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Universiteit Gent (2006)

ASSESSMENT OF SOIL EROSION IN DRYLANDS OF COLOMBIA

Neira Mendez Fredy Hernando

Titre : ASSESSMENT OF SOIL EROSION IN DRYLANDS OF COLOMBIA

Auteur : Neira Mendez Fredy Hernando

Université de soutenance : Universiteit Gent

Grade : Master of Science (MS) Physical Land Resources 2006

Résumé
With meteorological data of 391 stations the Lang (1915), Thornthwaite (1948), De Martonne (1926), Emberger (1930), UNEP (1997) and Bagnouls-Gaussen (1957) indices are used to determine drylands in seven zones of Colombia. Only the Lang, UNEP and Thornthwaite indices show drylands in Colombia. Aggressivity of rainfall is evaluated using the Modified Fournier Index (Arnoldus, 1980). The Caribbean, Magdalena, Santanderes and Nariño have high rainfall aggressivity. Seasonality of rainfall is evaluated using the Precipitation Concentration Index (Oliver, 1980). For almost all the zones, the areas with high seasonality are those classified as drylands The Erosivity index is estimated using the CORINE (1995) methodology. The Caribbean zone shows a high erosivity index. Santanderes, Nariño and Magdalena zones have moderate to high values.

Source : Pedon 18 - Physical Land Resources - Universiteit Gent

Page publiée le 10 janvier 2016, mise à jour le 25 janvier 2018