inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Changing 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
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)