University of Twente Student Theses
Development of a Pulsing Water System for the Fire Hose Method : a method of categorising erosion resistance of grass and clay
Metselaar, M.J. (2021) Development of a Pulsing Water System for the Fire Hose Method : a method of categorising erosion resistance of grass and clay.
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| Abstract: | The Netherlands faces a colossal task to ensure all 3700 km of Dutch primary flood defences meet updated safety standards by 2050. New safety standards introduced in 2017 are now based on a combined failure probability of all defence failure mechanisms. One of the main failure mechanisms is wave overtopping. The extent of erosion due to wave overtopping is predominantly determined by the defence’s grass cover erosion resistance. Current methods to determine grass cover erosion resistance are either large scale and expensive or small scale and fail to accurately consider the large scale properties of grass coverings. Deltares have developed the fire hose method, which aims to address the current technological shortfall by being able to classify grass cover erosion at low costs whilst considering large scale properties of grass covers. The method involves subjecting a grass cover section to continuous jet stream and assessing the damage caused after a certain period of time. Currently the jet stream is continuous however a pulsing stream is desired to better mimic the intermittent nature of overtopping waves. |
| Item Type: | Essay (Bachelor) |
| Faculty: | ET: Engineering Technology |
| Programme: | Civil Engineering BSc (56952) |
| Link to this item: | https://purl.utwente.nl/essays/87657 |
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