Wind erosion at the dry-up bottom of Aiby Lake

Clay-rich deposits are usually considered as hard materials to be eroded by wind. Data from both surface monitoring and field survey at the dry-up bottom of Aiby Lake present that clay-rich lacustrine deposits are easily broken down and eroded away by wind in the seasonal alternation process under the natural arid environment, and are the significant source of air dust. The surface of the clay-rich deposits is broken and softened by the freezing-and-thawing action in winter season and/or by salt and alkali action with precipitation. Impact of wind-input particles and plow of plant branches with wind force drive the clay-rich sediments moving. Wind picks up the clay pebbles and repeats the impaction further-ward onto the dry-up surface. Tremendous fine materials, including soft salts, are contributed to air dust, and transported in long distance.

     

艾比湖干涸湖底尘暴及其灾害分析

在艾比湖地区水动力，风力和重力作用形成的洪积、冲积、湖积、风积、化学沉积等第四纪的沉积类型分布十分广泛，不同沉积类型的物质组成、空间分布、结构特征及其对尘暴物质的贡献率和沙尘暴产生的灾害程度有较大的不同。本文根据实地考察，取样分析的结果以及前人的资料，对艾比湖地区地貌结构特征与沙尘暴形成的关系以及沙尘暴和浮尘天气对大农业、工人、人民健康造成的灾害强度、灾害方式进行分析研究。