Hydrology of channelized and natural headwater streams / Hydrologie de cours d'eau recalibrés et naturels de tête de bassin
Authors:
- 1 October 2009
- journal article
- Published by Taylor & Francis in Hydrological Sciences Journal
- Vol. 54 (5) , 929-948
Abstract
Understanding hydrology of channelized and natural headwater streams is paramount for maintaining ecosystem function and natural flow regimes. Two channelized and two natural headwater streams located in Upper Big Walnut Creek (UBWC) watershed in Ohio, USA, were instrumented to facilitate measurement, characterization and comparison of hydrology to the accepted paradigm for headwater hydrology. Data were collected at 10-min intervals from 1 January 2005 to 31 December 2006. Differences in flow magnitudes (average, low and high) were generally greater (P < 0.05) in the channelized streams. Frequency of zero discharge and out-of-bank discharge was significantly greater in the natural streams. Zero discharge occurred in summer and out-of-bank flows occurred in winter. Rate of change variables indicated that channelized streams respond more quickly to rainfall, have significantly greater peak flows, and have slower recession times. In contrast, natural streams tend to be more “flashy”. The findings w... Résumé La compréhension de l'hydrologie des cours d'eau, recalibrés et naturels, de tête de bassin est déterminante pour maintenir les fonctions écosystémiques ainsi que les régimes naturels d'écoulement. Deux cours d'eau, de tête de bassin, naturels et deux recalibrés situés dans le bassin versant du Big Walnut Creek supérieur dans l'Ohio, Etats-Unis, ont été instrumentés pour faciliter la mesure, la caractérisation et la comparaison hydrologiques par rapport au paradigme consensuel de l'hydrologie des têtes de bassin. Les données ont été acquises à pas de temps de 10 minutes du 1er Janvier 2005 au 31 Décembre 2006. Les différences dans la magnitude de l'écoulement (moyen, faible et fort) sont généralement plus importantes (P < 0.05) dans les cours d'eau recalibrés. Les fréquences d'assèchement et de crue inondante sont significativement plus importantes dans les cours d'eau naturels. Des assèchements se sont produits en été et des crues inondantes ont eu lieu en hiver. Les taux de variation montrent que...Keywords
This publication has 41 references indexed in Scilit:
- Hydrologic Connectivity and the Contribution of Stream Headwaters to Ecological Integrity at Regional Scales1Jawra Journal of the American Water Resources Association, 2007
- A NEW FLASHINESS INDEX: CHARACTERISTICS AND APPLICATIONS TO MIDWESTERN RIVERS AND STREAMS1Jawra Journal of the American Water Resources Association, 2004
- CONNECTIVITY, FRAGMENTATION, AND EXTINCTION RISK IN DENDRITIC METAPOPULATIONSEcology, 2002
- Retention of NO $_3^ - $ in an upland streamenvironment: A mass balance approachBiogeochemistry, 1998
- Comparison of Benthic Macroinvertebrate Assemblages in Small Streams along a Gradient of Flow PermanenceJournal of the North American Benthological Society, 1996
- Modelling the hydrological impacts of open ditch drainageJournal of Hydrology, 1996
- Drainage and Water Quality in Great Lakes and Cornbelt StatesJournal of Irrigation and Drainage Engineering, 1995
- Biodiversity Conservation in Running WatersBioScience, 1993
- The impact of channelization on the hydrology of the upper river main, county antrim, northern Ireland—a long term case studyRegulated Rivers: Research & Management, 1990
- Nitrate loss and transformation in 2 vegetated headwater streamsNew Zealand Journal of Marine and Freshwater Research, 1984