| A comparison of storm-based and annual-based indices of hydrologic variability: a case study in Fort Benning, Georgia. | |
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MedLine Citation:
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PMID: 19557534 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The magnitude, frequency, duration, timing, and rate of change of hydrologic conditions regulate ecological processes in aquatic ecosystems. Conditions are typically characterized using annual-based hydrologic indices derived from daily and/or monthly stream flow data. In this study, we present an alternative approach to identify hydrologic indices based on storm hydrographs. Hydrologic indices derived from long-term daily flow data were compared to those from storm events for two headwater watersheds in Fort Benning, Georgia. Five hydrologic indices derived from daily flow data and storm events shared common features. Storm-based magnitude of mean peak discharge and mean response factor, frequency of bankfull discharge, rate of change in mean slopes of rising, and falling limb of the hydrograph were consistent with the results from long-term daily flow data. The annual flow increases and decreases were well matched by stormflow rising and falling. Both indicators showed one watershed having three times the response rates as compared to the other. Results suggested that select storm-based indices may be used as surrogates to the indices derived from long-term data. |
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Authors:
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Shirish Bhat; Jennifer M Jacobs; Kirk Hatfield; Wendy D Graham |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. Date: 2009-06-26 |
Journal Detail:
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Title: Environmental monitoring and assessment Volume: 167 ISSN: 1573-2959 ISO Abbreviation: Environ Monit Assess Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-09 Completed Date: 2010-10-07 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508350 Medline TA: Environ Monit Assess Country: Netherlands |
Other Details:
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Languages: eng Pagination: 297-307 Citation Subset: IM |
Affiliation:
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Department of Civil and Coastal Engineering, University of Florida, Gainesville, FL 32611, USA. shirish.bhat@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Environmental Monitoring* Georgia Rivers* Water Movements |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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