Forest and Grassland Resources Research >
Changes of Soil Erosion in the Small Watershed of the Taqing River in Southern Yunnan Province in Recent 20 Years Based on GIS
Received date: 2018-09-25
Revised date: 2018-12-07
Online published: 2020-09-27
Based on the geographic information system technology and the 2001,2007 and 2016 QuickBird image data of the small watershed,the RUSLE model was used to calculate the amount of soil erosion in 2001,2007 and 2016.Analysis was done on soil erosion changes under different land use types.The results show that the soil erosion intensity in the left river basin of the Taqing River is mild and moderate,accounting for 79.44%~80.55% of the total area.The area of tea land continued to increase,which was 137.92,146.46,180.84 hm2 respectively.The forest land accounts for 60.04%~67.17% of the total area.The planting area of tea fields and cultivated land steep slopes has increased year by year and unreasonable reclamation has caused soil erosion in the basin to intensify.The difference in soil erosion between 2001 and 2016 was 44 133.38,46 600.56 and 44 856.95t/a,respectively.The soil erosion comprehensive index changes by about 5%.There is a coupling relationship between land use change and soil erosion.The change of tea land in the study area has little effect on the soil erosion in the basin.It is necessary to strengthen the corresponding soil and water conservation measures for the cultivated land in the basin.
Bude SU , Yangyi ZHAO , Keqin WANG , Xu DUAN , Bin FANG . Changes of Soil Erosion in the Small Watershed of the Taqing River in Southern Yunnan Province in Recent 20 Years Based on GIS[J]. Forest and Grassland Resources Research, 2018 , 0(6) : 90 -98 . DOI: 10.13466/j.cnki.lyzygl.2018.06.015
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