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-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 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

link to framework components overview

Parts of Land degradation/Data uncertainties limitations

  1. Introduction page
  2. Model description
  3. Policy issues
  4. Data, uncertainty and limitations
  5. Overview of references
Component is implemented in:
Components:
Related IMAGE components
Projects/Applications
Models/Databases
Key publications
References
Two approaches to assess land degradation in IMAGE 3.0
Flowchart Land degradation. See also the Input/Output Table on the introduction page.
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