University of Twente Student Theses


A comparison between the Tygron Geodesign Platform and Deft3D : a case study

Kampman, W.T. (2019) A comparison between the Tygron Geodesign Platform and Deft3D : a case study.

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Abstract:This research shows a comparison between the results of a flood propagation model in the Tygron Geodesign Platform (from here on called Tygron) and in Delft3D. Tygron is multifunctional software that is designed to make quick but well informed decisions. It is relatively new software and it has not yet been properly validated. To give an overview of the performance of Tygron, a comparison is done with Delft3D. Delft3D is more established software and has been tested and validated extensively. The comparison between Tygron and Delft3D is done according to a case study. This provides a realistic as well as a comparable situation. The case area is a peak storage area in the south-western point of Haarlemmermeer. The inflow discharge is controlled during the whole simulation and the water flows through ditches in the area and later flood the plains. The simulations are compared on flow velocity, water depth and water direction. The model in Tygron was available from the start. The model in Delft3D was set up specifically for this research. The research results show a number of differences between Tygron and Delft3D. The water depth in the area shows the expected behaviour for both Tygron and Delft3D. The differences between Tygron and Delft3D are minimal and not significant for the vast majority of model purposes. Considering flow velocity, there are two anomalies. The expectation for the flow velocity pattern is that the highest velocity occurs in the middle of a channel. This is the location where the effect of surface friction is at its minimum. However, Tygron does not show this pattern, but rather a slightly deviating pattern. Delft3D does show the expected flow velocity pattern. The second anomaly in flow velocity is the occurrence of flow velocity peaks at the edge of the channels. These flow velocity peaks only seem to occur at the cell between a wet and a dry area and do not significantly affect the flow around it. Delft3D does not show these flow velocity peaks. The comparison of the flow direction shows a last anomaly in the results from Tygron. From the beginning of the simulation, the flow direction seems to alternate on an irregular distance. This suggests that the water is already moving. This leads to believe that there is something wrong with the initial state of the simulation in Tygron. This phenomenon is also not shown by Delft3D. Considering that the development of Tygron is young, and considering the other applications Tygron can be used for, it shows great potential as modelling software. The water module can already be used for predictions of water depths in relatively simple environments. For local and detailed predictions of flow velocity and direction however, the software still needs improvement before it can be used effectively.
Item Type:Essay (Bachelor)
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering BSc (56952)
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