| In this paper,collected data's of gale disaster of 5 provinces in Southern Xinjiang from 1949 to 2008,based on 18 types of indexes as occurring time of gale disaster,Duration(day),endured arable land area,economical loss, injuries and deaths, collapsed houses and huts,wind forces as well. Chose indexes of occurring time of gale disaster and Duration on the rule of perfectness of the data's. using the formula of gale disaster degree and MapInfo7.0 made the map of gale disaster degree values(Dmax) of provinces in Southern Xinjiang During 1949～2008. Meanwhile based on the data about occurring time,duration,spatial changing characters of gale disaster in Southern Xinjiang during 1949~2008 is analyzed. The result showed that: Heavy degree, common degree and light degree of gale disaster are included in the gale disasters types of provinces and whole southern Xinjiang,so in order to make the damages and the danger to the lowest level, the gale disaster should be considered in the courses of developing agriculture,shepherd,garden-forestry, water conservation project,construction as well as city planning in these gale disaster area; At the same time,local government should publicize the disadvantages and disasters of gale to the public frequently in the consideration of soil desertification and solemnization,reducing of forests and grassland area. the characters of gale disaster in Southern Xinjiang can be divided into 4 phases as follows 1949~1966,1967~1979,1980~1997 and 1998~2008; based on their characters it can be known that gale disaster in the first 3 phases show fluctuate increasing trend on the whole of occurring time and duration although have shown increasing or decreasing trend respectively; during the 4th phase gale disaster in provinces and whole Southern Xinjiang show decreasing trend. Bazhou,Akesu and Kashi are regarded to be the most important areas in preventing from gale disaster as they have more occurring time and duration. Kezhou and Hetian are regarded to be the secondary areas in preventing from gale disaster as they have less occurring time and duration. The most occurring time and duration of gale disaster are shown in April and may,so May and April are the most important months of preventing from gale disaster. June is secondary important month of preventing from gale disaster as occurring time and duration of gale disaster in June are less than April. Occurring time and duration of gale disaster in July and August are same. Although occurring time and duration of gale disaster in February,March and November are lest,they can not be neglected.From the general analysis in this study, we can com to the conclusion that, under the condition that appearing time,duration of gale has not increased seriously, the gale disaster digree and indured land area has gradually increased. We can coclude the reason as follows: with the increasing trend of cultivated land, scaling up the cultivated land, changing the grass land into agricultural fields, gradually decreasing of grass lands and forests in the courses of cultivation has enhanced the ecological weakness of this area, decreased the capability of defendences against and recovering from gale and other natural disasters.So,local government should publicize the disadvantages and disasters of gail disaster to the public frequently in the consideration of soil desertification and solemnization,reducing of forests and grasslands; that will be helpful to form an integrity of community-environment-culture-economy and it will improve the developments of resources exploitation,tourism of Southern Xinjiang which is standing at golden time of development at a high speed under the leading of the policy of opening the western area of China. |
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