The Study On The Influence Between Land Remediation Measures And Soil Erosion In Tang County

The land remediation work in China has achieved great benefits since its inception in the late 1990s.However,in the process of land rectification,the large-scale development of the project has changed the natural ecological conditions in the region,and it is more likely to cause soil erosion in mountainous regions where the ecological environment is fragile.Starting from the reality of land remediation project,through relevant theoretical basis and technical support,the soil erosion situation in the Tang County's Land Improvement Project area in the Taihang Mountain area was evaluated,and the impact on soil erosion during the implementation of the land remediation project in the area was analyzed.In order to provide the theoretical basis for future soil erosion control works in the same type of regional land improvement projects.This paper establishes a soil erosion evaluation index system based on soil erosion related theories.The revised universaliooil loss equation(RUSLE)method is used to calculate the amount of soil erosion in Tang County's land consolidation project area in2013 and 2017,based on systematic theory and theoretical basis of landscape ecology.The analysis of land remediation projects and soil erosion effects in the study area led to the following conclusions:(1)Field survey of Tang County land remediation project area and division of project types and measures according to specific implementation conditions.After field investigations,the selected 9 project areas were divided into the following 4 types of projects:soil improvement project,slope-to-slope Engineering,irrigation and drainage engineering and road engineering;among which soil improvement projects include soil thickening and surface soil improvement projects and engineering measures are custom soil,deep-soil soil,and deep-turning soils.The slope-changed-terrain works include terraced field engineering and footpath field engineering.The measures of terraces mainly include horizontal terraced terraces,isolation sloping terrace and slope type terraces.The measures of footpath includes stone ridges,ridges,and biology ridges.Irrigation and drainage engineering include irrigation and drainage engineering.Irrigation engineering measures include diversion,well irrigation,and impoundment projects.Drainage engineering measures include self-draining of concrete trenches,self-draining of trenches and self-draining of stone;road engineering are divided into field road projects and production road projects.(2)The soil erosion in the project area of Tangxian land remediation project during2013-2017 has aggravating trend.The changes in soil erosion were mainly reflected in the decrease in slightly eroded area and the increase in areas of mild,moderate,and intense erosion.Among them,the area of slightly eroded intensity decreased by 22.96%(857.87hm~2),and the areas of mild and moderate erosion were respectively It increased by15.19%(567.50 hm~2)and 7.33%(273.81 hm~2),and the intensity(16.56 hm~2)showed little change in the erosion area,and there was no change in the erosion intensity of extreme strength and intensity.(3)The choice of engineering measures in the land remediation process has a great influence on soil erosion.The types of land remediation projects for soil erosion prevention and control effects from the largest to the smallest in order are solid slope engineering>drainage engineering>soil thickening.In the soil thickening project,the soil and soil deepening engineering measures are adopted the soil erosion prevention and control effect is better than the deep-soil engineering measures;in the slope-slope engineering projects,the engineering measures of the soil-bunker plus biological canal are adopted the soil erosion control effect is better than the stone relief engineering measures.In the drainage engineering,the superiority and inferiority of the control effect on soil erosion are:self-discharging of concrete>self-discharging of soil ditch>non-drainage engineering measures.In summary,calculate the amount of soil erosion in Tang County in 2013 and 2017,and combine the type of land consolidation project type system to analyze the impact of land remediation on soil erosion,and assess the current deficiencies in soil erosion in the land remediation project,which is the land remediation project.The selection of measures and the design of the plan provide targets for the prevention and control of soil erosion.