Spatial Analysis of Soil Erosion Risk in Hainan Island by Applying RUSLE Model and Multi-Source Data
In order to comprehensively assess the soil erosion risk of Hainan Island,remote sensing and GIS technologies were used to integrate multi-source heterogeneous spatial datasets,combined with the RUSLE model to evaluate its soil erosion intensity level and loss characteristics.The results show that the soil erosion modulus of Hainan Island is 3.16t/hm2·a,the whole is of slight grade,and the total soil erosion amount reaches 4.66×106t/a;the area occupied by each risk grade is in the following order:Mild(91.47%)>Moderate(6.06%)>Vigorous(1.52%)>Intense(0.72%)>Very intense(0.23%),and accordingly,the percentage of loss generated is in the order of Vigorous(2.08%)<Very Intense(4.54%)<Intense(5.53%)<Moderate(12.60%)<Mild(75.24%).The soil erosion risk on Hainan Island is distributed in a fragmented manner,and the high erosion modulus is mainly distributed in the hilly and mountainous areas in the 25～60km zone around the island.
multi-source data informationRUSLE modelsoil erosionHainan Island
NETL
NSTL
万方数据
维普
