气候变化领域集成服务门户(CCPortal): Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems

CCPortal

DOI	10.5194/hess-24-2855-2020
	Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems
	Moreno-De-Las-Heras M.; Merino-Martín L.; Saco P.M.; Espigares T.; Gallart F.; Nicolau J.M.
发表日期	2020
ISSN	1027-5606
起始页码	2855
结束页码	2872
卷号	24 期号:5
英文摘要	Connectivity has emerged as a useful concept for exploring the movement of water and sediments between landscape locations and across spatial scales. In this study, we examine the structural and functional controls of surfacepatch to hillslope runoff and sediment connectivity in three Mediterranean dry reclaimed mining slope systems that have different long-term development levels of vegetation and rill networks. Structural connectivity was assessed using flow path analysis of coupled vegetation distribution and surface topography, providing field indicators of the extent to which surface patches that facilitate runoff and sediment production are physically linked to one another in the studied hillslopes. Functional connectivity was calculated using the ratio of patch-scale to hillslope-scale observations of runoff and sediment yield for 21 monitored hydrologically active rainfall events. The impact of the dynamic interactions between rainfall conditions and structural connectivity on functional connectivity were further analysed using general linear models with a backward model structure selection approach. Functional runoff connectivity during precipitation events was found to be dynamically controlled by antecedent precipitation conditions and rainfall intensity and strongly modulated by the structural connectivity of the slopes. On slopes without rills, both runoff and sediments for all events were largely redistributed within the analysed hillslopes, resulting in low functional connectivity. Sediment connectivity increased with rainfall intensity, particularly in the presence of rill networks where active incision under high-intensity storm conditions led to large non-linear increases in sediment yield from the surface-patch to the hillslope scales. Overall, our results demonstrate the usefulness of applying structuraland functional-connectivity metrics for practical applications and for assessing the complex links and controlling factors that regulate the transference of both surface water and sediments across different landscape scales. © Author(s) 2020.
语种	英语
scopus关键词	Rain; Regression analysis; Sediments; Topography; Vegetation; Functional connectivity; General linear models; Long-term development; Precipitation events; Runoff and sediment yields; Runoff and sediments; Structural connectivity; Vegetation distribution; Runoff; connectivity; hillslope; Mediterranean environment; path analysis; precipitation intensity; runoff; sediment transport; sediment yield; surface water; vegetation cover
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159388
作者单位	Moreno-De-Las-Heras, M., Institute of Environmental Assessment and Water Research (IDAEA CSIC), Barcelona, 08034, Spain, Desertification Research Centre (CIDE CSIC-UV-GV), Moncada, Valencia, 46113, Spain; Merino-Martín, L., University of Montpellier, AMAP, INRAE, CIRAD, CNRS, IRD, PS2 TA/A51, Montpellier Cedex 5, 34 398, France, CEFE, Univ. Montpellier, CNRS, EPHE, IRD, Univ. Paul Valéry, Montpellier, France; Saco, P.M., Civil, Surveying and Environmental Engineering, University of Newcastle, 2308 Callaghan, New South Wales, Australia, Centre for Water Security and Environmental Sustainability, University of Newcastle, 2308 Callaghan, New South Wales, Australia; Espigares, T., Department of Life Sciences, Faculty of Sciences, University of Alcalá, Alcalá de Henares, Madrid, 28805, Spain; Gallart, F., Institute of Environmental Assessment and Water Research (IDAEA CSIC), Barcelona, 08034, Spain; Nicolau, J.M., Department of Agrarian and Environmental Sciences, Technological School, University of Zaragoza, ...
推荐引用方式 GB/T 7714	Moreno-De-Las-Heras M.,Merino-Martín L.,Saco P.M.,et al. Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems[J],2020,24(5).
APA	Moreno-De-Las-Heras M.,Merino-Martín L.,Saco P.M.,Espigares T.,Gallart F.,&Nicolau J.M..(2020).Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems.Hydrology and Earth System Sciences,24(5).
MLA	Moreno-De-Las-Heras M.,et al."Structural and functional control of surface-patch to hillslope runoff and sediment connectivity in Mediterranean dry reclaimed slope systems".Hydrology and Earth System Sciences 24.5(2020).