Volume 28 Issue 2
Apr.  2022
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ZHANG Haowei, LIU Fuzhen, WANG Junchao, et al., 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, et al., 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

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

doi: 10.12090/j.issn.1006-6616.2021117
Funds:

the Geological Survey Projects of the China Survey Survey 20190644

the Geological Survey Projects of the China Survey Survey 20190505

the Geological Survey Projects of the China Survey Survey 20160279

the Second Tibetan Plateau Scientific Expedition and Research 2019QZKK0902

More Information
  • Received: 2021-09-04
  • Revised: 2022-01-13
  • 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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