城市山体公园分级调控策略水文效益研究  

Research on Hydrology Performance of Hydrological Multilevel Control Strategies in Urban Mountain Park

作　　者：侯庆贺 成玉宁[1,2,3,4] 袁旸洋 HOU Qinghe;CHENG Yuning;YUAN Yangyang

机构地区：[1]东南大学建筑学院,南京210096 [2]江苏省城乡与景观数字技术工程中心 [3]东南大学景观规划设计研究所 [4]东南大学建筑学院景观学系,南京210096

出　　处：《中国园林》2022年第9期69-74,共6页Chinese Landscape Architecture

基　　金：国家自然科学基金重点项目(编号51838003);国家重点研发计划课题(编号2019YFD1100405);江苏省研究生科研与实践创新计划项目(编号KYCX20_0144)共同资助。

摘　　要：因地制宜的山体公园水文分级调控能够有效地从源头到末端控制和利用雨水径流。选取南京市官窑山公园为研究对象,通过构建水文分级调控策略(S1~S4)和水文模型,评估了不同重现期场降水和典型年降水情景下的分级调控水文效益。研究发现,场降水情景下,水文性能随着分级调控策略层级的提升而提升,其中分级截流和调蓄策略(S4)的提升最为显著;分级调蓄策略(S3)表现略优于分级截流策略(S2);末端调控策略(S1)表现最差。从分级调控设施对水文性能的影响角度分析,增加分级调蓄容积为最优选择;而在调蓄容积一定的情况下,分级设置截流设施对水文性能的提升(S2-S1)优于分级调蓄设施(S3-S2)。2015—2020年典型年降水情景下的总体表现与场降水情景一致,控制率和控制效益均随着策略层级的增加而提升;但在极端暴雨和连续降水事件频发的年份,控制率和控制效益明显下降。这要求水文效益的评估应综合考虑不同重现期场降水和长周期典型年降水的影响,尤其应关注连续降水事件的影响。基于山体公园4种水文分级调控策略的水文效益评估结果,以期为类似的城市山体海绵公园、山体雨洪调控,以及水景观规划设计与研究提供决策依据和研究思路。Site-appropriate hydrological multilevel control in mountain parks can effectively control and utilize stormwater runoff from the source to the terminal.In this study,Nanjing Guangyao Mountain Park was selected as the research site,and the hydrological performance was evaluated under various return periods of single precipitation and annual precipitation scenarios by developing hydrological multilevel control strategies(S1~S4) and a hydrological model.The results show that the multi-level interception and storage strategy(S4) is proved to be the most beneficial one,followed by the multilevel storage strategy(S2) having slightly higher results than the multilevel interception strategy(S3),while the terminal strategy(S1) showed poor results.In terms of the impact of multilevel facilities,it is optimal to increase multilevel storage volume.For a given storage volume,the enhancement of multilevel interception facility(S2-S1) is better than that of the multilevel storage facility(S3-S2).Under the typical annual precipitation scenario from 2015 to 2020,the overall performance is consistent with the single precipitation scenario,and both the control rate and performance improved with the increased strategy.However,in years with frequent extreme rainstorms and continuous precipitation events,control rates and performance decrease significantly.This requires that the assessment of hydrological performance should not only consider single precipitation scenarios,but also take the variability of precipitation characteristics in different years into account,especially focusing on the assessment of continuous precipitation events.Based on the results of the hydrological performance assessment of four multilevel control strategies for mountain park,it is hoped that these will provide a decision-making basis for urban mountain sponge parks,stormwater and water landscape planning and design.

关 键 词：风景园林 山体公园 水文分级调控 水文效益 

分 类 号：TU986[建筑科学—城市规划与设计]