近20年吉林西部水旱灾害变化特征及机理研究

吉林西部水旱灾害频繁发生。特别是自1980年以来,水旱灾害造成的成灾面积及其损失呈快速增长的趋势,这与我国和世界其它地区水旱灾害增多的趋势相一致。以往大多认为这一趋势是全球变化和自然因素引起的。文章通过对吉林西部人类活动与生态环境的互动关系研究,发现造成这一趋势的原因是人类对自然不合理活动所引起的生态环境退化如土地的沙漠化、盐碱化,草地的严重退化和社会其它因素。

Research on Character and Mechanism of Flood and Drought Disaster in West of Jilin Province in Recently 20 Years

The disaster of flood and drought usually occur in west Jilin province. Since 1980's, there is speediness increase trend of flood and drought calamities, which is concordant with what is occurring in China or in the world. The global changing and the other natural factors are usually considered as the cause of the trend. However, the environmental degradation brought by local human activities and the others social factors is main reasons of the trend. Therefore, the aim of this paper is to analyse the human causes of recent increase of the flood and drought disaster in west Jilin province based on some statistic data. The local climate is going to develop for aridity on the condition of the global warming and the flood outburst. The losing can be decreased if control measure is adopted.