Arid
DOI10.1002/hyp.9199
Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States
Gallo, Erika L.1,2; Brooks, Paul D.1; Lohse, Kathleen A.2,3; McLain, Jean E. T.4,5
通讯作者Gallo, Erika L.
来源期刊HYDROLOGICAL PROCESSES
ISSN1099-1085
出版年2013
卷号27期号:7页码:995-1010
英文摘要

Urban expansion and the scarcity of water supplies in arid and semiarid regions have increased the importance of urban runoff to localized water resources. However, urban catchment responses to precipitation are poorly understood in semiarid regions where intense rainfall often results in large runoff events during the short summer monsoon season. To evaluate how urban runoff quantity and quality respond to rainfall magnitude and timing, we collected stream stage data and runoff samples throughout the 2007 and 2008 summer monsoons from four ephemeral drainages in Tucson, Arizona. Antecedent rainfall explained 20% to 30% of discharge (mm) and runoff ratio in the least impervious (22%) catchment but was not statistically related to hydrologic responses at more impervious sites. Regression models indicated that rainfall depth, imperviousness and their combined effect control discharge and runoff ratios (p<0.01, r2=0.91 and 0.75, respectively). In contrast, runoff quality did not vary with imperviousness or catchment size. Rainfall depth and duration, time since antecedent rainfall and event and cumulative discharge controlled runoff hydrochemistry and resulted in five specific solute response patterns: (i) strong event and seasonal solute mobilization (solute flush), (ii) event chemostasis and strong seasonal flush, (iii) event chemostasis and weak seasonal flush, (iv) event and seasonal chemostasis and (v) late seasonal flush. Our results indicate that hydrologic responses of semiarid catchments are controlled by rainfall partitioning at the event scale, whereas wetting magnitude, frequency and timing alter solute stores readily available for transport and control temporal runoff quality. Copyright (c) 2012 John Wiley & Sons, Ltd.


英文关键词urban runoff semiarid water quality runoff ratio
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000316568000004
WOS关键词1ST FLUSH ANALYSIS ; CALCAREOUS SOILS ; SONORAN DESERT ; WATER-QUALITY ; STORM-RUNOFF ; PRECIPITATION DATA ; IMPERVIOUS COVER ; ORGANIC-CARBON ; ARID CLIMATE ; RIVER-BASIN
WOS类目Water Resources
WOS研究方向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/2XILL650/177521
作者单位1.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA;
2.Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA;
3.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA;
4.ARS, USDA, US Arid Land Agr Res Ctr, Maricopa, AZ 85138 USA;
5.Univ Arizona, Water Resources Res Ctr, Tucson, AZ 85719 USA
推荐引用方式
GB/T 7714
Gallo, Erika L.,Brooks, Paul D.,Lohse, Kathleen A.,et al. Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States[J]. University of Arizona,2013,27(7):995-1010.
APA Gallo, Erika L.,Brooks, Paul D.,Lohse, Kathleen A.,&McLain, Jean E. T..(2013).Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States.HYDROLOGICAL PROCESSES,27(7),995-1010.
MLA Gallo, Erika L.,et al."Temporal patterns and controls on runoff magnitude and solution chemistry of urban catchments in the semiarid southwestern United States".HYDROLOGICAL PROCESSES 27.7(2013):995-1010.
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