Abstract:

Abstract: This paper divides the arid extent by using precipitation anomaly equation from 1971 to2000, analysis the arid distribution law in different period, study on the corn arid disaster risk index DDRI and zoning by using human survival environmental risk assessment method and GIS technology. The research results as followed: (1) the occurrence frequency of general and strong arid disaster are highest in 1970s, 1990s as followed, the lowest in 1980s in Heilongjiang province; (2) the high risk region of corn arid disaster centralized in the west of Heilongjiang province namely Qiqihar and Daqing region, this region is the important agricultural arid defense region, the low risk and lower risk region most distribute in the middle region and the east plain.