摘要
综合评价广东省林地生态脆弱性等级,掌握广东省林地生态脆弱性的空间分布特征,可为公益林布局优化和生态修复提供理论支持。以广东省第三次全国国土调查成果、林草湿综合监测成果、生态保护红线成果、石漠化监测成果、DEM数据、气象数据、土壤数据等为基础数据,选取人口密度、单位建设用地、耕地占比、植被覆盖度、石漠化严重地区、年均降水量、植物净初级生产力、生物丰度等17个评价指标,基于3S技术,结合SRP模型,采用层次分析方法构建广东省林地脆弱性评价指标体系。结果表明:广东省林地生态环境脆弱性以微度、轻度、中度脆弱为主,占全省林地总面积的92.02%;从行政区划来看,重度脆弱区和极度脆弱区主要分布在清远市、韶关市、梅州市、河源市、肇庆市、茂名市、揭阳市7个市;从空间布局来看,重度脆弱区和极度脆弱区相对集中分布在石漠化区域、水土流失重点治理区和水土流失重点预防区、珠江三角洲人口密集区以及沿海基干林带和周边岛屿。
The comprehensive evaluation of forest ecological environment vulnerability in Guangdong province and the knowledge of their temporal and spatial distribution characteristics are helpful to provide theoretical sup⁃port for the optimization of commonweal forest layout and ecological restoration.According to the 3S technology,and on the supply of fundamental geographic data of the third national land survey,comprehensive monitoring results for forest,grassland,wetland,ecological conservation redline,and rocky desertification,DEM data,meteorological data,and soil data,we derived 17 assessment indicators such as population density,construc⁃tion land per unit area,proportion of cultivated land,fraction vegetation coverage,area size with severe rocky desertification,annual average precipitation,plant net primary productivity,and biological abundance and so on to construct the evaluation index system for forest ecological vulnerability in Guangdong province by com⁃bined with ecological SRP model and Analytic Hierarchy Process method to evaluate the forest ecological vulner⁃ability of Guangdong province.The results indicate that the ecological environment vulnerability of forest land in Guangdong province is mainly slightly,mildly,and moderately,together accounting for 92.02%of the total forest land area in the province.Divided by administrative division,the severely vulnerable areas and extremely vulnerable areas are mainly distributed in 7 cities,including Qingyuan,Shaoguan,Meizhou,Heyuan,Zhaoqing,Maoming,and Jieyang.Divided by spatial layout,the severely vulnerable areas and extremely vulnerable areas are relatively concentrated in the main rocky desertification areas,key control areas and key prevention areas of water and soil loss,densely populated areas in the Pearl River Delta,coastal trunk forest belts,and surrounding islands.
作者
李佳
彭泰来
刘寅学
张家阳
刘金山
杨传金
LI Jia;PENG Tailai;LIU Yinxue;ZHANG Jiayang;LIU Jinshan;YANG Chuangjin(Central South Academy of Inventory and Planning of NFGA,Changsha 410014,Hunan,China)
出处
《中南林业调查规划》
2024年第1期33-37,共5页
Central South Forest Inventory and Planning
关键词
林地脆弱性评价
SRP模型
层次分析方法
3S技术
广东省
forest ecological vulnerability
SRP model
Analytic Hierarchy Process
3S technology
Guang⁃dong Province
