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Department of Civil
and Environmental
Engineering
Spring 2017
Hydraulic Modelling of
Hydro Power Operation
in Tokkeåi
Supervisor:
Knut Alfredsen
Co-supervisor:
Morten Stickler
In cooperation with:
Statkraft
Lars Skeie
MASTER THESIS
Background
A two-dimensional hydraulic model is to be
created for the purpose of studying the effects
of different operation regimes of the hydro
power station in Tokkeåi. The model used
is HEC-RAS 5.0 which has the capability to
simulate the shallow-water equation (2D).
The terrain is created from LIDAR-data, which
was measured/collected by AHM, and self-
measured data from field surveys. The model
will be calibrated against measured water
surface elevations (WSEL) from field surveys
for different discharges, where the Manning’s
number will be used to fit the simulated and
measured WSELs.
After the model is calibrated it will be used to
look at the different effects with regards to both
static and dynamic hydro power operations.
The methods from EnviPEAK’s “Miljøvirkninger
av effektkjøring” will be applied as a part of
the study. The results will then be related to
biological data previously collected for the river,
with focus on dry areas and fish habitat.