Tittel Using LiDAR and drone data in hydraulic modelling
Type Data analysis and or hydraulic modelling
Kontakt / veileder Knut Alfredsen
Sted Trondheim
The availability of LiDAR and Drone data has greatly increased the potential for hydraulic analysis in rivers and
landscapes. Detailed data makes it possible to create very detailed models for analysing both low flows and
floods. Several projects have been undertaken lately on river modelling, modelling floods in roads and modelling
effects of extreme rainfall on urban areas. There are a number of topics that still need investigations, and this is
an overview of potential tasks for master thesis related to using drone and LiDAR as input data. All can be taken
as a single task, or we can combine elements of the tasks into something you find interesting.
1. Comparison and evaluation of LiDAR and Drone point clouds. Here we will fly drones over areas where
we have LiDAR data and compare accuracy. Topics will involve the number of ground control points, use
of an RTK GPS drone, accuracy of models based on drone photogrammetry and an evaluation of potential
other uses of high precision data, e.g. for substrate size evaluation or for vegetation mapping. Image
analysis methods can also be included.
2. Hydraulic modelling based on LiDAR data. Projects related to modelling hydraulics in Årdalselva,
Lærdalselva and Gaula. Model calibration, model validation and sensitivity analysis of model parameters.
HEC-RAS has been used as a model in many previous projects and is also the preferred tool here.
3. HEC-RAS is the model of choice for the tasks we have done so far with LiDAR. In this project we will
compare simulations from HEC-RAS with other hydraulic models, e.g. Delft3D or Telemac to understand
similarities and differences in the models
4. Modelling of alterations of river geometry. Weir removal projects in Nea, replacement of Syvde weirs
with other constructions in Lærdal, artificial habitat constructions in several rivers. This is now used as a
tool in many rivers for rehabilitation and mitigation of reduced flows, and an interesting topic to study is
the stability of such constructions. This topic can also be related to sediments and shelter availability
