Spatial-temporal variations of soil erosion intensity and landscape pattern analysis in Erhai Lake basin
The spatial-temporal variations of soil erosion tensity in Erhai Lake basin were studied by using RUSLE and hotspot analysis,the Fragstats software was used to analyze the change trend of landscape pattern influenced by soil erosion from type and landscape levels.Results showed that:(1)during the 20 years,annual average soil erosion modulus decreased consisitently.The area of micro-erosion intensity increased,but that of the other stronger intensities decreased.In conclusion,the status of soil erosion in Erhai Lake basin improved.(2)With the increase of the slope,annual average soil erosion modulus firstly increased and then decreased,reaching the peak when the slope was 15°-25°.(3)The landscape pattern was also optimized in Erhai Lake basin from 2000 to 2020.
soil erosionlandscape patternErhai Lake basinhotspot analysis
万方数据
维普
