申红彬,徐宗学,张书函,李其军.不同汇流关系LID降雨控制方式分析检验[J].水利学报,2019,50(5):578-588 |
不同汇流关系LID降雨控制方式分析检验 |
Analysis and test on rainfall control modes of LID facilities with different confluence types |
投稿时间:2018-11-19 |
DOI:10.13243/j.cnki.slxb.20181024 |
中文关键词: LID 汇流关系 串联并联 降雨控制方式 监测检验 |
英文关键词: LID confluence relationship series and parallel rainfall control mode monitoring and exami-nation |
基金项目:国家科技重大科技专项(2013ZX07304-001) |
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中文摘要: |
雨水径流总量控制作为城市低影响开发(Low Impact Development,LID)重要目标之一,对降雨选用何种控制模式(方式)是个重要的问题。本文通过理论分析与实际监测检验,对不同汇流关系下LID降雨控制方式的区别进行了分析研究。理论分析结果表明,LID设施与不透水地表之间依汇流方式不同可以分为串联、并联两种关系形式,分别对应不同的降雨控制方式。对于小于设计降雨量的降雨,前者为场次控制,后者为部分控制;对于大于设计降雨量的降雨,两者均为部分控制。从各场次降雨控制总量来看,前者略大于后者;从对地下水涵养、径流水质改善和流量峰值削减角度而言,前者效果要优于后者。因此,对于LID雨水径流控制效果的检验,不能仅限于降雨总量控制率的统计,还需分析判别LID降雨控制的方式,尽量选用串联的汇流形式。以北京未来科技城为例,对其LID雨水径流控制效果与方式进行了分析检验。结果表明,虽然监测期内雨水总量控制率可以达到≥ 85%的目标,但对小于设计降雨量的场次降雨未能实现场次控制,原因在于区内不透水车道与两侧绿化带未按规划实现串联布置,后期有待加以改进。 |
英文摘要: |
The volume of rainfall control is one of the most important objectives of LID (Low Impact Devel-opment). For different confluence relationships, the rainfall control modes are different. Theoretical analysis shows that there are two kinds of confluence relationships between LID facilities and impervious surface:se-ries and parallel. For the individual rainfall events with the value smaller than the designed rainfall, the rainfall control modes are event capture for series system and partial capture for parallel system. The total volume of rainfall captured by series system is slightly bigger than the parallel system. Moreover,the series system is more favorable to water quality improvement and peak flow reduction. Therefore the examination on rainfall control effects includes not only the volume capture ratio of rainfall but also the rainfall control mode. The monitoring and examination steps of rainfall control mode were proposed and the Future Science & Technology Park in Beijing was selected for case study. The examination results showed that the volume capture ratio of rainfall was greater than 85%, but the rainfall control mode for the designed rainfall was partial capture, as the impermeable roads were not connected with the LID facility. In view of the above fact,the suggestions for later improvement were proposed. |
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