Author(s): Hakon Sundt; Knut Alfredsen

Linked Author(s): Knut Alfredsen

Keywords: No Keywords

Abstract: Although physical data collection in river systems now have a range of high-precision methodologies, different methods may induce different results when used as a basis for hydraulic modelling. Airborne LIDARs is used to obtain spatially large terrain datasets in or out of the water with equal or higher precision and accuracy than more traditional techniques like GPS and ADCP. UAVs with high-resolution aerial photography can cover large parts of rivers in a short amount of time, increasing the efficiency of field work sessions. These methods can potentially provide stakeholders, hydropower producers and decision makers with improved ways to assess and mitigate hydromorphological deterioration in regulated rivers. We assess the vertical accuracy in four different topographical dataset in a regulated river in mid-Norway and examine the potential errors and differences in the datasets as a basis for hydraulic modelling. We also examine the potential for extracting the wet/dry land interface from these dataset.

DOI:

Year: 2018