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ZHANG Haowei, LIU Fuzhen, WANG Junchao, ZHANG Jiajia. 2022. Hazard assessment of debris flows in Kongpo Gyamda, Tibet based on FLO-2D numerical simulation. Journal of Geomechanics, 28(2): 306-318. doi: 10.12090/j.issn.1006-6616.2021117
Citation: ZHANG Haowei, LIU Fuzhen, WANG Junchao, ZHANG Jiajia. 2022. Hazard assessment of debris flows in Kongpo Gyamda, Tibet based on FLO-2D numerical simulation. Journal of Geomechanics, 28(2): 306-318. doi: 10.12090/j.issn.1006-6616.2021117
shu

Hazard assessment of debris flows in Kongpo Gyamda, Tibet based on FLO-2D numerical simulation

  • 1.

    School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, Sichuan, China

  • 2.

    Geological Hazard Prevention and Control Technology Center, China Geological Survey, Chengdu 611734, Sichuan, China

    • Fund Project: This research is financially supported by the Geological Survey Projects of the China Survey Survey (Grants No.20190644, 20190505, 20160279) and the Second Tibetan Plateau Scientific Expedition and Research (Grant No.2019QZKK0902)
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Received Date:  04 September 2021
Revised Date:  13 January 2022
Publish Date:  28 April 2022
    Abstract

  • Kongpo Gyamda is located in eastern Tibet, where debris flows occur frequently in the rainy season, which has a serious impact on local people's daily life and hinders regional economic construction and development. In order to study the hazard characteristics of small to medium-sized debris flow in eastern Tibet and potential dangers to urban residential areas, the FLO-2D software was used to study five debris flow gullies with relatively concentrated residents around Kongpo Gyamda. The scouring and silting characteristics of debris flows were simulated. Based on the simulation results in terms of depth and velocity, the intensity and hazard zoning of debris flows were determined. By analyzing the topological relationship between the debris flow danger zone and the residential area, the debris flow risk around the county was evaluated. It provides technical reference for the town planning, and disaster prevention and mitigation in Kongpo Gyamda.

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