Summary on the Influence and Treatment of Benggang Erosion on the Quality of Farmland in Proluvial Fan
Benggang is a serious soil erosion landform in the red soil hilly area of southern China.Benggang erosion causes serious harm to the quality of alluvial fan farmland,however,there are currently few literature reports.Benggang erosion produces a large amount of alluvial deposits that wash into farmland,damaging water conservancy facilities,desertifying soil,and deteriorating the eco-logical environment of farmland.This study analyzed the harm of Benggang erosion to farmland in the downstream proluvial fan,sorted out the causes of soil quality deterioration from three perspectives,including soil quality,croped yield and impacted on the surround-ing environment.Corresponding prevention and control measures were proposed:engineering measures to intercept run off and sand,forest and grass measures to build biological protection barriers,agricultural measures to improve soil texture,and enhance soil fertili-ty.Reasonable combination of the above measures can improve the farmland of alluvial fans,reduce the harm of landslide erosion,and increase land productivity.To conduct research on the causes and prevention measures of soil degradation in the collapsed alluvial fan area,and to provide scientific theoretical basis for the comprehensive restoration of farmland quality in the collapsed alluvial fan area.
slope disintegrationproluvial fanrestoration of farmland qualitygovernance measures