20世纪下半叶新疆洪水灾害的新趋向

受全球气候变暖和当地人类活动加剧的影响,20世纪下半叶以来,尤其80年代以来新疆洪灾在时空分布上,发生了比较明显的变化,呈现出一些新的趋向.这些新趋向突出表现在:与前30年(1950-1979年)相比,洪灾农田受灾面积增大、发生次数增多、直接经济损失明显上升以及洪灾多发区向北疆西部和天山南北麓集中.

New Tendency in Flood Disasters in Xinjiang during the Second Half of the 20th Century

Affected by the global warming and increase in human activities, evident changes in spatial and temporal distribution of flood disasters in Xinjiang since the second half of the 20th century, especially since the 1980s. It shows a new trend that, in the 1980s, the flooded area, the numbers of flood and direct economic losses increases relative to the preceding 30 years and the flood-prone areas concentrate toward the eastern part of northern Xinjiang and southern and northern feet of the Tianshan Mountain.