This paper calculates the risk probability of strong wind by information diffusion theory, draws the risk zoning map by GIS technology, and then analyses the temporal and spatial distribution of strong winds in 78 counties or cities of Heilongjiang Province during 1971-2005. The results are shown as follows. (1) There were fluctuations of strong wind occurrence in Heilongjiang in the 1970s and 1980s. The occurrence of strong winds has been decreased noticeably from the 1990s to the early 21st century. Strong winds occurred mostly in spring, which was the main reason having drought and fire risks. (2) The high values of the number of strong wind days were mainly observed in Songnen plain and Sanjiang plain, and the low values appeared in Da Hinggan, Yichun and Mudanjiang. (3) The strong wind risk probabilities of 1d, 2d, 3d and 4d have been calculated by information diffusion theory. The areas with high risks were distributed in the central-southern parts of Heilongjiang as a zone from west to east, and those with low values were located in the northern, central-northern, western and southern parts. This paper takes the advantages of information diffusion theory, which requires less information and can evaluate the risks and loss risks.
ZHANG Lijuan, CHEN Hong, GAO Yuhong, MAYanmin, MAJun
. Study on the Distribution and Risk Zoning of Strong Winds in Heilongjiang Province[J]. PROGRESS IN GEOGRAPHY, 2011
, 30(7)
: 899
-905
.
DOI: 10.11820/dlkxjz.2011.07.016
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