Characteristics and risk analysis of debris flow movement in a strong earthquake area - Sichuan earthquake stricken area as an example Online publication date: Mon, 22-Mar-2021
by Xindong Ding; Xinming Cao
International Journal of Environmental Engineering (IJEE), Vol. 11, No. 1, 2021
Abstract: It is very likely that debris flow will break out in a strong earthquake area under the stimulation of a large-scale rainfall, and its risk needs to be analysed. This study analysed the debris flow in a single gully in Wenchuan, introduced the natural environment, geological conditions, and travel conditions and movement characteristics of debris flow in Wenchuan, and then analysed the risk of debris flow using two methods. It was found from the results of a risk calculation based on evaluation factors that the risk of the study area was 0.76, which was high. It was found from the results of a risk calculation based on intensity that the debris flow in the study area had XL level risk, which needed long-term control and monitoring. The research results verify the high risk of debris flow in a strong earthquake area and provide some theoretical bases for debris flow control in that area.
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