Title
The PESERA coarse scale erosion model for Europe. I. - model rationale and implementation
Description
The principles and theoretical background are presented for a new process-based model (PESERA) that is designed to estimate long-term average erosion rates at 1 km resolution and has, to date, been applied to most of Europe. The model is built around a partition of precipitation into components for overland flow (infiltration excess, saturation excess and snowmelt), evapo-transpiration and changes in soil moisture storage. Transpiration is used to drive a generic plant growth model for biomass, constrained as necessary by land use decisions, primarily on a monthly time step. Leaf fall, with corrections for cropping, grazing, etc., also drives a simple model for soil organic matter. The runoff threshold for infiltration excess overland flow depends dynamically on vegetation cover, organic matter and soil properties, varying over the year. The distribution of daily rainfall totals has been fitted to a Gamma distribution for each month, and drives overland flow and sediment transport (proportional to the sum of overland flow squared) by summing over this distribution. Total erosion is driven by erodibility, derived from soil properties, squared overland flow discharge and gradient; it is assessed at the slope base to estimate total loss from the land, and delivered to stream channels.
URL
http://dx.doi.org/10.1111/j.1365-2389.2008.01072.x
URL Description
Abstract
Language
English
Author
Mike Kirkby
Author
Brian Irvine
Author
R.J.A. Jones
Author
G. Govers

soil erosion; modelling

Volume number
59
Issue number
6
Is this item peer reviewed?
No
ISSN
1351-0754
Copyright URL
http://olabout.wiley.com/WileyCDA/Section/id-406241.html
Publisher
Wiley-Blackwell
Date of publication
01 January 2008
Number of pages
14
Page reference
1293-1306
Place of publication
Chichester
Is this item a pre-print or post-print?
Postprint
Title of journal
European journal of soil science
Harvard
Kirkby, Mike et al (2008) The PESERA coarse scale erosion model for Europe. I. - model rationale and implementation. European journal of soil science. 59 (6), pp. 1293-1306 Chichester: Wiley-Blackwell.
Vancouver
Kirkby Mike et al. The PESERA coarse scale erosion model for Europe. I. - model rationale and implementation. European journal of soil science 2008; 59 (6): 1293-1306.