摘要
成都四环内现存的大量棕地,对成都市大力发展公园城市有极大的阻碍作用,不仅破环城市的形象,也对整个成都市的水资源形成了巨大的潜在威胁。以成都四环内主要水域100 m缓冲区范围内现存棕地为研究对象,利用“源-汇”理论研究了棕地形成的面源污染风险及划分污染风险等级。通过GIS、ENVI等技术手段,将棕地作为污染源,对其所在空间位置的各种人为因素与自然因素的差异性,将各指标因子进行叠加分析。得到成都市四环内棕地污染向环境中扩散的最小累计阻力值,并根据阻力值划分出了污染风险等级。结果表明:成都市主要极高风险区主要集中在金牛区、成华区、青羊区,主要的水系中的府河、清水河、摸底河都从极高风险去中穿过。对于城市主要集中治理棕地以及城市水资源保护有一定的指导意义。
The existing large number of brownfields in the Fourth Ring Road of Chengdu have a great impediment to the vigorous development of a park city in Chengdu,which not only destroys the image of the city,but also poses a huge potential threat to the water resources of the entire Chengdu.Taking the existing brownfields within the 100m buffer zone of the main waters in the Fourth Ring Road of Chengdu as the research object,the"source-sink"theory is used to study the non-point source pollution risks formed by brownfields and to classify the pollution risk levels.Through GIS,ENVI and other technical means,the brownfield is taken as a pollution source to analyze the differences between various human factors and natural factors in its spatial location.Superposition analysis of each index factor is performed to obtain the minimum cumulative resistance value of pollution source diffusion in the environment.The pollution risk level is divided according to the resistance value.The main high-risk areas in Chengdu are mainly concentrated in Jinniu District,Chenghua District and Qingyang District.The main water systems,the Fu River,Qingshui River,Modi River,and Modi River,all pass through extremely high risks and have extremely high risks of being polluted,which has certain guiding significance for the main centralized governance of brownfields and the protection of urban water resources.The brownfields located in the extremely high-risk areas distributed in the main urban areas and the main water areas are the key areas that need to be paid attention to in the study of brownfield pollution,and are also the areas that relevant departments focus on preventing and controlling water pollution.
作者
陈琪
黄瑞
李金芮
刘百川
Chen Qi;Huang Rui;Li Jinrui;Liu Baichuan(School of Architecture,Southwest Jiaotong University,Chengdu,Sichuan 611756,China)
出处
《绿色科技》
2022年第22期145-149,共5页
Journal of Green Science and Technology
关键词
棕地
“源-汇”理论
面源污染
最小累计阻力模型
brownfields
"Source-Sink"theory
non-point source pollution
minimum cumulative resistance model
