Abstract:

With the land desertification sensitivity of the south-west Heilongjiang provence as a research object ,five factors, such as molsture index, the soil types, days of wind speed>6 m/s, vegetation covering degree and fragmentation are chosen to assess the desertification sensitivity based on GIS. Five classes of land desertification sensitivity ranging from low to extreme were generated: non-sensitivity zone, low sensitivity zone, moderate sensitivity zone, high sensitivity zone and extreme sensitivity zone.The result show that about 88.9% of study area are low sensitivity or moderate sensitivity,15.3% of which is in high sensitivity and non in extreme sensitivity; the desertification sensitivity in the whole region is decreasing from south-west to north-east from the spatial distribution; At last the advices and countermeasures for different zones are put forward .