雨洪韧性视角下的广州琶洲岛绿色基础设施格局优化研究

Spatial Pattern Optimization of Green Infrastructure in Pazhou Island in Guangzhou from the Perspective of Flood Resilience

岛屿依托优越亲水环境成为最具潜力的城市区域之一,同时也面临严峻雨洪威胁,韧性规划势在必行。绿色基础设施(GI)可为城市提供水量调节服务,其性能因格局而异。以广州琶洲岛为研究对象,利用GIS空间分析技术,总结岛屿雨洪脆弱性特征——系统孤立性、空间分异性和土地矛盾性,提出GI格局优化的"规模-布局-结构-类型"全过程规划路径,通过确定GI的实施规模潜力、优先布局地段、网络结构形态和功能类型定位,得出可实施性、优先评估、分层系统、平灾两用的优化策略。

Relying on the superior hydrophilic environment,the island has become one of the most potential urban areas,and it is facing severe stormwater threat at the same time.Therefore,it is imperative to implement resilient planning.Green infrastructure(GI)can provide stormwater management services for cities,and its performance is related to its spatial pattern.Taking Pazhou Island in Guangzhou as the research object and using GIS spatial analysis technology,this paper summarizes the flood vulnerability characteristics of the island,including system isolation,spatial differentiation and land contradiction.Then it proposes the whole process planning path of“scale-layout-structure-type”for GI pattern optimization,and finally puts forward four optimization strategies,including implementation,priority assessment,hierarchical system and multi-functional scenarios,by determining the scale potential of GI,locating the priority layout of GI,networking the system of GI and positioning the type of GI.