本文以广西北部湾城市群为例,运用InVEST模型评估法、造林绿化空间适宜性评估法、ArcGIS叠加分析法,定量分析研究区国土空间用地类型状况、生境质量水平和生境退化程度以及规划适宜造林绿化用地规模,并按生境质量等级分类精准识别国土绿化空间优先区域与一般区域.结果表明,研究区全域用地类型主要为林地与耕地,占总面积87.56%.2020年研究区生境质量指数平均值为0.3930;生境质量为中等、良好、优秀3个等级面积占44.34%,生境质量为差和较差2个等级面积占55.66%;生境退化度指数平均值为0.3199,生境退化属较严重等级状况;研究区生境质量总体现状属于中等偏差等级.适宜作为造林绿化空间用途管控的规划图斑个数为48967个、规划面积为30091hm2.研究区生态建设和国土绿化优先区域面积为24276hm2、一般区域面积为5815hm2.造林绿化适宜空间评估划定涉及政策法规、生态需求、科技支撑、经济社会、国际责任及公众参与等多维度驱动力,综合驱动作用显著．通过评估划定城市群适宜造林绿化用地空间并纳入国土空间规划“一张图”进行精细化用途管控,实施城乡绿化空间“天空地”一体化综合监测,有助于解决我国城市群生态建设项目用地难和“造林绿化落地上图”信息化管理短板问题,为城市群生态建设实现“合法合规、施策精准、智慧管理”提供支撑.
Abstract
Taking the Beibu gulf urban agglomeration in Guangxi as an example, this paper uses InVEST model evaluation method, afforestation space suitability evaluation method and ArcGIS overlay analysis method to quantitatively analyze the land use type status, habitat quality level and habitat degradation degree of the study area, as well as the scale of suitable afforestation land for planning, and accurately identify the priority area and general area of land greening space according to the classification of habitat quality. The results show that: The main land use types in the study area are forest land and cultivated land, accounting for 87.56% of the total area. In 2020, the average habitat quality index in the study area was 0.3930. The area of medium, good and excellent habitat quality accounted for 44.34%, and the area of poor and poor habitat quality accounted for 55.66%. The average value of habitat degradation index was 0.3199, and the habitat degradation was a more serious grade. The overall status of habitat quality in the study area belongs to the medium deviation level. The number of planning patches suitable for afforestation and greening space use control is 48967, and the planning area is 30091hm2. The priority area of ecological construction and land greening in the study area is 24276hm2, and the general area is 5815hm2. The evaluation and delineation of suitable space for afforestation and greening involves multi-dimensional driving forces such as policies and regulations, ecological needs, scientific and technological support, economic society, international responsibility and public participation, and the comprehensive driving effect is significant. By evaluating and delimiting the space suitable for afforestation and greening land in urban agglomerations and incorporating it into the 'one map' of land and space planning for refined use control, and implementing the integrated comprehensive monitoring of urban and rural greening space ' sky and land ', it is helpful to solve the problem of land use for ecological construction projects in urban agglomerations in China and the short board of information management of ' afforestation and greening landing map', so as to provide support for the ecological construction of urban agglomerations to achieve' legal compliance, precise implementation and intelligent management'.
关键词
造林绿化空间适宜性评估 /
国土绿化空间分类分区 /
驱动力 /
InVEST模型评估 /
广西北部湾城市群
Key words
suitability evaluation of afforestation space /
land greening space classification partition /
driving force /
inVEST model evaluation /
Guangxi Beibu gulf urban agglomeration
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基金
国家重点研发计划项目(2023YFD2201705-7);广西林业设计院自筹经费科技项目(林勘科研[2023]-03)
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