Water and nitrate balance in a poorly drained forested and agricultural watershed
| Autor: | François Birgand, Julien Tournebize, Cyril Kao, Claire Billy |
|---|---|
| Přispěvatelé: | Hydrosystèmes et Bioprocédés (UR HBAN), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Hydrology
Agricultural watershed Biogeochemical cycle Watershed Land use NITROGEN RETENTION business.industry BIOGEOCHEMICAL PROCESSES 15. Life on land PROCESSUS BIOGEOCHIMIQUE 6. Clean water chemistry.chemical_compound Nitrate chemistry Agriculture [SDE]Environmental Sciences RETENTION DE NITRATE Environmental science Drainage business Time of concentration |
| Zdroj: | International Conference Hydrology and Management of Forested Wetlands, USA, New Bern NC, 8-12 Avril 2006 International Conference Hydrology and Management of Forested Wetlands, USA, New Bern NC, 8-12 Avril 2006, 2006, pp.9 Scopus-Elsevier |
| Popis: | The aim of this research was to characterize the biogeochemical functioning of isolated first order watersheds of forested, agricultural and mixed land use and to locate the compartments where nitrogen retention may occur at this scale. Three first order catchments were studied. An agricultural watershed of 1.3 km², a forested watershed of 1.1 km² and a mixed land use watershed of 1.7 km² containing the agricultural watershed and a forested area downstream. The forested watershed (named F) served as a reference for the nitrate contribution of a forested area in order to understand the transfer and maybe the retention of nitrogen in the forested area of the mixed land use watershed. Flow rates and nitrate concentrations have been monitored at the outlets of the catchments. A first scheme of the hydrological behavior of the mixed land use watershed has been established. Moreover, the dry winter season 2004-2005 allowed to find and estimate deep contributions, which most likely interfere with the general hydrological functioning of the watershed and hide possible retention processes. In an effort to identify the origin and processes undergone by nitrate molecules, 15N and 18O isotopic analyses will be performed in the future. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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