水利水电技术2017，Vol.48Issue(6)：7-12,6.DOI:10.13928/j.cnki.wrahe.2017.06.002
海绵小区削峰减洪效率对降雨特征的响应
Effectiveness of systematically-installed sponge facilities under different rain patterns
摘要
Abstract
The sponge city construction increases the types of the urban underlying surface to a certain scale and makes the urban non-linear rainfall-runoff relationship more complicated.The study on how the runoff control capacity of the sponge district is impacted by the rainfall characteristics is helpful for understanding and predicting the effects from the urban sponge bodies in different rainfall events,thus can provide references for planning and construction of sponge city.By taking a typical sponge district in Xiamen as the study case,the impacts from rainfall returning period,rainfall duration and rainfallpeak coefficient on the peakclipping and flood reducing capacity of the sponge district are analyzed herein through the simulative calculation made by SWMM model;from which both the flood volume reducing rate and the flood peak clipping rate of the sponge district under different design rainfalls are calculated in comparison with the conventional district.The result shows that along with the increase of the rainfall returning period from 2 years to 100 years,the total flood volume reducing rate is decreased from 63.84％ to 50.88％ and the flood peak clipping rate is decreased from 65.98％ to 37.42％;along with the increase of rainfall duration from 1 h to 6 h,the total flood volume reducing rate is increased from 58.34％ to 61.82％ and the flood peak clipping rate is decreased from 63.73％ to 56.26％;along with the increase of the flood peak coefficient from 0.1 to 0.9,the total flood volume reducing rate is increased from 58.34％ to 61.82％ and the flood peak clipping rate is decreased from 63.73％ to 56.26％.The flood peak clipping capacity is more sensitive to the rainfall process,i.e.the larger the rainfall volume is,the more lagged the peak value is to be and the more unfavorable is to be for the reduction of the flood peak flow rate;while the larger the rainfall volume is,the shorter the duration is to be and the more unfavorable is to be for the reduction of the total runoff.Under different rainfall intensities,the effect from the integration of the sponge district is more stable than that from a single low-impact development measure.It is demonstrated that during sponge city construction,the method of considering the combination among several types of works and paying attention to vertical design is more effective than the measure to build only one type of facility in a large amount.关键词
海绵小区/SWMM/削峰减洪/低影响开发措施/降雨特征Key words
sponge district/SWMM/runoff reduction/LID measure/rainfall characteristics分类
建筑与水利引用本文复制引用
向晨瑶,刘家宏,邵薇薇,梅超,夏霖,王浩..海绵小区削峰减洪效率对降雨特征的响应[J].水利水电技术,2017,48(6):7-12,6.基金项目
国家自然科学基金项目(51522907) （51522907）
国家重点研发计划课题(2016YFC0401401) （2016YFC0401401）
流域水循环模拟与调控国家重点实验室团队重点课题(2016ZY02) （2016ZY02）
