Mots-clés
Bassin-versant ; Bilan sédimentaire ; Brésil ; Charge en suspension ; Conservation des sols ; Erosion des sols ; Erosion hydrique ; Modèle ; Pratique culturale ; Rio Grande do Sul ; Utilisation du solAgricultural practice ; Brazil ; Land use ; Model ; Rio Grande do Sul ; Sediment budget ; Soil conservation ; Soil erosion ; Suspended load ; Water erosion ; WatershedAprovechamiento del suelo ; Balance sedimentario ; Carga en suspensión ; Conservación de los suelos ; Cuenca hidrográfica ; Erosión de los suelos ; Erosión hídrica ; Modelo ; Práctica de cultivoChanging sediment yield as an indicator of improved soil management practices in southern Brazil
Sediment sources and sediment delivery under environmental change. Special issue
Auteur(s) et Affiliation(s)
MINELLA, J.P.G.
Dep. Soils, Federal Univ., Santa Maria, Bresil
Inst. Hydraulic Research, Federal Univ. Rio Grande do Sul, Porto Alegre, Bresil
MERTEN, G.H.
Inst. Hydraulic Research, Federal Univ. Rio Grande do Sul, Porto Alegre, Bresil
WALLING, D.E.
Dep. of Geography, Univ., Exeter, Royaume-Uni
REICHERT, J.M.
Dep. Soils, Federal Univ., Santa Maria, Bresil
WALLING, D.E.
Dep. of Geography, Univ., Exeter, Royaume-Uni
BOGEN, J.
Norwegian Water Resources and Energy Directorate, Oslo, Norvege
PORTO, P.
Univ., Reggio Calabria, Italie
Description :
This study presents results from a hydrosedimentological monitoring project undertaken in a small rural catchment in Southern Brazil before and after the introduction of conservation tillage practices implemented by the RS-RURAL — Program Against Rural Poverty : use of winter cover crops and minimum tillage tobacco cultivation. Data on precipitation, runoff volume, maximum flow and sediment yield were assembled for representative storm events occurring between May 2002 and March 2006, and analyzed to identify changes in the storm runoff and storm-period sediment response of the study catchment. The results provide evidence of statistically significant reductions in storm runoff, maximum flow rate and sediment yield after implementation of the conservation practices. Sediment sources were also investigated using the fingerprinting technique. Results emphasize the complexity of the relationship between sediment yield, the effects of climactic variability, and changes in land use and management.
Type de document :
Article de monographie
Source :
Catena (Giessen), issn : 0341-8162, 2009, vol. 79, n°. 3, p. 228-236, nombre de pages : 9, Références bibliographiques : 0,5 p.
Date :
2009
Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)