摘要
在雨涝灾害威胁日益凸显的背景下,基于生态系统水文调节服务供需匹配分析的规划防涝优先干预区识别,为高效降低城市雨涝风险、利用规划措施防涝提供了新的研究思路与科学支撑。运用数据叠置、水文模拟及公式计算法,将城市原生雨涝供给能力与雨涝需求水平统一至同一评估体系中。结合降雨量、下垫面类型,运用径流曲线模型对街区地表径流调节率进行计算,生成供给能力评估结果;以GIS水文模拟结果计算得出的危险性、暴露性和脆弱性指数生成需求水平评估结果。根据石家庄中心四区3a一遇、50a一遇情景供需匹配结果,划定城市街区尺度的规划干预等级,并分类提出相应规划策略。研究结果表明:石家庄市中心四区低供给高需求街区在3a一遇降雨情景下以点状聚集分布;50a一遇降雨情景下,在京广铁路线沿线呈现纵向聚集形态。同时,在两种降雨情景下,规划干预高等级街区均集中出现于桥西区苑东街道、彭后街道、东华街道,长安区长丰街道、建北街道,裕华区裕翔街道、建华南街道。根据规划干预等级、供需相对关系及供需失衡原因,分别提出3a一遇、50a一遇降雨情景下的九类规划干预策略,为城市雨涝灾害的规划应对提供优化思路。
In the context of the increasing threat of waterlogging,based on the existing hydrological regulation service capacity of the ecosystem,the identification of urban waterlogging risks and areas in urgent need of planning and optimization of flood prevention can provide a scientific basis for the efficient reduction of urban waterlogging risk and the use of planning measures to prevent flooding.Data overlay,hydrologic simulation and formula calculation methods were used to unify the urban primary rainfall and flooding supply capacity,as well as rainfall and flooding demand levels into the same assessment system.Combining rainfall and subsurface type,the runoff curve model was used to calculate the neighborhood surface runoff regulation rate to generate the supply capacity assessment results;and the hazard,exposure,and vulnerability indices calculated from GIS hydrologic simulation results were used to generate the demand level assessment results.Based on the results of matching supply and demand for the 1-in-3-year and 1-in-50-year scenarios in four central districts of Shijiazhuang city,the planning intervention level of urban block scale was delineated,and corresponding planning strategies were proposed.The results show that the low supply and high demand blocks in the four municipal districts of Shijiazhuang City are distributed in a point-like aggregation under the scenario of 1-in-3-year period,while under the scenario of 1-in-50-year period,the blocks along the Beijing-Guangzhou Railway line show a longitudinal aggregation pattern.Under both scenarios,the high planning intervention level blocks are concentrated in Yuandong Street,Penghou Street,Donghua Street in Qiaoxi District,Changfeng Street,Jianbei Street in Changan District,Yuxiang Street and Jianhua South Street in Yuhua District.Based on the planning intervention level,relative relationship between supply and demand,and the causes of supply and demand problems,we propose nine types of planning intervention strategies for the 1-in-3-years and 1-in-50-years rain and flood scenarios,which provide optimization directions for cities to cope with waterlogging disasters.
作者
倪丽丽
刘晔
李经纶
李云玉
NI Lili;LIU Ye;LI Jinglun;LI Yunyu(School of Architecture and Art Design,Hebei University of Technology,Tianjin 300132,China;Key Laboratory of Healthy Human Settlements in Hebei Province,Tianjin 300132,China)
出处
《生态学报》
CAS
CSCD
北大核心
2024年第13期5828-5841,共14页
Acta Ecologica Sinica
基金
河北省高等学校人文社会科学研究项目(BJS2022007)。
关键词
生态水文调节服务
雨涝供需匹配
规划干预
石家庄中心四区
eco-hydrological regulation services
matching supply and demand of waterlogging
planning interventions
four municipal districts in the center of Shijiazhuang
作者简介
通讯作者:刘晔,E⁃mail:ly9816@126.com。
