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Presentation

2nd Revision

Introduction

 
Data
ASSOD Soil Degradation Assessment: Extent of Stable Soils (All Types of Land)
Source: Van Lynden, G.W.J. / Oldeman, L.R. (1997): The assessment of the status of human-induced soil degradation in south and south-east Asia. United Nations Environment Programme (UNEP), Food and Agricultural Organization of the United Nations (FAO), International Soil Reference and Information Centre (ISRIC), Wageningen (digital map and data sets)
For the ASSOD assessment it is important to distinguish the extent of soil degradation from the intensity or degree of its impact. This map only shows the extent of soil degradation - that is, which percentage of a particular land area is affected by soil degradation.
Only in the red areas all the land was classified as being affected by some kind of soil degradation. This includes degradation of various intensities - from extreme to negligible. It might well be that an area with a 100% extent of degradation (= no stable land) is affected only at a low or negligible degree.
Most land areas in China have a lower extent of soil degradation. Usually between 40 to 60 percent of the area is affected by some kind of degradation (light green, green). In southern, northern and north-western China one can find large areas, were soil degradation affects less than 20% of the land (dark green).
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Related Maps

Population Density (3 Maps)blank_3.gif (810 bytes)Digital Elevation Maps (2 Maps)blank_3.gif (810 bytes)Main Rivers in Chinablank_3.gif (810 bytes)blank_3.gif (810 bytes)blank_3.gif (810 bytes)Precipitation ( 7 Successive Maps)blank_3.gif (810 bytes)Animation of Precipitation Levelsblank_3.gif (810 bytes)blank_3.gif (810 bytes)blank_3.gif (810 bytes)Crop Cultivation ( 8 Maps)blank_3.gif (810 bytes)Selected Agricultural Indicators ( 9 Maps)blank_3.gif (810 bytes)Grassland Indicators (4 Maps)blank_3.gif (810 bytes)blank_3.gif (810 bytes)blank_3.gif (810 bytes)Soil Degradation: Stable Soils (4 Maps)blank_3.gif (810 bytes)Soil Degradation: Water Erosion (2 Maps)blank_3.gif (810 bytes)Soil Degradation: Physical & Chemical Deterioration (3 Maps)blank_3.gif (810 bytes)blank_3.gif (810 bytes)blank_3.gif (810 bytes)Land Use / Land Cover Mapsblank_3.gif (810 bytes)blank_3.gif (810 bytes)

Revision 2.0 (First revision published in 1999)  - Copyright 2011 by Gerhard K. Heilig. All rights reserved. (First revision: Copyright 1999 by IIASA.)