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A model-based integrated assessment of land degradation by water erosion in a valuable Spanish rangeland |
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| Affiliation: | 1. Institute of Physics of Materials, ASCR, Žižkova 22, 616 00 Brno, Czech Republic;2. VŠB-Technical University of Ostrava, 17. Listopadu 15, 708 33 Ostrava 8, Czech Republic;3. Nuclear Physics Institute, ASCR, Husinec - Řež 130, 250 68 Řež, Czech Republic;4. Materials Research Centre, College of Engineering, Swansea University Bay Campus, Fabian Way, Swansea, Neath Port Talbot SA1 8QQ, UK;1. Institut für Mineralogie, GZG, Universität Göttingen, Goldschmidtstr.1, Göttingen, Germany;2. Istituto di Geologia Ambientale e Geoingegneria IGAG-CNR, Via Salaria km 29,300, Rome, Italy;3. Dipartimento di Scienze della Terra, Sapienza-Università di Roma, Piazzale Aldo Moro 5, Rome, Italy;1. Dipartimento di Scienze Agrarie e Forestali, Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy.;2. Dipartimento di Scienze della Terra e del Mare, Università degli Studi di Palermo, Via Archirafi, 90123 Palermo, Italy;1. Orthopaedics and Traumatology Department, University Hospital Reina Sofía, Calle Buenos Aires 5B, 14006 Córdoba, Spain;2. Animal experimentation service (SAEX), University of Cordoba, Spain;3. Internal Medicine Department, University Hospital Reina Sofía, Córdoba, Spain |
| Abstract: | This paper presents an integrated assessment model aimed at evaluating land degradation by water erosion in dehesa rangelands in the Iberian Peninsula. The model is built following the system dynamics approach. The degradation risk is likened to the probability of losing a certain amount of soil within a number of years, as estimated over a great number of stochastic simulations. Complementary indicators are the average times needed to lose different amounts of soil over the simulations. A group of exogenous factors are ranked in order of importance. These factors are mainly climatic and economic and potentially affect soil erosion. Calibration is carried out for a typical dehesa defined over 22 working units selected from 10 representative farms distributed throughout the Spanish region of Extremadura. The degradation risk turns out to be moderate. The importance of climatic factors on soil erosion considerably exceeds that of those linked to human activities. |
| Keywords: | Integrated assessment model System dynamics Land degradation Soil erosion Dehesa rangeland |
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