| 摘要: |
| 城市绿地水系作为影响城市绿地生态稳定的主要因素，在雨洪管理中承担着重要角色，总结具有普遍指导意义的设计方法可以为海绵城市的理论研究和建设提供参考。以第二届河北省园林博览会（秦皇岛）园区为研究对象，通过分析和解决场地面临的雨水安全问题，提出基于水安全目标的城市绿地水体设计方法：1）确定雨水径流控制目标；2）计算场地内外源径流消减总量并确定水体调蓄容积；3）利用SWMM软件建立动态管理模型，对比分析场地开发前后雨洪调蓄能力；4）结合水体设计的景观化策略，通过水利分析模型（MIKE21）对水景面积进行模拟。结果表明：1）通过合理的水体设计，城市绿地可以有效调蓄场地及周边区域地表径流；2）基于水安全目标的城市绿地水体在设计时需综合考虑现状条件、海绵城市区域建设要求与控制目标，并利用情景模拟的方法结合定量与定性分析，最终确定设计方案。 |
| 关键词: 风景园林 水安全 半湿润地区 城市绿地 雨洪管理 水系设计方法 |
| DOI：10.14085/j.fjyl.2020.11.0064.06 |
| 分类号:TU986 |
| 基金项目:国家自然科学基金（编号 31800606）；2015 北京市共建项目（编号 2015BLUREE01） |
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| Method for Designing Urban Green Space Water System Based on Water Security: A Case Study of 2nd Hebei Garden Expo (Qinhuangdao) Park |
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LU Yiyun, GE Xiaoyu
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Beijing Forestry University
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| Abstract: |
| As the main factor affecting the ecological stability of urban green space, the urban green space water system plays an important role in stormwater management. Summarizing the design methods with universal guiding significance can provide reference for the theoretical research and construction of sponge cities. Taking the 2nd Hebei Garden Expo (Qinhuangdao) Park as the research object, this paper proposes a design method of water system in urban green space based on the water security objectives by analyzing and solving rainwater safety problems of the site. For the site’s water system design based on water security objectives: 1) Determine the objectives of stormwater runoff control; 2) Calculate the total amount of runoff reduction from sources in and out of the site, and propose the volume of water storage; 3) Establish a dynamic management model with SWMM to compare and analyze the stormwater storage capacity before and after the site development; 4) Simultaneously meet the water safety objectives, combining the landscape strategy of water system, through the water conservancy analysis model (MIKE21) to simulate the waterscape effect. The conclusion comes to: 1) Through reasonable water system design, urban green space can effectively regulate and store surface runoff in the site and surrounding areas; 2) In the design of urban green space water system based on water security objectives, the current conditions, sponge city regional construction requirements and control objectives should be taken into comprehensive consideration, and the final design scheme should be determined by combining quantitative and qualitative analysis with the scenario simulation method. |
| Key words: landscape architecture water security semi-humid region urban green space stormwater management method of water system design |
