ABSTRACT

ABSTRACT: The fire points occurred in East Ujimqin county on April 7 and 8 of 2012 was extracted by employing DMSP/OLS night-time imagery based on the method of mutation detection under the support of ArcGIS 9.3. The critical threshold value of the fire on April 7 and 8 are 11 and 13. The result shows that the fire accident was occurred in Bogod forest farm, Hexiguul pasture and Manduhbolog town located at the north border of the East Ujimqin that was neighboring southern Mongolia. On April 8, 2012, the fire spread out quickly along Erengom town, Bayanhobur town and Samai town. Totally, the grassland fire burned the area of seven towns of East Ujimqin and was defined as a serious grassland fire.