Study On The Relationship Among Dump Slope Aspect And The Vegetation Coverage Of Large Opencast Coal Mine In Loess Plateau

The Loess Plateau is a serious soil erosion areas of China, and the coal miningexacerbated this phenomenon, resulting in a large number of land resources damage.Land Reclamation which is a technical means to repair the damaged land productionfunction and ecological function has been paid more and more attentions. How toknow whether the results of land reclamation reclamation work achieving "LandReclamation Quality Standards" requirements, and as a guidance for the future workof land reclamation for evaluation of reclamation work is good or bad is crucial.By means of field survey, simulation analysis, map overlay, comparative researchmethods, we get the study area slope and aspect data, vegetation coverage, vegetationconfiguration data, to analysis the vegetation coverage level in study area after20years of land reclamation, to provides supervision whether these area meets thereclamation technical standards; to get high or low vegetation coverage in differentslope and aspect,and the influence of these different factors on the vegetationcoverage, and give reference for the landform remolding in future with the same typeof mine reclamation area.In this paper, the main results are as follows:(1) The study area of artificialdump debris were not in law, but as the background is roughly the same in soil, thebackground soil were with little difference, the vegetation coverage of inversion ofvegetation coverage is more than40%, achieved the Reclamation QualityStandards.(2) The results showed that the slop influence in the vegetation coverage isthat, with the increase of slope, vegetation coverage generally decreased firstly andthen increased and then decreased again, the vegetation coverage on gentle slope>micro slope>little steep slope>steep slope>very steep slope. The slope has a stronginfluence on the vegetation coverage, but did not reach significant level.(3)Influenceof slope direction on vegetation coverage results show that the study area ofvegetation coverage, shady aspect> half shady aspect>half sunny slope>sunny slope,slope aspect affected the solar radiation to influent the surface evaporation, and theinfluences of vegetation coverage, results show that in the study area, a small amount of evaporation of slope vegetation coverage is higher than the evaporation of the slope,the slope the influence on vegetation coverage than the gradient effect on vegetationcoverage is more intense, reached a significant level.(4) the slope vegetationconfiguration mode effects on vegetation coverage reflected that in the study areaslope vegetation coverage. Seabuckthorn×Robinia pseudoacacia forest>mixed forestof Hippophae rhamnoides pure forest> other> Caragana×Simon Poplar mixedforest> black locust plantations, it Indicates that the better configuration modeselection of vegetation distribution patterns arbor shrub than the selection of singleplant in pure stands of vegetation reconstruction.