干旱区生态环境知识资源中心(Arid): Rainwater harvesting techniques as an adaptation strategy for flood mitigation

Arid

DOI	10.1016/j.jhydrol.2020.124880
	Rainwater harvesting techniques as an adaptation strategy for flood mitigation
	Tamagnone, Paolo; Comino, Elena; Rosso, Maurizio
通讯作者	Tamagnone, P
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	586
英文摘要	The development of adaptation and mitigation strategies to tackle anthropic and climate changes impacts is becoming a priority in drought-prone areas. This study examines the capabilities of indigenous rainwater harvesting techniques (RWHT) to be used as a viable solution for flood mitigation. The study analyses the hydraulic performance of the most used micro-catchment RWHT in sub-Saharan regions, in terms of flow peak reduction (FPR) and volume reduction (VR) at the field and basin scale. Parametrized hyetographs were built to replicate the extreme precipitations that strike Sahelian countries during rainy seasons. 2D hydrodynamic simulations showed that half-moons placed with a staggered configuration (S-HM) have the best performances in reducing runoff. At the field scale, S-HM showed a remarkable FPR of 77% and a VR of 70% in case of extreme rainfall. Instead at the basin scale, in which only 5% of the surface was treated, 13% and 8% respectively for FPR and VR were obtained. In addition, the reduction of the runoff coefficient (R-c) between the different configuration was analyzed. The study critically evaluates hydraulic performances of the different techniques and shows how pitting practices cannot guarantee high performance in case of extreme precipitations. These results will enrich the knowledge of the hydraulic behavior of RWHT; aspect marginally investigated in the scientific literature. Moreover, this study presents the first scientific application of HEC-RAS as a rainfall-runoff model. Despite some limitations, this model has the effective feature of using very high-resolution topography as input for hydraulic simulations. The results presented in this study should encourage stakeholders to upscale the use of RWHT in order to lessen the flood hazard and land degradation that oppresses arid and semi-arid areas.
英文关键词	Rainwater harvesting techniques Extreme rainfall Runoff Hydraulic modelling Flood mitigation Arid and semi-arid climate
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000544258100041
WOS关键词	WATER ; RAINFALL ; RUNOFF ; SAHEL ; SOIL ; MANAGEMENT ; CLIMATE ; SYSTEM ; RIVER ; VARIABILITY
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324873
作者单位	[Tamagnone, Paolo; Comino, Elena; Rosso, Maurizio] Politecn Torino, Dept Environm Land & Infrastruct Engn, Cso Duca Abruzzi 24, I-10129 Turin, Italy
推荐引用方式 GB/T 7714	Tamagnone, Paolo,Comino, Elena,Rosso, Maurizio. Rainwater harvesting techniques as an adaptation strategy for flood mitigation[J],2020,586.
APA	Tamagnone, Paolo,Comino, Elena,&Rosso, Maurizio.(2020).Rainwater harvesting techniques as an adaptation strategy for flood mitigation.JOURNAL OF HYDROLOGY,586.
MLA	Tamagnone, Paolo,et al."Rainwater harvesting techniques as an adaptation strategy for flood mitigation".JOURNAL OF HYDROLOGY 586(2020).