The distribution of formation lithology and its control on geological disasters in the Bailong River basin of southern Gansu Province, China

[摘要] Formation Lithology is one of the key parameters that determine sediment yield, and geology structure, thus its importance has grown in studying the magnitude and frequency of debris flows and landslide disaster. In this paper, we analyze the distribution of Formation Lithology and its relationship with the geology disaster in the Bailong River Basin in China's Gansu Province. The soft rock strata exposed in Bailong River Basin, like limestone, phyllite, slate, shale and Quaternary loess, are more susceptible to geological effects, because they are weak and broken, and with poor erosion resistance. Landslides and collapses are easily formed under the endogenetic and exogenic forces to the mountain, which provide abundant material conditions for the development of debris flow. It indicates that the long-timely exposed strata distributes more wildly in this area, which, with large rate of weathering and poor erosion resistance, is easily influenced by external conditions and sudden factors, thus providing favorable conditions for the occurrence of debris flow. Therefore, it is also a high risk area for debris flow.

[发布机构] Faculty of Land Resources Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, 121 Street, Kunming; 650093, China^1;College of Earth and Environmental Science, Lanzhou University, 222 South Tianshui Road, Lanzhou; 730000, China^2

[效力级别] 经济学

[关键词] Abundant materials;Erosion resistance;External conditions;Favorable conditions;Geological disaster;Geology disaster;Geology structures;Sediment yields