Land degradation/Data uncertainties limitations: Difference between revisions
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|Description=<h2>Data, uncertainties and limitations </h2> | |Description=<h2>Data, uncertainties and limitations </h2> | ||
Both modules use the harmonised world soil database ([[HWSD database|HWSD]]), ([[FAO et al., 2009]]), and module B also uses the [[WISE database|WISE]] soil profile database ([[Batjes, 2009]]), and the derived [[S- | Both modules use the harmonised world soil database ([[HWSD database|HWSD]]), ([[FAO et al., 2009]]), and module B also uses the [[WISE database|WISE]] soil profile database ([[Batjes, 2009]]), and the derived [[S-World database]] ([[Stoorvogel, 2014]]; [[Stoorvogel et al., in preparation]]). Although the HWSD and WISE databases are the most up-to-date sources of global soil data, they are still uncertain, especially for managed soils, and their base data have a rather course resolution. | ||
Both modules are greatly simplified representations of land degradation and its potential impacts. For module A on Water Erosion, the largest uncertainty relates to the rather coarse resolution of the terrain erodibility, as small-scale terrain characteristics determine erodibility, but are not captured in global data sets. In addition, the intensities of rainfall events are very uncertain, and here are assumed to be only a function of monthly rainfall and number of wet days per month. | Both modules are greatly simplified representations of land degradation and its potential impacts. For module A on Water Erosion, the largest uncertainty relates to the rather coarse resolution of the terrain erodibility, as small-scale terrain characteristics determine erodibility, but are not captured in global data sets. In addition, the intensities of rainfall events are very uncertain, and here are assumed to be only a function of monthly rainfall and number of wet days per month. |
Revision as of 21:01, 19 May 2014
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