Debris flow hazard assessment by combining numerical simulation and land utilization

Wang, Jun; Ou, Guoqiang; Gong, Quanmei; Yuan, Shaoxiong

doi:10.1007/s10064-017-1006-7

Cited by 17 publications

(4 citation statements)

References 38 publications

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“…Ref. [21] determined the hazard in Du Jiangyan City, China, by combining land uses and depths reached by debris flows during events corresponding to return periods of 5, 10, 20, 20, 50, and 100 years. This methodology considers three land uses (construction, transportation, and forest) and four different depths (greater than 4 m, between 2 and 4 m, between 1 and 2 m, and less than 1 m), resulting in twelve combinations from which the hazard classification is made in three categories: high, moderate, and low.…”

Section: Introductionmentioning

confidence: 99%

Determination of Hazard Due to Debris Flows

Bocanegra,

Ramírez,

Salcedo

et al. 2023

Water

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Debris flows have generated major disasters worldwide due to their great destructive capacity, which is associated with their high energy levels and short response times. To achieve adequate risk management of these events, it is necessary to define as accurately as possible the different hazard levels to which the territory is exposed. This article develops a new methodology to estimate this hazard based on the hydrodynamic characteristics of the flow and the granulometry of the sediments that can be mobilized by the flow. The hydrodynamic characteristics of the flow are determined via mathematical modeling that considers the rheology of non-Newtonian flows and the different volumes of sediments that could be transported during events corresponding to different return periods. The proposed methodology was implemented in the Jamundí River basin (Colombia). The results obtained indicate that in the upper part of this basin, there is a low hazard level, while in the lower part of the basin, approximately 15% of the affected territory has a medium hazard level, and the remaining 85% has a low hazard level. The methodology developed is simple to implement but technically rigorous since it considers all relevant aspects in the generation of debris flows.

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Section: Introductionmentioning

confidence: 99%

Determination of Hazard Due to Debris Flows

Bocanegra,

Ramírez,

Salcedo

et al. 2023

Water

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“…With field investigation and information queries, we found that local residents are usually undertaking agriculture, village, and road construction in those areas. In recent years, domestic and international scholars focused research related to debris flow deposits, which include the depositional characteristics, land-use classification and sedimentation processes, and the debris flow hazard zoning method (Ibe and Ebe, 2000;Liu et al, 2001;Okunishi and Suwa, 2001;Xu et al, 2001;Wang et al, 2018). Meanwhile, the debris flow disaster deposit area is the combination of a resource and disaster as its development has both positive and negative effects.…”

Section: Introductionmentioning

confidence: 99%

Land-use evaluation and utilization advice research on debris flow disaster deposit area

et al. 2022

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The upstream Fujiang River are famous for their high mountains and narrow canyons, which results in a conflict of interest between local residents and land use. To make good use of precious land resources is a meaningful work for local people and government. Therefore, field surveys and theoretical analysis were carried out in the upstream Fujiang River to explore the land-use evaluation and utilization advice. Firstly, we analyzed the factors which affect the land use of debris flow depositional area. Secondly, we chose the factors of soil fertility quality, soil particle conservation, and the geological engineering condition to set up the land-use evaluation method. Thirdly, through index classification, we give the planting type, land-use type, construction type respectively, according to grading and assignment value for each factor, we built the debris flow disaster-prone land utilization mode R by using an analytical hierarchy process method. Lastly, taking Huangjiaba village as an example, based on the debris flow disaster land-use evaluation method and debris flow hazard evaluation, we identified four land-use scenarios. The results show that the value of the four scenarios is between 1.00 and 4.00, the four scenarios utilization advices are given based on each R-value and Huangjiaba natural condition. It also obtained that the developmental tendencies of the debris flow disaster areas appear to deposit recently, the frequency of debris-flow activity is evolving from high to stable, on making good use of debris flow deposit fan’s usage is necessary to explore the disaster prone land and avoid disaster loss. Further studies need to systematically consider more factors to evaluate debris flow and disaster-prone land utilization, which can provide a reference for the rural space planning and revitalization for the local government.

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“…Rainfall-induced debris flow is a mixture of unconsolidated sediment and is one of the most important of all natural hazards, occurring in many areas [1]. Debris flows cause severe damage to both life and property every year worldwide, occurring at different intervals and with varying durations [2].…”

Section: Introductionmentioning

confidence: 99%

The Application of a Three-Dimensional Deterministic Model in the Study of Debris Flow Prediction Based on the Rainfall-Unstable Soil Coupling Mechanism

Qiao¹,

Qin²,

Chen³

et al. 2019

Processes

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As debris flow is one of the most destructive natural disasters in many parts of the world, the assessment and management of future debris flows with proper forecasting methods are crucial for the safety of life and property. So increasing attention has been paid to the forecasting methods on debris flows. A debris flow forecasting method based on the rainfall-unstable soil coupling mechanism (R-USCM) is presented in the current study. This method is based on the debris flow formation mechanism. The density of sediment is introduced as an evaluation index to determine the susceptibility of debris flow occurrence. The forecasting method includes two phases: (1) rainfall and soil coupling and (2) runoff and unstable soil coupling. Scoops3D, a three-dimensional (3D) model for analyzing slope stability, was introduced into the debris flow forecasting method. In order to test the forecasting accuracy of this method, Jiaohe County was selected as a research area, and the serious debris flow disasters attributed to strong rainfall on 20 July 2017 were taken as the research case. By comparing the forecasting results with the debris flow distribution map for Jiaohe County, the method based on the R-USCM is feasible for forecasting debris flows at the regional scale. The application of the Scoops3D model can more reasonably analyze the slope stability than the traditional two dimensional (2D) method and improve the forecasting ability of debris flows.

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Debris flow hazard assessment by combining numerical simulation and land utilization

Cited by 17 publications

References 38 publications

Determination of Hazard Due to Debris Flows

Determination of Hazard Due to Debris Flows

Land-use evaluation and utilization advice research on debris flow disaster deposit area

The Application of a Three-Dimensional Deterministic Model in the Study of Debris Flow Prediction Based on the Rainfall-Unstable Soil Coupling Mechanism

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