气候变化领域集成服务门户(CCPortal): The influence of structural factors on stormwater runoff retention of extensive green roofs: new evidence from scale-based models and real experiments

CCPortal

DOI	10.1016/j.jhydrol.2018.11.066
	The influence of structural factors on stormwater runoff retention of extensive green roofs: new evidence from scale-based models and real experiments
	Liu, Wen; Feng, Qi; Chen, Weiping; Wei, Wei; Deo, Ravinesh C.
发表日期	2019
ISSN	0022-1694
EISSN	1879-2707
卷号	569
英文摘要	Green roofs, in contrast to conventional roofs, retain significant stormwater, and are considerably appealing for urban regions to help mitigate flooding events and addressing serious environmental impacts of excessive or uncontrolled runoff. In designing a green roof, a careful selection of substrate material/depths, vegetation or slopes, or its optimal combination, is imperative but this issue remains underexplored by practicing hydrologists. Scale-based models of extensive green roofs were purposely designed and simulated rainfall experiments were conducted to comprehensively quantify runoff retention performance of extensive green roofs, to precisely determine the contribution of structural factors to stormwater retention. The results indicated that green roofs can effectively retain stormwater and delay the start of the runoff. To aver with this finding, influential contribution of four structural factors are ordered as follows: substrate material > substrate depth > slope > vegetation. This finding denotes that substrate material and its depth are major contributors to a green roof's stormwater retention capability. Statistical tests conducted on runoff retention showed the substrate materials and vegetation types had statistically significant effects, no statistically significant difference in runoff retention abilities among the three substrate depth treatments and the slope gradients considered. Given the same conditions, the study ascertains that runoff retention of low intensity events is likely to be relatively higher, while that of the heavy events is lower than its counterparts. The antecedent moisture contents of the substrate have a significant negative influence on the runoff retention and the time to the runoff.
关键词	Green roof Runoff retention Scale model Simulated rainfall Structural factors Substrate
学科领域	Engineering; Geology; Water Resources
语种	英语
WOS研究方向	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112095
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Wen,Feng, Qi,Chen, Weiping,et al. The influence of structural factors on stormwater runoff retention of extensive green roofs: new evidence from scale-based models and real experiments[J]. 中国科学院西北生态环境资源研究院,2019,569.
APA	Liu, Wen,Feng, Qi,Chen, Weiping,Wei, Wei,&Deo, Ravinesh C..(2019).The influence of structural factors on stormwater runoff retention of extensive green roofs: new evidence from scale-based models and real experiments.JOURNAL OF HYDROLOGY,569.
MLA	Liu, Wen,et al."The influence of structural factors on stormwater runoff retention of extensive green roofs: new evidence from scale-based models and real experiments".JOURNAL OF HYDROLOGY 569(2019).