Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Predicting Rock Scour in an Alluvial River with a One-Dimensional Model
Taiwan rivers generally have steep slopes, are subject to high flows, have frequent earthquake activity, and have relatively weak bedrock. Bedrock is often exposed and rock scour is an important river process. For example, the river channel downstream of the Shih-Gang on the Tachia River experienced severe rock scour since the Chi-Chi earthquake of 1999 uplifted a portion of the river approximately 10 m. The occurrence of deep rock scour has been a major threat to river infrastructure at many other locations in Taiwan. In this study, a rock scour model is implemented into a one-dimensional (1D) hydraulic and sediment transport model. The rock scour model has components to predict the potential scour due to direct flow hydraulic forces and scour due to sediment abrasion. The resultant 1D model is capable of simulating the combined effects of rock erosion and alluvial river erosion and deposition. The new model is applied to the Tachia River in the reach affected by the Chi-Chi earthquake in 1999. Findings related to the applicability and limitations of the current rock scour models are reported.
Predicting Rock Scour in an Alluvial River with a One-Dimensional Model
Taiwan rivers generally have steep slopes, are subject to high flows, have frequent earthquake activity, and have relatively weak bedrock. Bedrock is often exposed and rock scour is an important river process. For example, the river channel downstream of the Shih-Gang on the Tachia River experienced severe rock scour since the Chi-Chi earthquake of 1999 uplifted a portion of the river approximately 10 m. The occurrence of deep rock scour has been a major threat to river infrastructure at many other locations in Taiwan. In this study, a rock scour model is implemented into a one-dimensional (1D) hydraulic and sediment transport model. The rock scour model has components to predict the potential scour due to direct flow hydraulic forces and scour due to sediment abrasion. The resultant 1D model is capable of simulating the combined effects of rock erosion and alluvial river erosion and deposition. The new model is applied to the Tachia River in the reach affected by the Chi-Chi earthquake in 1999. Findings related to the applicability and limitations of the current rock scour models are reported.
Predicting Rock Scour in an Alluvial River with a One-Dimensional Model
Greimann, Blair P. (Autor:in) / Lai, Yong G. (Autor:in) / Wu, Kuowei (Autor:in)
World Environmental and Water Resources Congress 2009 ; 2009 ; Kansas City, Missouri, United States
12.05.2009
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Environmental issues , Hydrology , Ecosystems , Wetlands , Drainage , Water treatment , Water management , Water supply , Rivers and streams , Stormwater management , Hydrodynamics , Irrigation , Wastewater management , Sediment , Water distribution systems , Predictions , Groundwater management , Water resources , Water rights , Land use , Taiwan , Drinking water , Watersheds , Rocks , Scour , Hydraulic structures , Water quality
Predicting Rock Scour in an Alluvial River with a Two-Dimensional Model
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Predicting Rock Scour in an Alluvial River with a One-Dimensional Model
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Quasi-Two-Dimensional Simulation of Scour and Deposition in Alluvial Channels
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