Evaluation of the importance of soil and water conservation function of Guiyang City based on NPP index method
In this study we evaluated the importance of soil and water conservation function of Guiyang City,so as to provide reference for the zoning and control measures of soil and water conservation functions.Based on the natu-ral environment and socio-economic situation of Guiyang,the average annual net primary productivity(NPP)of vegetation,the terrain slope,and the soil erodibility of the land were selected for comprehensive evaluation by the NPP index method.The importance level of soil and water conservation function of Guiyang City is mainly at general importance and importance level,accounting for 64.5%and 32.43%of the total area of the city,respectively.The administrative regions are also at general importance and importance level.The area and proportion of areas at ex-tremely important level are extremely small,showing a concentrated distribution in small areas,mainly in the urban built-up areas of Guiyang City and the areas where the larger lakes are located.The evaluation results reveal the importance level and spatial distribution characteristics of soil and water conservation function of Guiyang City,as well as the significant differences in the distribution of soil and water conservation function importance levels among the administrative regions.Each region can provide different soil and water conservation strategies based on the differences.
soil and water conservationnet primary productivity of vegetationkarstsoil type
NETL
NSTL
万方数据
