基于生态系统服务空间流的洪涝调节 服务需求制图与生态空间优先级识别

中国快速城市化地区面临严重洪涝风险和洪涝调节 服务供需空间的分离。为识别在满足洪涝调节服务需求方面重 要性高的生态空间以纳入保护的优先级，提出了一种在生态空 间中绘制洪涝调节服务需求的新技术：基于生态系统服务空间 流，利用流量、流边界、流方向、分配原则及其修正因子4个 多维指标，表征将服务需求从建设空间向生态空间分配与投射 过程的关键环节。结果显示：面积大、人口密度高的建设空间 存在高需求流量；借助水文空间流，服务需求由建设空间被分 配至同一集水区内具有洪涝调节能力的生态空间中；被投射为 高服务需求的生态空间大多规模较大或紧邻高需求的建成空 间。通过控制流量、扩展流区域、增加流方向和提升生态空间 服务供应能力，能有效调控投射于生态空间内的洪涝调节服务 高需求。

Mapping of Flood Regulation Service Demand and Identifying of Priority Settings of Ecological Spaces in Rapidly Urbanized Area Based on Ecosystem Service Spatial Flow

China''s rapidly urbanized areas face serious flood risks and the separation of supply and demand spaces of the flood regulation service. To identify the priority settings for restoration and protection of ecological spaces with high importance in meeting flood regulation service demand, this paper proposed a novel technique for mapping flood regulation service demand in ecological spaces: based on the ecosystem service spatial flow, the key links of the service demand allocation and protection process from construction spaces to ecological spaces were represented by using for multidimensional indicators: flow quantity, flow boundary, flow direction, and allocation principle and the correction factors. The results showed that the construction spaces with large area and high population density have high demand flow quantity. With the hydrological spatial flow, service demand was allocated from construction spaces to ecological spaces with flood regulation capacity within the same catchment. The ecological spaces projected as high service demand areas were large in scale or close to the construction spaces with high demand. By controlling flow quantity, expanding flow area, increasing flow direction, and improving service supply capacity of ecological spaces, high demand for flood regulation service projected in ecological spaces can be effectively regulated