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如何优化城市住区绿地布局形态管理场地雨洪? ——基于重庆某住区的模拟实证研究
王 茜1, 颜文涛2, 冯都喜1
1.重庆大学建筑城规学院,硕士研究生;2.( 通讯作者):同济大学建筑与城市规划学 院,高密度人居环境生态与节能教育部重点 实验室,教授,yanwt@tongji.edu.cn
摘要:
国内外学者针对雨水管理目标下的 城市住区场地设计展开了较多研究,但对住 区绿地系统的形态特征和径流控制的定量关 系还缺乏相关探讨。研究对住区绿地形态特 征与径流水系特征进行归纳分类,然后选择 Uwater Drainage作为场地场次降雨径流的 模拟软件,基于重庆某住区设计方案展开降 雨径流的实证模拟研究。研究了住区建筑布 局与绿地形态对降雨径流的影响特征,探索 了整合雨水管理功能的住区绿地系统复合结 构。通过将雨水管理目标融入住区规划设计 阶段,有利于住区更加有效地实现雨水管理 目标。
关键词:  城市住区  绿地形态  功能参数  雨洪管理
DOI:10.13791/j.cnki.hsfwest.20190105
分类号:
基金项目:国家自然科学基金面上项目资助(51278504); 国家自然科学基金面上项目资助(51678087); 中央高校基本科研业务费专项资金资助 (22120180267)
How to Optimize Green Space Layout in Urban Residential Areas for Stormwater Management?—Empirical Evidence from Chongqing
WANG Xi,YAN Wentao,FENG Duxi
Abstract:
MMany researches have been done on the design of urban settlements under the target of stormwater management. However, the quantitative relationship between the morphological characteristics of green space and the runoff control objectives is still not discussed in depth. Firstly, it classifies the green space morphological characteristics and runoff water system characteristics in settlements. Then it employs Uwater Drainage software to simulate the rainfall runoff status of the site based on the design of a residential area in Chongqing. It illustrates the influence of residential building layout and green space morphology on rainfall runoff, and explores the composite structure of residential green space system integrating rainwater management functions. It is conducive to the transformation from the traditional residential planning method to the multi-parameter design method, and achieves the goal of improving the comprehensive benefi ts of the residential green space system. Through simulation experiments, it can be seen that in the form of green space in residential areas, other morphological indicators are kept unchanged, and the larger the green space is, the higher the storage rate of rainwater is, and the stronger the regulation of rainwater runoff is. The morphological characteristicsof green space have different effecton runoff control. According to amount change of rainfall runoff, the influence of morphological characteristics on runoff control is judged. From being strong to weak, green land scale > green space uniformity > green space dispersion > green space shapes index. Complex morphological indices have less effect on rainfall runoff at residential scales. About the residential building layout mode, different settlement patterns are the same for the control of the runoff in the two scenarios of general rainfall and heavy rain. From being strong to weak, the original site > low-level scatter > high-level scatter >group type>multi-level determinant>high-rise peripheral settlement shapes index. Site development will lead to a certain advance in the arrival time of the runoff peak. It can be seen from the simulation results that the peak arrival time of the same settlement mode is closer in the normal rainfall and heavy rain scenarios.The peak arrival time of different runoff patterns is different, from being early to late, the elevation periphery = elevation scatter = group = multi-level determinant
Key words:  Urban Residential Areas  Green Space Layout  Functional Parameters  Stormwater Management