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Comparative study of climate and human impacts on seasonal baseflow in urban and agricultural watersheds

Identifieur interne : 000829 ( Istex/Corpus ); précédent : 000828; suivant : 000830

Comparative study of climate and human impacts on seasonal baseflow in urban and agricultural watersheds

Auteurs : Dingbao Wang ; Ximing Cai

Source :

RBID : ISTEX:6FF25F8D163C9EEE9FCDED5C0989BA1F3B1E4934

Abstract

This study explores the long‐term trends of low flow magnitude and the slopes and shapes of the recession curves during winter and summer seasons under climatic and human factors. Four watersheds in the American Midwest are selected for the analysis, including two urban watersheds (Salt Creek and Des Plaines) and two agricultural watersheds (Embarras and Kankakee). The results show that the long‐term baseflow recession slope trends in all the watersheds are primarily induced by human interferences. In the urban watersheds, the recession slopes decrease over time in both winter and summer due to effluent discharges. In the Kankakee watershed with irrigation, the recession slopes decrease in winter but increase in summer, and the opposite winter and summer trends are caused by the seasonal water use regime of irrigated agriculture. In the Embarras watershed with rainfed agriculture, the recession slopes decrease over time in winter but display no change in summer. Sources of water withdrawal (groundwater versus surface water) also have different impacts on the recession process. This long‐term analysis of recession rates, in conjunction with the changes in low flow magnitude, offers valuable insight on human interferences to hydrologic processes. Beyond the specific case studies, this paper documents how a scientific approach based on existing streamflow observation can be applied to improving our understanding of the impact of human and climatic influences on baseflow and low flow processes.

Url:
DOI: 10.1029/2009GL041879

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<mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0002-ts01"></mediaResource>
<caption>Table S1. The Mann‐Kendall non‐parametric test for trends. Details of Mann‐Kendall test can be found from
<link href="#grl26774-bib-0008">
<i>Sahoo and Smith</i>
[2009]</link>
.</caption>
</supportingInfoItem>
<supportingInfoItem>
<mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0003-ts02"></mediaResource>
<caption>Table S2. The Student's t‐test for three time periods.</caption>
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<mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0004-fs01"></mediaResource>
<caption>Figure S1. Map of Salt Creek, Des Plaines River, Kankakee River, and Embarras River watersheds.</caption>
</supportingInfoItem>
<supportingInfoItem>
<mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0005-fs02"></mediaResource>
<caption>Figure S2. The mean winter temperature.</caption>
</supportingInfoItem>
<supportingInfoItem>
<mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0006-fs03"></mediaResource>
<caption>Figure S3. The mean summer temperature.</caption>
</supportingInfoItem>
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<mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0007-fs04"></mediaResource>
<caption>Figure S4. The annual precipitation, total precipitation in winter and summer season.</caption>
</supportingInfoItem>
<supportingInfoItem>
<mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0008-fs05"></mediaResource>
<caption>Figure S5. The surface water withdrawals vs. groundwater pumping in the part of the Kankakee watershed located in Indiana from 1985–2006.</caption>
</supportingInfoItem>
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<mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:00948276:media:grl26774:grl26774-sup-0009-t01"></mediaResource>
<caption>Tab‐delimited Table 1.</caption>
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<p xml:id="grl26774-para-0005" label="1">This study explores the long‐term trends of low flow magnitude and the slopes and shapes of the recession curves during winter and summer seasons under climatic and human factors. Four watersheds in the American Midwest are selected for the analysis, including two urban watersheds (Salt Creek and Des Plaines) and two agricultural watersheds (Embarras and Kankakee). The results show that the long‐term baseflow recession slope trends in all the watersheds are primarily induced by human interferences. In the urban watersheds, the recession slopes decrease over time in both winter and summer due to effluent discharges. In the Kankakee watershed with irrigation, the recession slopes decrease in winter but increase in summer, and the opposite winter and summer trends are caused by the seasonal water use regime of irrigated agriculture. In the Embarras watershed with rainfed agriculture, the recession slopes decrease over time in winter but display no change in summer. Sources of water withdrawal (groundwater versus surface water) also have different impacts on the recession process. This long‐term analysis of recession rates, in conjunction with the changes in low flow magnitude, offers valuable insight on human interferences to hydrologic processes. Beyond the specific case studies, this paper documents how a scientific approach based on existing streamflow observation can be applied to improving our understanding of the impact of human and climatic influences on baseflow and low flow processes.</p>
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<title>Comparative study of climate and human impacts on seasonal baseflow in urban and agricultural watersheds</title>
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<title>BASEFLOW RECESSION SLOPE TREND</title>
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<titleInfo type="alternative" contentType="CDATA" lang="en">
<title>Comparative study of climate and human impacts on seasonal baseflow in urban and agricultural watersheds</title>
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<name type="personal">
<namePart type="given">Dingbao</namePart>
<namePart type="family">Wang</namePart>
<affiliation>Department of Civil and Environmental Engineering, University of Illinois at Urbana‐Champaign, Illinois, Urbana, USA</affiliation>
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<name type="personal">
<namePart type="given">Ximing</namePart>
<namePart type="family">Cai</namePart>
<affiliation>Department of Civil and Environmental Engineering, University of Illinois at Urbana‐Champaign, Illinois, Urbana, USA</affiliation>
<affiliation>E-mail: xmcai@illinois.edu</affiliation>
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<dateValid encoding="w3cdtf">2010-02-18</dateValid>
<edition>Wang, D., and X. Cai (2010), Comparative study of climate and human impacts on seasonal baseflow in urban and agricultural watersheds, Geophys. Res. Lett., 37, L06406, doi:10.1029/2009GL041879.</edition>
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<abstract>This study explores the long‐term trends of low flow magnitude and the slopes and shapes of the recession curves during winter and summer seasons under climatic and human factors. Four watersheds in the American Midwest are selected for the analysis, including two urban watersheds (Salt Creek and Des Plaines) and two agricultural watersheds (Embarras and Kankakee). The results show that the long‐term baseflow recession slope trends in all the watersheds are primarily induced by human interferences. In the urban watersheds, the recession slopes decrease over time in both winter and summer due to effluent discharges. In the Kankakee watershed with irrigation, the recession slopes decrease in winter but increase in summer, and the opposite winter and summer trends are caused by the seasonal water use regime of irrigated agriculture. In the Embarras watershed with rainfed agriculture, the recession slopes decrease over time in winter but display no change in summer. Sources of water withdrawal (groundwater versus surface water) also have different impacts on the recession process. This long‐term analysis of recession rates, in conjunction with the changes in low flow magnitude, offers valuable insight on human interferences to hydrologic processes. Beyond the specific case studies, this paper documents how a scientific approach based on existing streamflow observation can be applied to improving our understanding of the impact of human and climatic influences on baseflow and low flow processes.</abstract>
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<topic>baseflow recession slope</topic>
<topic>climate and human impacts</topic>
<topic>urban and agricultural watersheds</topic>
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<title>Geophysical Research Letters</title>
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<title>Geophys. Res. Lett.</title>
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<note type="content"> Auxiliary material for this article contains includes 2 tables and 5 figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains includes 2 tables and 5 figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains includes 2 tables and 5 figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt. Auxiliary material for this article contains includes 2 tables and 5 figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). See Plugins for a list of applications and supported file formats. Additional file information is provided in the readme.txt.Supporting Info Item: readme.txt - Table S1. The Mann‐Kendall non‐parametric test for trends. Details of Mann‐Kendall test can be found from . - Table S2. The Student's t‐test for three time periods. - Figure S1. Map of Salt Creek, Des Plaines River, Kankakee River, and Embarras River watersheds. - Figure S2. The mean winter temperature. - Figure S3. The mean summer temperature. - Figure S4. The annual precipitation, total precipitation in winter and summer season. - Figure S5. The surface water withdrawals vs. groundwater pumping in the part of the Kankakee watershed located in Indiana from 1985–2006. - Tab‐delimited Table 1. - </note>
<subject>
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<topic authorityURI="http://psi.agu.org/taxonomy5/1800">HYDROLOGY</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/1834">Human impacts</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/1860">Streamflow</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/1804">Catchment</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/1807">Climate impacts</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/4323">Human impact</topic>
<topic authorityURI="http://psi.agu.org/taxonomy5/4321">Climate impact</topic>
</subject>
<subject>
<genre>article-category</genre>
<topic>Hydrology and Land Surface Studies</topic>
</subject>
<identifier type="ISSN">0094-8276</identifier>
<identifier type="eISSN">1944-8007</identifier>
<identifier type="DOI">10.1002/(ISSN)1944-8007</identifier>
<identifier type="CODEN">GPRLAJ</identifier>
<identifier type="PublisherID">GRL</identifier>
<part>
<date>2010</date>
<detail type="volume">
<caption>vol.</caption>
<number>37</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>6</number>
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<accessCondition type="use and reproduction" contentType="copyright">Copyright 2010 by the American Geophysical Union.</accessCondition>
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