University of Twente Student Theses


The effects of pinch culverts on the Glanerbeek water system through the use of a combined surface-ground water model

Bonilla Coba, E.J. (2021) The effects of pinch culverts on the Glanerbeek water system through the use of a combined surface-ground water model.

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Abstract:Dry periods and flooding have been exacerbated in recent years by rising temperatures and precipitation, which is predicted to continue. Droughts are particularly severe in Twente due to the soil’s sand layers and the narrowness of aquifers, which means that only a little amount of water can be retained in the soil. Additionally, Twente’s elevation relative to the rest of the Netherlands results in rapid evaporation of any extra water (Hasselerharm, M, 2020). Municipalities and other entities responsible for water management have investigated solutions. Vechtstromen serving as one of Twente’s water management agencies conducted research on Twente’s most effective and impactful water retention techniques. From this, it was determined that pinch culverts had the most potential for water retention improvement. The purpose of this research is to ascertain the influence of pinch culverts on Glanerbeek discharge while also taking into account the dynamics of groundwater and surface water. Gabriëls’ Sobek (2021) surface model was used to calculate the surface dynamics. For groundwater modelling, the MIPWA model, which is based on MODFLOW, was chosen. Both models were coupled together, and the results examined. The results of this study demonstrated how merging a surface water and groundwater model can provide further insight into a water system’s operation and responsiveness to interventions. For instance, it shows how pinch culverts contribute to groundwater recharge by increasing infiltration and consequently water retention. Over 10 years, the culverts with a 25% of its original diameter increase the volume of water entering the groundwater system by over 1 million cubic meters. Finally, a unified model provided a better understanding of the interplay between the surface and subsurface water systems, both in their current state and with the implementation of further measures.
Item Type:Essay (Bachelor)
Faculty:ET: Engineering Technology
Programme:Civil Engineering BSc (56952)
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