Tittel Evaluation of the River1D ice model
Type Hydraulic modelling
Kontakt / veileder Knut Alfredsen
Sted Trondheim
River ice is common in all cold climate countries in winter and can lead to both environmental and engineering issues. Ice on water intakes, ice induced floods, frazil and anchor ice and ice breakup are all processes that are
annual occurrences, but still there is a lack of knowledge of these processes in Norwegian rivers and particularly related to quantification. Some numerical ice models exist, but most of them are developed for larger Canadian or
American rivers and not particularly suited for smaller and steeper Norwegian rivers. The commercial MIKE-ICE model has been used with some success, but is complicated and costly. Recently, the River1D model has been
upgraded with more ice processes and seems to be an interesting option. The purpose of this task is to test this model.
1. Set up and run the River1D model for Orkla from Grana power plant to the Bjørset intake. Calibrate the model on observed flow and water level data. Calibrate water temperature against observations.
2. Compare results from the ice simulation in the model setup in 1) with data collected previously for this reach and presented in Timalsina et al. 2013. This will also involve a comparison with results from MIKE- 11 which was used in the previous study.
3. Compare model results against Sentinel 2 satellite pictures to assess spatial ice coverage from the model against observed data
4. Test model parameter sensitivity and describe which parameters are most important in the model calibration. Test the models ability to quantify ice production both spatially and temporally over the
winter season.
5. Write the thesis as a scientific paper and present the results at the IAHR ice conference in Trondheim in June 2020.
