EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes
Debris flow material properties change during the initiation, transportation and deposition processes, which influences the runout characteristics of the debris flow. A quasi-three-dimensional depth-integrated numerical model, EDDA (Erosion–Deposition Debris flow Analysis), is presented in this pape...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-03-01
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| Series: | Geoscientific Model Development |
| Online Access: | http://www.geosci-model-dev.net/8/829/2015/gmd-8-829-2015.pdf |
| _version_ | 1811199725675741184 |
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| author | H. X. Chen L. M. Zhang |
| author_facet | H. X. Chen L. M. Zhang |
| author_sort | H. X. Chen |
| collection | DOAJ |
| description | Debris flow material properties change during the initiation, transportation
and deposition processes, which influences the runout characteristics of the
debris flow. A quasi-three-dimensional depth-integrated numerical model,
EDDA (Erosion–Deposition Debris flow
Analysis), is presented in this paper to simulate debris flow erosion, deposition
and induced material property changes. The model considers changes in debris
flow density, yield stress and dynamic viscosity during the flow process.
The yield stress of the debris flow mixture determined at limit equilibrium
using the Mohr–Coulomb equation is applicable to clear water flow,
hyper-concentrated flow and fully developed debris flow. To assure numerical
stability and computational efficiency at the same time, an adaptive time
stepping algorithm is developed to solve the governing differential
equations. Four numerical tests are conducted to validate the model. The
first two tests involve a one-dimensional debris flow with constant
properties and a two-dimensional dam-break water flow. The last two tests
involve erosion and deposition, and the movement of multi-directional debris
flows. The changes in debris flow mass and properties due to either erosion
or deposition are shown to affect the runout characteristics significantly.
The model is also applied to simulate a large-scale debris flow in
Xiaojiagou Ravine to test the performance of the model in catchment-scale
simulations. The results suggest that the model estimates well the volume,
inundated area, and runout distance of the debris flow. The model is
intended for use as a module in a real-time debris flow warning system. |
| first_indexed | 2024-04-12T01:53:14Z |
| format | Article |
| id | doaj.art-f38a8920f96b4d8580a9557f8744efdf |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-12T01:53:14Z |
| publishDate | 2015-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-f38a8920f96b4d8580a9557f8744efdf2022-12-22T03:52:53ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032015-03-018382984410.5194/gmd-8-829-2015EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changesH. X. Chen0L. M. Zhang1Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, ChinaDebris flow material properties change during the initiation, transportation and deposition processes, which influences the runout characteristics of the debris flow. A quasi-three-dimensional depth-integrated numerical model, EDDA (Erosion–Deposition Debris flow Analysis), is presented in this paper to simulate debris flow erosion, deposition and induced material property changes. The model considers changes in debris flow density, yield stress and dynamic viscosity during the flow process. The yield stress of the debris flow mixture determined at limit equilibrium using the Mohr–Coulomb equation is applicable to clear water flow, hyper-concentrated flow and fully developed debris flow. To assure numerical stability and computational efficiency at the same time, an adaptive time stepping algorithm is developed to solve the governing differential equations. Four numerical tests are conducted to validate the model. The first two tests involve a one-dimensional debris flow with constant properties and a two-dimensional dam-break water flow. The last two tests involve erosion and deposition, and the movement of multi-directional debris flows. The changes in debris flow mass and properties due to either erosion or deposition are shown to affect the runout characteristics significantly. The model is also applied to simulate a large-scale debris flow in Xiaojiagou Ravine to test the performance of the model in catchment-scale simulations. The results suggest that the model estimates well the volume, inundated area, and runout distance of the debris flow. The model is intended for use as a module in a real-time debris flow warning system.http://www.geosci-model-dev.net/8/829/2015/gmd-8-829-2015.pdf |
| spellingShingle | H. X. Chen L. M. Zhang EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes Geoscientific Model Development |
| title | EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes |
| title_full | EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes |
| title_fullStr | EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes |
| title_full_unstemmed | EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes |
| title_short | EDDA 1.0: integrated simulation of debris flow erosion, deposition and property changes |
| title_sort | edda 1 0 integrated simulation of debris flow erosion deposition and property changes |
| url | http://www.geosci-model-dev.net/8/829/2015/gmd-8-829-2015.pdf |
| work_keys_str_mv | AT hxchen edda10integratedsimulationofdebrisflowerosiondepositionandpropertychanges AT lmzhang edda10integratedsimulationofdebrisflowerosiondepositionandpropertychanges |