Soil Erosion Changes in Jiangxi Province from 2001 to 2015 Based on USLE Model
[Objective] To estimate regional soil erosion modulus and the dynamic change accurately for soil and water conservation planning.[Methods] Using USLE (universal soil loss equation) model,the soil erosion modulus in Jiangxi Province in 2001 and 2015 were estimated with remote sensing data,meteorological data and DEM.Then the temporal and spatial changes of soil erosion intensity in Jiangxi Province from 2001 to 2015 were analyzed.[Results] From 2001 to 2015,soil erosion in Jiangxi Province showed a declining tendency.The soil erosion modulus in 2001 was 7 042.4 t/(km2 · a) and the soil erosion modulus in 2015 was 6375.3 t/(km2 · a),decreased by 9.5％.The soil erosion intensity has decreased in most of the cities in Jiangxi Province.The soil modulus decreased significantly in Fuzhou,Yichun,Ganzhou and Pingxiang Cities.But soil erosion modulus increased in a few cities such as Jiujiang,Nanchang and Xinyuin.The transformation matrix of soil erosion intensity indicated that soil erosion intensity remained unchanged in 52.7％ of the total area of Jiangxi Province from 2001 to 2015.About 25.8％ of the total area experienced soil erosion intensity transformation from high level to low level during 2001-2015.[Conclusion] The soil erosion situation in Jiangxi Province has improved in general,but the soil erosion in some cities has expanded further,and the situation of soil and water loss remains serious.
国家科技期刊平台
NSTL
万方数据
