Monitoring Of Vegetation And Soil Erosion In Dump Slope Based On UAV Remote Sensing Technology

As a typical disturbed patch in the mining area,the dump field is subjected to wind,under the action of hydraulic power,soil erosion and even landslide can occur.The soil erosion degree under different vegetation cover conditions will be different,and the influence of reclaimed vegetation on soil erosion can indicate the ecological restoration of dump soil.In this paper,3 representative research areas are selected in the South Dump soil field of Shengli mining area,the DSM and Dom of the research area were obtained by UAV remote sensing technology.The vegetation and soil erosion in the research area were extracted.The patch division of the slope of the dump site was carried out according to the vegetation allocation.The relationship between vegetation and soil erosion was studied,and finally obtains the following main results and conclusions:(1)The UAV remote sensing technology was successfully applied to the extraction of fine vegetation in dump.The parameters of leaf area index,chlorophyll content,and vegetation coverage and height were extracted by UAV multispectral remote sensing data.The vegetation parameters obtained above were combined with multispectral images,and the object-oriented Multiscale segmentation method was used to classify,and the precision of the classification result was 88.71%.(2)The UAV Remote sensing technology was successfully applied to the quantitative extraction of rill erosion.By analyzing the curvature of the ground and defining the threshold value to determine the range of erosion ditch.According to the distance from the edge of the channel and the depth of the ditch,the points in the gully are classified.Through the focus statistic analysis,the erosion depth of each threshold is counted,and then the high precision quantitative extraction of erosion ditch is realized.(3)By dividing plaque in three research areas,13 regions were divided,the quantitative relationship between soil erosion and vegetation allocation,vegetation coverage and vegetation location were studied.The results of the study show that the higher the vegetation coverage and the smaller the erosion modulus.The 25% coverage can be defined as a lower limit of vegetation coverage,below this value,regardless of the configuration,soil erosion is serious.The 45% coverage can be defined as the upper limit of vegetation coverage,and then increase vegetation coverage for the erosion although the effect is relatively small.In addition,the higher the proportion of perennial herbs and shrubs,the stronger the ability to resist erosion,but there is a limit,in the existing research area 1-4(44%,Caragana 41%,Sha dozen Wang 8%,oil Artemisia 3%,alfalfa 3%)for optimal vegetation allocation.