Evaluating the influence of physical, economic and managerial factors on sheet erosion in rangelands of SW Spain by performing a sensitivity analysis on an integrated dynamic model
Autor: | Susanne Schnabel, Javier Ibáñez, J. Martínez Valderrama, J. F. Lavado Contador |
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Rok vydání: | 2015 |
Předmět: |
Topsoil
geography Environmental Engineering geography.geographical_feature_category business.industry Environmental resource management Variance (land use) Climate change 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences Pollution Pasture Stocking Soil water 040103 agronomy & agriculture Erosion 0401 agriculture forestry and fisheries Environmental Chemistry Environmental science Rangeland business Water resource management Waste Management and Disposal 0105 earth and related environmental sciences |
Zdroj: | The Science of the total environment. 544 |
ISSN: | 1879-1026 |
Popis: | An integrated dynamic model was used to evaluate the influence of climatic, soil, pastoral, economic and managerial factors on sheet erosion in rangelands of SW Spain (dehesas). This was achieved by means of a variance-based sensitivity analysis. Topsoil erodibility, climate change and a combined factor related to soil water storage capacity and the pasture production function were the factors which influenced water erosion the most. Of them, climate change is the main source of uncertainty, though in this study it caused a reduction in the mean and the variance of long-term erosion rates. The economic and managerial factors showed scant influence on soil erosion, meaning that it is unlikely to find such influence in the study area for the time being. This is because the low profitability of the livestock business maintains stocking rates at low levels. However, the potential impact of livestock, through which economic and managerial factors affect soil erosion, proved to be greater in absolute value than the impact of climate change. Therefore, if changes in some economic or managerial factors led to higher stocking rates in the future, significant increases in erosion rates would be expected. |
Databáze: | OpenAIRE |
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