摘要
在全球气候变化与高强度城市化交织的背景下,城市洪涝安全已成为制约超大城市可持续发展的关键瓶颈。立足于广州市将洪涝安全评估纳入法定规划管理体系的政策背景,以广州南站核心区北区为例,系统探讨在控制性详细规划阶段科学集成洪涝安全评估的技术路径与实施机制。研究综合运用Infoworks ICM水文水动力模型与GIS空间分析技术,对100 a一遇降雨情景下内涝风险进行精细化识别,评估片区洪涝风险等级,并结合广州市相关政策要求,构建出“两图一表”为核心载体的成果输出体系。结果表明:研究区域洪涝安全等级为低风险,内涝防治标准达到100 a一遇,区域年径流总量控制率不低于68.6%,关键设施规模得以明确并纳入控规指标。基于本次研究,形成了评估成果向排涝设施、地块指标、调蓄空间等规划要素的转化与传导机制,为推动洪涝风险防控从末端被动治理向源头主动调控的转变提供了可复制、可推广的技术范例。
Against the backdrop of global climate change and high-intensity urbanization,the urban flood safety has become a critical bottleneck restricting the sustainable development of megacities.Based on the policy context of integrating flood safety assessment into the statutory planning management system in Guangzhou,taking the north area in the core zone of South Guangzhou Railway Station as an example,the technical path and implementation mechanism of scientifically integrating flood safety assessment in the control detailed planning stage are systematically discussed.By comprehensively applying the Infoworks ICM hydro-hydrodynamic model and GIS spatial analysis technology,a refined identification of the risk of urban flooding under the scenario of a once-in-a-century rainfall is conducted and the flooding risk level of the area is assessed.Combined with the relative policy requirements of Guangzhou,a result output system with"two diagrams and one table"as the core carriers has been constructed.The results indicate that the flood safety level in the study area is classified as low risk.The urban waterlogging prevention standard reaches a once-in-acentury level.The regional annual total runoff control rate is not less than 68.6%.And the scale of key facilities has been clearly defined and incorporated into regulatory planning indicators.Based on this research,a mechanism for the transformation and transmission of assessment results to planning elements such as flood drainage facilities,plot indicators,and storage and regulation spaces has been formed,providing a replicable and scalable technical model for promoting the shift of flood risk prevention and control from passive governance at the end to active regulation at the source.
作者
马成锦
余梓伟
王诗婧
楼宇轩
温茶眉
MA Chengjin;YU Ziwei;WANG Shijing;LOU Yuxuan;WEN Chamei(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China;Panyu District Branch of Guangzhou Municipal Bureau of Planning and Natural Resources,Guangzhou 511450,China)
出处
《城市道桥与防洪》
2025年第12期156-161,171,共7页
Urban Roads Bridges & Flood Control
