Research On Monitoring Of Soil And Water Conservation Based On GIS Technology

Using GIS technology as the main technical means,this study used remote sensing images,daily rainfall data,soil data,digital elevation model(DEM)data,and soil and water conservation program data of production and construction projects in Fuxin region(excluding Zhangwu County and Xinqiu District)from 2000 to 2019.Meteorological data,terrain data within the study area,the vegetation coverage data,land use data such as data analysis,by comparing the figure of fuxin region perturbation spots on remote sensing image and the area of responsibility scope for the prevention and control of soil and water conservation scheme of both,analyze project compliance,and test area production and construction project of soil and water conservation,To complete remote sensing monitoring tasks for production and construction projects in the research area.The main conclusions of the study are as follows:The distribution of rainfall erosivity factor R showed a state of high in the southeast and low in the northwest.The high values in 2000,2005,2010,2015 and 2019 distributed evenly in the southeast of Fuxin region.During 2000-2019,the rainfall erosivity factor in Fuxin region showed an irregular interannual variation trend,and the rainfall erosivity factor was greatly affected by precipitation.This indicates that the annual precipitation in Fuxin area fluctuates obviously due to the influence of human activities.DEM values of elevation factor in Fuxin area are distributed between-163～824m.Slope factor is divided into plain,micro slope,gentle slope,slope,steep slope,steep slope and vertical wall according to different grades.Slope factor is divided into shady slope,semishady slope,sunny slope and semi-sunny slope.The weights of the three terrain factors were calculated according to the entropy method.The distribution of FVC C in each year was higher in the southeast and lower in the northwest,indicating that FVC in Fuxin was higher in the southeast than in the northwest,and the annual mean value showed a trend of first increasing and then decreasing,from 73%in 2000 to 77% in 2005 and then to 73% in 2019.It shows that the vegetation coverage increased first and then decreased in Fuxin mine in the past 20 years,which had an impact on the soil and water loss in this area.The factor P of water conservation measures showed a decreasing trend in cultivated land,woodland and grassland,while the water system,unused land and building land showed an increasing trend in these 20 years.It shows that the vegetation in Fuxin area is obviously damaged by human activities,causing the inducement of soil and water loss.The purpose of this study to make full use of the advantage of GIS in water and soil conservation monitoring,the paper summarizes the basic theory of science of soil and water conservation monitoring for provide theoretical and technical support,the monitoring data are important to the national soil and water conservation database data sources,to grasp the dynamic change of soil and water loss across the country also has the very vital significance.There are 43 figures,9 tables and 54 references in this paper.