Research Article

Analysis of Spatial and Temporal Distribution Characteristics of Land Desertification Based on GIS and Remote Sensing Images

Table 3

Classification system of land desertification in northern China.

Types of desertificationVegetation coverageWind erosion thickness of land (cm)Aeolian deposition of land (cm)Soil erosion (1/hm2·y)Population overload rate (%)Livestock overload rate (%)

Mild desertification40–60%<5<5<0.5−50∼31−50∼31

Moderate desertification25–40%5∼105∼100.5∼1.0−31∼0−31∼0

Severe desertification10–25%10∼2010∼201.0∼3.00∼310∼31

Extremely severe desertification<10%>20>20>3.0>31>31