Use of incipient motion data for backward erosion piping models
| Autor: | Leo C. van Rijn, Gijs Hoffmans, Vera van Beek, Bryant A. Robbins, Adam Bezuijen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
geography
Piping geography.geographical_feature_category Technology and Engineering Water flow Hydraulics Stratigraphy Flow (psychology) 0207 environmental engineering Geology Laminar flow 02 engineering and technology Inflow 010501 environmental sciences 01 natural sciences law.invention law Erosion Geotechnical engineering 020701 environmental engineering Levee 0105 earth and related environmental sciences |
| Zdroj: | INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH |
| ISSN: | 1001-6279 |
| Popis: | Backward erosion piping involves the gradual removal of granular material under the action of water flow from the foundation of a dam or levee, whereby shallow pipes are formed that grow in the direction opposite to the flow. This pipe-forming process can ultimately lead to failure of a water-retaining structure and is considered one of the most important failure mechanisms for dikes and levees in the Netherlands and the United States. Modeling of this mechanism requires the assessment of hydraulic conditions in the pipe, which are controlled by the particle equilibrium at the pipe wall. Since the pipe׳s dimensions are controlled by the inflow to the pipe from the porous medium, the flow through the pipe is thought to be laminar for fine- to medium-grained sands. The literature provides data for incipient motion in laminar flow, which is reviewed here and complemented with data from backward erosion experiments. The experiments illustrate the applicability of the laminar incipient motion data to determine the erosion pipe dimensions and corresponding pipe hydraulics for fine- to medium-grained sands, for the purpose of backward erosion piping modeling. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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