摘要
基于InVEST模型中的生境质量模块,以合肥市1995年、2005年和2018年土地覆被数据为基础,在ArcGIS中进行转移矩阵分析、叠加分析、栅格计算、分区统计等,在InVEST模型中进行生境质量模拟。结果显示:(1)23年间减少的土地覆被类型是耕地和林地,其中耕地减少量较大,共减少806.06km2;林地减少量较少,共减少3.21km2;其他土地覆被类型均有所增加。(2)23年间建设用地增加迅猛,共增加773.66km2,增加量占2018年建设用地总面积的38%,增幅达到61.64%。(3)23年间主要的土地转移是耕地向其他土地覆被类型转化和其他土地覆被类型向建设用地转化,其中耕地向建设用地转化了934.19km2。(4)得益于“退耕还林、还草、还湖、还水”政策的实施,合肥市林地草地面积总量基本保持不变,水域面积持续增加,水域面积增加区域主要分布在各大水库周边以及巢湖周边。(5)23年间合肥市生境质量持续小幅下降,主城区和各县(市)主城区生境质量下降明显。
Based on the habitat quality module in the InVEST model,and based on the land cover data of Hefei in 1995,2005 and 2018,the transfer matrix analysis,overlay analysis,grid calculation,zoning statistics and other anal⁃ysis are carried out in ArcGIS,and the habitat quality simulation is carried out in the InVEST Model.Finally,the fol⁃lowing conclusions are obtained:(1)The types of land cover decreased in 23 years are arable land and forest land,of which arable land decreased by 806.06km2 in total and forest land decreased by 3.21km2 in total,and other types of land cover increased.(2)construction land increased rapidly in 23 years,with a total increase of 773.66km2,account⁃ing for 38%of the total construction land area in 2018,with a growth rate of 61.64%.(3)23 years The main land transfer situation is:arable land to other land cover types and other land cover types to construction land,of which the arable land to construction land has been transformed into 934.19km2.(4)thanks to the implementation of the policy of“returning farmland to forest,grass,lake and water”,the total area of forest land and grassland in Hefei ba⁃sically remains unchanged,the area of water area continues to increase,and the area of water area increases It is mainly distributed around the major reservoirs and Chaohu Lake.(5)during 23 years,the habitat quality of Hefei city continued to decline slightly,and the habitat quality of the main urban areas and counties(cities)of Hefei city declined significantly。
作者
程爱国
程鹏
吴楠
CHENG Aiguo(Qingshan Township Forestry Station,Dongzhi County,Dongzhi 247200,China)
出处
《安徽农学通报》
2020年第18期60-66,共7页
Anhui Agricultural Science Bulletin
基金
2019年“生态保护红线监管”项目对外委托课题(课题4)
安徽省省级环境保护科研项目(2016-11)。
