Assessment of Soil Erosion and Mitigation Strategies in Nghe An Province, Vietnam under Tropical Monsoon Conditions

This study on soil erosion in Thanh Chuong, Nghe An Province (Vietnam) utilized GIS, remote sensing, and the RUSLE model to assess and quantify erosion dynamics.It was found that soil erosion is primarily influenced by the intensity and duration of monsoon rainfall, while the erosion resistance of landscapes is determined by factors such as slope, vegetation cover, and precipitation.High erosion rates were observed in areas where land use was mismatched with local agro-climatic conditions, leading to significant soil loss.The agroecological assessment revealed that 18 % of the study area experiences high to very high erosion, with an average annual soil loss of 25 T/ha.Erosion data were categorized based on three agricultural systems: tea and citrus cultivation along contour lines, annual crops on sloping lands, and perennial crops such as acacia and cassava.Using remote sensing and GIS, erosion was classified into five levels, ranging from very low to very high, while LS-Factor assessments from Landsat 8 images were divided into eight classes.To combat erosion, the study proposes several mitigation measures, including evaluating vegetation cover for anti-erosion efficiency, constructing trenches and embankments, creating terraced slopes, and optimizing agricultural and forestry practices through the SALT models for heavily eroded lands.