基于NPP指标法的贵阳市水土保持功能重要性评价  

Evaluation of the importance of soil and water conservation function of Guiyang City based on NPP index method

作　　者：胡先培 杨云 郭程程 HU Xianpei;YANG Yun;GUO Chengcheng(Land and Mineral Resources Reserve Center,Xifeng Natural Resources Bureau,Guiyang 551100,China)

机构地区：[1]息烽县自然资源局土地矿产资源储备中心,贵州贵阳551100

出　　处：《贵州科学》2024年第5期51-55,共5页Guizhou Science

摘　　要：目的:对贵阳市水土保持功能进行重要性评价,为水土保持功能的区划和治理措施提供重要参考价值。方法:根据其自然环境及社会经济实际情况,选取多年植被净初级生产力(NPP)平均值、地形坡度、土地的土壤可蚀性因子3项因子,基于NPP指标法进行综合评价。结果:贵阳市水土保持功能重要性程度以一般重要、重要等级为主,分别占全市总面积的64.5%和32.43%;其下辖各行政区域也以一般重要、重要等级为主;极其重要等级分布区域面积及占比极小,呈现小区域集中分布,主要分布在贵阳市城市集中建成区及贵阳面积较大的湖泊所在区域。结论:评价结果揭示了贵阳市水土保持功能重要性等级及其空间分布特征,同时也分析出下辖各行政区域在水土保持功能重要性等级分布差异较明显的特征,各地区可根据差异性提供不同的水土保持策略。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 natural 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 extremely 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.

关 键 词：水土保持 植被净初级生产力 喀斯特 土壤类型 

分 类 号：X825[环境科学与工程—环境工程] Q146[生物学—生态学]