海绵城市建设中的次暴雨总量控制率及调蓄能力评估:以南宁市竹排冲流域为例
收稿日期: 2024-04-16
修回日期: 2024-07-10
网络出版日期: 2024-09-10
基金资助
国家自然科学基金项目(42261017);广西自然科学基金项目(2021GXNSFBA220025)
Sub-rainstorm Total Control Rate and Storage Capacity Assessment in Sponge City Construction: A Case Study of the Zhupaichong Basin in Nanning
Received date: 2024-04-16
Revised date: 2024-07-10
Online published: 2024-09-10
Supported by
the National Natural Science Foundation of China(42261017);Guangxi Natural Science Foundation(2021GXNSFBA220025)
目前次暴雨量的调控指标在内涵界定、时变性、空间异质性及多目标性等诸多方面存在不足,导致了当前海绵设施建设的主观性和事后评价的滞后性,同时也限制了科学有效快速地推进中国系统化全域海绵城市建设。首先以南宁市竹排冲流域为例,针对上述调控指标问题开展多目标情景的现状下垫面次暴雨径流模拟,分析了该区域次暴雨总量控制率及其对应的海绵设施综合调蓄量的空间异质性。结果表明:研究区次暴雨总量控制率均值为0.500(0.25 a)~0.257(100 a),与南宁市海绵城市建设的75%控制率目标相差甚远。要实现该控制率目标,还需要增加的海绵设施综合调蓄量为200(0.25 a)~950 m3/hm2(100 a)(不含外排)和70(0.25 a)~420 m3/hm2(100 a)(含外排)。最后提出了全域海绵城市建设持续推进的定量指导系统框架“次暴雨总量控制率及调蓄量时空信息图谱”,可综合考虑上述次暴雨量调控指标的诸多问题,全过程定量指导各类海绵设施的多阶段设计、建设和运行效果,为科学有效快速地推进中国系统化全域海绵城市建设提供重要支撑。
关键词: 海绵城市; SWMM暴雨径流模拟; 径流系数; 次暴雨总量控制率; 综合调蓄量
刘妙清 , 杨云川 , 闭光琼 , 廖丽萍 , 黎倩云 , 陈佳盛 , 黄雨虹 . 海绵城市建设中的次暴雨总量控制率及调蓄能力评估:以南宁市竹排冲流域为例[J]. 地球科学进展, 2024 , 39(8) : 823 -836 . DOI: 10.11867/j.issn.1001-8166.2024.062
Regulation indicators for sub-rainstorm quantities currently exhibit deficiencies in various aspects, such as connotation definition, temporal variability, spatial heterogeneity, and multi-objectiveness. These shortcomings have led to a subjective and retrospective evaluation delay in the construction of sponge facilities, thereby hindering the scientific, efficient, and rapid advancement of systematic, full-scale sponge city construction in China. Using the Zhupaichong Basin in Nanning City as an example, a sub rainstorm runoff simulation under multi-objective scenarios of the current underlying surface (2020) was conducted to address the aforementioned regulatory indicator issues. The spatial heterogeneity of the sub rainstorm total control rate and the corresponding comprehensive storage capacity of sponge facilities in this area were analyzed. The results indicated that the average sub-rainstorm total control rate in the study area ranges from 0.500 (0.25 years) to 0.257 (100 years), which is significantly below the 75% control rate target set for the construction of sponge cities in Nanning. To achieve this target, additional comprehensive storage capacities of sponge facilities (excluding external discharge) ranging from 200 m3/hm2 (0.25 years) to 950 m3/hm2 (100 years) and (including external discharge) from 70 m3/hm2 (0.25 years) to 420 m3/hm2 (100 years) are required. A quantitative guidance system framework for the continuous promotion of full-scale sponge city construction, termed the “Sub-rainstorm Total Control Rate and Storage Capacity Spatio-temporal Information Map,” was proposed. This framework can comprehensively address the various issues of sub rainstorm quantity regulation indicators and quantitatively guide the multistage design, construction, and operational effectiveness of various sponge facilities, thereby providing crucial support for the scientific, efficient, and rapid advancement of systematic full-scale sponge city construction in China.
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