Hydrobiologia (1999) Salvia

Application of the 'snapshot' methodology to a basin-wide analysis of phosphorus and nitrogen at stable low flow

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référence bibliographique en cours de traitement

Titre Application of the 'snapshot' methodology to a basin-wide analysis of phosphorus and nitrogen at stable low flow Auteurs Mercé Salvia-Castellvi(i, ii), IFFLY (J. F.) (i), VANDER BORGHT (P.)(i); SARY (M.) (iii); HOFFMANN (L.)(iv); GARNIER (Josette)(v); MOUCHEL (Jean-Marie)(vi) Affiliations i - Centre de recherche public Gabriel Lippmann, CREBS, 162a, Avenue de la Faïencerie/1511 Luxembourg/Luxembourg ii - Fondation Universitaire Luxembourgeoise, 185, avenue de Longwy/6700 Arlon/Belgique (1 aut., 3 aut.); iii - Université de Metz, Centre d'Etudes Géographiques, Ile du Saulcy/57405 Metz/France iv - Université de Liège, Institut de Botanique (B.22), Sart Tilman/4000 Liège/Belgique (5 aut.); v - UMR Sisyphe 7619 CNRS/UPMC, 4 Place Jussieu/75005 Paris/France (1 aut.); vi- CEREVE, Ecole Nationale des Ponts et Chaussées, 6 & 8 av. Blaise Pascal, Cité Descartes/77455 Marne-la-Vallée/France Source Hydrobiologia : (La Haye); ISSN 0018-8158; Coden HYDRB8; Pays-Bas; Da. 1999; Vol. 410; Pp. 97-102; Bibl. 21 ref.

Résumé

The snapshot' sampling methodology was applied to the spatial analysis of phosphorus and nitrogen concentrations and fluxes in the transnational upper Sûre watershed (Belgium-Luxembourg) during stable low discharge summer periods in 1991 and 1992. The results show clear differences in nitrogen concentrations and specific loads between agricultural and forested sub-basins, whereas for phosphorus the dependence on land use is less evident. The simultaneous measurement of stream discharge and nutrient concentrations permitted a quantitative evaluation of the input from point respectively diffuse sources and loads from the tributaries as well as the retention capacity by self-purification or sedimentation of the different phosphorus and nitrogen forms in the various sections of the Sûre river. The results illustrate the utility of the snapshot' sampling as an important tool for an integrated watershed management.