Joost Pol

Joost Pol
Delft University of Technology | TU · Department of Hydraulic Engineering

About

17
Publications
2,617
Reads
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30
Citations
Citations since 2017
15 Research Items
29 Citations
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Introduction
Skills and Expertise

Publications

Publications (17)
Thesis
Full-text available
Structural flood protection systems such as levees are an important component in flood risk reduction strategies. Levees can fail through various failure mechanisms; this thesis focuses on the mechanism Backward Erosion Piping (BEP) which occurs when a sandy levee foundation is eroded by groundwater flow. To assess whether a levee's reliability com...
Article
Full-text available
Structural reliability analysis often considers failure mechanisms as correlated but non-interacting processes. Interacting failure mechanisms affect each others performance, and thereby the system reliability. We describe such interactions in the context of flood defenses, and analyze under which conditions such interactions have a large impact on...
Article
This paper presents the numerical interpretation of a recent experiment on a real-scale levee physical model, in order to investigate the process of Backward Erosion Piping (BEP) and validate a recently proposed finite element formulation able to model both the simultaneous processes observed in backward erosion piping, i.e. the propagation of the...
Conference Paper
Full-text available
Assessments of backward erosion piping in dams and levees generally assume an undisturbed soil; i.e. initially there is no pipe present. However, field observations show that sand boils occur more often than failures, so there will likely be small pipes or voids present after a flood. Over time, this can lead to cumulative damage and a decreasing s...
Article
Full-text available
Backward erosion piping (BEP) is a form of internal erosion which can lead to failure of levees and dams. Most research focused on the critical head difference at which piping failure occurs. Two aspects have received less attention, namely (1) the temporal evolution of piping and (2) the local hydraulic conditions in the pipe and at the pipe tip....
Article
Backward erosion piping (BEP) is a type of internal erosion responsible for the failure of many dams and levees. BEP occurs when small, shallow erosion channels progress upstream through foundation sands beneath the structure. As analysis of BEP involves coupling two different sets of flow equations to describe the groundwater flow and erosion pipe...
Conference Paper
Full-text available
Most research on backward erosion piping (BEP) focuses on the critical conditions leading to failure. This paper studies the development of piping over time once the critical conditions are exceeded, which is useful to estimate time to failure. A commonly used small scale rectangular box setup is modified in order to monitor pore pressures and pipe...
Article
Full-text available
Het Shields-Darcy-pipingmodel is een welkome kritische blik op de rekenregels. Het Expertisenetwerk Waterveiligheid (ENW) heeft echter niet positief geadviseerd over toepassing bij dijkversterkingen. Er is evenwel nog meer experimenteel en modelmatig onderzoek nodig om bestaande en nieuwe modellen aan te scherpen.
Conference Paper
Full-text available
Flood retention basins are widely applied to improve flood safety. The effectiveness of such basins is more sensitive for (hydrologic) uncertainties compared to other flood protection measures. This paper shows how uncertainty can be included in the effectiveness of two major types of flood retention: with fixed sills and adjustable gates. Fixed si...
Chapter
Tijdens de hevige neerslag in België, Duitsland en Nederland is het regenwater snel naar de regionale rivieren en de Maas gestroomd, waarna deze rivieren buiten hun oevers traden. Dit hoofdstuk beschrijft de hydrodynamische feiten (afvoeren, waterstanden, overstroomd gebied), plaatst dit in perspectief door vergelijking met onder meer eerdere hoogw...
Article
Full-text available
This paper presents a large scale backward erosion piping experiment aimed at studying the erosion rate. This temporal aspect of piping complements previous research, which focused on the critical head. To study the progression rate in realistic conditions, an experiment was carried out on a 1.8 m high levee with a cohesive blanket on a sandy found...
Technical Report
Full-text available
Describes the application for the Rhine branches in the Netherlands of a method to calculate the cost for reinforcements of dikes taking into account the effects of river widening
Technical Report
Full-text available
Describes the application for the Meuse in the Nedtherlands of a method to calculate the costs for dike reinforcements taking into account the effects of river widening.
Technical Report
Full-text available
Describes a method to calculate the cost for reinforcements of dikes taking into account the effects of river widening.
Conference Paper
Full-text available
Design water levels are needed for the design of flood defences along the Dutch river Meuse. Current practise is that these water levels are determined by hydrodynamic simulation of a standard design hydrograph at the upstream gauging station Borgharen. The peak discharge of this synthetic hydrograph is based on a frequency analysis of the 100-year...

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Projects

Project (1)
Project
Research into different aspects (i.e. reliability, engineering, governance, law, ecology) of the new risk-based safety standards for flood protection in the Netherlands. Goal is to support the Dutch Flood Protection Program with applied research that can improve the efficiency and quality of the ~1600 kilometers of dike reinforcement in the coming decades.