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2nd Revision

Introduction

 
Data - Soil Erosion
Soil Degradation in China by Degradation Type According to ASSOD Assessment (in mio. hectares)
    Negligible Light Moderate Strong Extreme  
Water Erosion Loss of Topsoil (Wt) 15.8 105.9 44.9 3.8 0.2  
Terrain Deformation (Wd) 0.5 7.9 5.9 24.0 -  
Off-site Effects (Wo) 0.2 0.2 0.2 - -  
Wind Erosion Loss of Topsoil (Et) 1.7 65.9 2.5 + +  
Terrain Deformation (Ed) + 7.2 5.5 57.9 -  
Off-site Effects (Eo) + 2.0 6.5 0.2 -  
Chemical Deterioration Fertility Decline (Cn) 32.4 31.7 4.8 - -  
Salinisation (Cs) 0.5 6.8 2.6 - -  
Dystrification (Ct) - + - - -  
Physical Deterioration Aridification (Pa) - 23.7 - - -  
Compaction and Crusting (Pc/Pk) - 0.5 - - -  
Waterlogging (Pw) 3.8 - - - -  
Total Degradation All Types 55.0 251.9 72.9 86.0 0.25  
Source: Lynden, G.W.J. / Oldeman, L.R. (1997): The assessment of the status of human-induced soil degradation in South and Southeast Asia. United Nations Environment Program (UNEP), Food and Agricultural Organization of the United Nations (FAO), International Soil Reference and Information Centre (ISRIC), Wageningen, The Netherlands
Note: (-) no significant occurrence; (+) Less than 0.1 but more than 0.01 million hectares; for calculation of the totals we have assumed that (+) is equivalent to 0.05 million hectares.
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Revision 2.0 (First revision published in 1999)  - Copyright 2011 by Gerhard K. Heilig. All rights reserved. (First revision: Copyright 1999 by IIASA.)