关键词: 地貌结构, 沙尘暴, 灾害, 艾比湖

Abstract: Located in the southwestern part of the Junggar Basin, Xinjiang, the Ebinur Lake region is surrounded by mountains on its three sides and connects with a plain to the east. The ecology and the natural environment here have violently changed since the Quaternary period, especially since the Last Ice Age, in which the most spectacular change is the drawdown of water level and the corresponding reduction of the water area. At present the water area of the lake is only about 500 km² left, the lake has evolved to the salt lake stage, and the mineralization of lake water is as high as 97～117 g/l. Under the effects of hydrologic force, wind force and gravity, the Quaternary sediment including diluvial, alluvial, lacustrine and chemical deposits is extensively distributed in the lake region. The composition, spatial distribution and structure of the different deposits have the great different contribution rates to the occurrence of dust storms and their disasters. This paper analyzes the relations between the geomorphologic patterns, the formation of dust storms and their disaster intensity and ways as well as of floating dusts to agriculture, industry and people's health based on the field investigation, sampling analyzed results and predecessors'data.

Key words: geomorphologic pattern, dust storm, disaster, Ebinur Lake