivers around it. The results show that the water quality are Category5of all the waters in the the research object,the main pollutant of the subsidence water is TN,pollutants of other surface waters are S2-,F-,CN-,NH3-N,CODCr-.(4) Evaluate the water quality with Nemerow index method,the results show that6sections has reach the leval of Clean,the section of Coal gangue piles in summer has reaches the leval of Heavy pollution,other sections have reache the leval of Light pollution. (5)Take the organic pollution evaluation with Organic pollution comprehensive evaluation method,the results show that the evaluation results of the six sections are Relatively good during the monitoring period.(6)The eutrophication evaluation results show that the subsidence water reaches to light eutropher in three seasons,TN is the largest contribution to its eutrophic.