DOI: 10.3724/SP.J.1249.2021.01001
为研究不同本底特征与城市建设特性下海绵城市建设特点,选择中国深圳市4个典型海绵城市监测评估区:光明区国家海绵城市建设试点区域5#排水分区(旧工业区城市更新型)、15#排水分区(老旧小区与旧工业区综合整治型)、坪山区新和水流域(内陆型)以及盐田区大梅沙片区(临海型),以年径流总量控制率为评价指标,对4个监测评估区的建设的阶段性成果进行总结与对比.分析发现,4个监测评估区的年径流总量控制率均达到上位规划对监测评估区的目标要求,但是,监测评估区不同的城市建设特性、水系调蓄性能等因素与海绵城市建设成效密切相关.提出现阶段海绵城市建设工作严抓项目合规性建设的同时,进一步强化在规划框架下以片区效应平衡统筹为策略.针对片区所面临的城市雨水问题,深度识别片区所拥有的本底资源与高效能海绵承载空间,注重综合统筹,强调系统内部共同分担、资源整合解决实际问题; 突出海绵城市系统化、成片化推动,促进整体达标效能,提高海绵城市连片效应和显示度; 引导海绵城市建设站在片区层面,从系统达标出发,实现连片效应的初步设想和建议.
To study the characteristics of sponge city construction under different background and urban construction characteristics, choosing No.5 drainage area(urban renewal of old industrial districts)and No.15 drainage area(comprehensive improvement of old residential and industrial area)in Guangming District, Xinhe water basin in Pingshan District(inland area), and Dameisha area in Yantian District(coastal area)as typical sponge city monitoring and evaluation areas, we summarize and compare the phase achievements of monitoring and evaluation in four areas based on volume capture ratio of annual rainfall. The volume capture ratios of annual rainfall in the four areas have reached the target set by the upper planning. Moreover, the characteristics of urban construction and the regulation and storage performance of water system are correlated with the construction effect of sponge city in the four areas. We propose that the construction of sponge city should not only strictly focus on compliance construction, but also strengthen the balance and coordination of contiguity effect under the planning framework. Focusing on the urban rainwater issues, we deeply identify background resources and high-efficiency sponge bearing space of the area, pay attention to the comprehensive planning, and emphasize the internal co-ordinationand integration of resources to solve practical problems systematically at district level. We emphasize the systematization and regional effect of sponge city, promote the overall efficiency of reaching the standard, and improve the contiguous effect and display degree of sponge city. We suggest to guide the sponge city construction station to realize the contiguous effect from the perspective of system reaching the standard at the district level.
