Arid
DOI10.1016/j.jhydrol.2012.11.054
Land cover controls on summer discharge and runoff solution chemistry of semi-arid urban catchments
Gallo, Erika L.1; Brooks, Paul D.1; Lohse, Kathleen A.2; McLain, Jean E. T.3,4
通讯作者Gallo, Erika L.
来源期刊JOURNAL OF HYDROLOGY
ISSN0022-1694
EISSN1879-2707
出版年2013
卷号485页码:37-53
英文摘要

Recharge of urban runoff to groundwater as a stormwater management practice has gained importance in semi-arid regions where water resources are scarce and urban centers are growing. Despite this trend, the importance of land cover in controlling semi-arid catchment runoff quantity and quality remains unclear. Here we address the question; How do land cover characteristics control the amount and quality of storm runoff in semi-arid urban catchments? We monitored summertime runoff quantity and quality from five catchments dominated by distinct urban land uses: low, medium, and high density residential, mixed use, and commercial. Increasing urban land cover increased runoff duration and the likelihood that a rainfall event would result in runoff, but did not increase the time to peak discharge of episodic runoff. The effect of urban land cover on hydrologic responses was tightly coupled to the magnitude of rainfall. At distinct rainfall thresholds, roads, percent impervious cover and the stormwater drainage network controlled runoff frequency, runoff depth and runoff ratios. Contrary to initial expectations, runoff quality did not vary in repose to impervious cover or land use. We identified four major mechanisms controlling runoff quality: (1) variable solute sourcing due to land use heterogeneity and above ground catchment connectivity; (2) the spatial extent of pervious and biogeochemically active areas; (3) the efficiency of overland flow and runoff mobilization; and (4) solute flushing and dilution. Our study highlights the importance of the stormwater drainage systems characteristics in controlling urban runoff quantity and quality; and suggests that enhanced wetting and in-stream processes may control solute sourcing and retention. Finally, we suggest that the characteristics of the stormwater drainage system should be integrated into stormwater management approaches. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Urban Runoff Water quality Land use Semi-arid
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000317545200004
WOS关键词WET-WEATHER FLOWS ; SONORAN DESERT ; ATMOSPHERIC DEPOSITION ; WATER-QUALITY ; STORMWATER RUNOFF ; STREAM ECOLOGY ; TRACE-METALS ; HOT MOMENTS ; RAINFALL ; SURFACE
WOS类目Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Engineering ; Geology ; Water Resources
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/178495
作者单位1.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA;
2.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA;
3.USDA ARS, US Arid Land Agr Res Ctr, Maricopa, AZ 85138 USA;
4.Univ Arizona, Water Resources Res Ctr, Tucson, AZ 85719 USA
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Gallo, Erika L.,Brooks, Paul D.,Lohse, Kathleen A.,et al. Land cover controls on summer discharge and runoff solution chemistry of semi-arid urban catchments[J]. University of Arizona,2013,485:37-53.
APA Gallo, Erika L.,Brooks, Paul D.,Lohse, Kathleen A.,&McLain, Jean E. T..(2013).Land cover controls on summer discharge and runoff solution chemistry of semi-arid urban catchments.JOURNAL OF HYDROLOGY,485,37-53.
MLA Gallo, Erika L.,et al."Land cover controls on summer discharge and runoff solution chemistry of semi-arid urban catchments".JOURNAL OF HYDROLOGY 485(2013):37-53.
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