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Abstract

In 1999, the Universal Soil Loss Equation (USLE) was applied by the European Soil Bureau to produce a soil erosion risk map of Italy. But the regional erosion estimates should be used with caution, as the uncertainty involved in the model predictions is not known. In this paper, sedimentation records from lakes and reservoirs, made available by the ISSDS, have been used to validate the soil erosion risk map of Italy. More than 20 reservoirs were geo-referenced via the Corine Land Cover map. The contributing area of each drainage basin was delineated, sediment delivery ratios were assessed and the observed and predicted exported sediment volumes were compared.

The results show that:
1) The variation accounted for in the predicted values by validation with the observed values is 62%;
2) Soil erosion and sediment export are overpredicted by the model in alpine mountain basins under forest.
3) If the data from the alpine drainage basins are left out of the data set the variation accounted for in predicted values is 70%.

Additional information

Authors: VAN ROMPAEY A J J, Physical and Regional Geography, K..U.Leuven (BE);GOVERS G, Physical and Regional Geography, K..U.Leuven (BE);JONES R J A, European Commission, Joint Research Council, Institute for Environment and Sustainability, Soil and Waste Unit, Ispra (IT);MONTANARELLA L, European Commission, Joint Research Council, Institute for Environment and Sustainability, Soil and Waste Unit, Ispra (IT);BAZZOFFI P, Istituto Sperimentale per lo Studio e la Difesa del Suolo (ISSDS), Firenze (IT)
Bibliographic Reference: EUR 20676 EN (2003), 21pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9843 or +39 033278 9864 Fax: +39 033278 9623 E-mail: jrc-publications-office@ec.europa.eu
Record Number: 200316477 / Last updated on: 2003-07-28
Category: PUBLICATION
Original language: en
Available languages: en