Anundsjö test case - Revision history

Ahar at 12:46, 26 October 2020

2020-10-26T12:46:27Z

Ahar at 12:44, 26 October 2020

2020-10-26T12:44:46Z

Bendikhansen at 14:14, 8 October 2020

2020-10-08T14:14:04Z

Bendikhansen: /* Results */

2020-10-08T14:13:19Z

Results

Bendikhansen: /* Results */

2020-10-08T14:13:06Z

Results

Bendikhansen: /* Results */

2020-10-08T14:12:27Z

Results

Ahar at 06:46, 11 May 2020

2020-05-11T06:46:12Z

Ahar at 15:04, 4 May 2020

2020-05-04T15:04:05Z

Ahar at 14:00, 4 May 2020

2020-05-04T14:00:13Z

Ahar: /* Research tasks */

2020-05-04T13:38:57Z

Research tasks

@@ Line 40: / Line 40: @@
 =Results=
-The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network have been applied to show cost-effective ways of mitigating negative impacts (SINTEF). The hydropower scheduling model SHOP has been applied to show the lost or gained income from power production with different scenarios of releasing eFlows (SINTEF). This study showed that it would be more efficient to release eFlow during 2 hours at night time instead of releasing it twice during 1 hour per week.
+The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network have been applied to show cost-effective ways of mitigating negative impacts (SINTEF). The hydropower scheduling model SHOP has been applied to show the lost or gained income from power production with different scenarios of releasing eFlows (SINTEF).
-[[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velocimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.
+[[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velocimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D. The study to include costs of lost power production showed that it would be more efficient to release eFlow during 2 hours at night time instead of releasing it twice during 1 hour per week.
 =Gallery=

@@ Line 40: / Line 40: @@
 =Results=
-The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network will all these areas (SINTEF).
+The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network have been applied to show cost-effective ways of mitigating negative impacts (SINTEF). The hydropower scheduling model SHOP has been applied to show the lost or gained income from power production with different scenarios of releasing eFlows (SINTEF). This study showed that it would be more efficient to release eFlow during 2 hours at night time instead of releasing it twice during 1 hour per week.
 [[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velocimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.

@@ Line 6: / Line 6: @@
 The Test Case is located on the small river Mo (Moälven) in the northern part of Sweden. The hydrology of the river Mo is typical for north of Sweden, with a lot of snow in the winter, a spring flood when the snow melts, low flows during the summer and often some higher flows and an autumn flood before the next winter starts with snow accumulation.
-The catchment area is 820 km<sup>2</sup>. Mean annual precipitation for the whole catchment area is approx. 727 mm per year, with a mean flow at the outlet into the Baltic Sea of 27.9 m<sup>3</sup>/s, and 10.2 m<sup>3</sup>/s at the HPP Anundsjø.
+The catchment area is 820 km<sup>2</sup>. Mean annual precipitation for the whole catchment area is approx. 727 mm per year, with a mean flow at the outlet into the Baltic Sea of 27.9 m<sup>3</sup>/s, and 10.2 m<sup>3</sup>/s at the HPP Anundsjö.
 =About the hydropower plant=
 The HPP is impounding a small reservoir, releasing the water through the turbines and a tunnel back into the river about 4km further downstream. It has an installed capacity of 5 MW. The mean annual discharge is 10 m<sup>3</sup>/s with a low flow of 2.21 m<sup>3</sup>/s.
 ===Layout===
-A small reservoir of 0.5 ha is located upstream of the HPP Anundsjø. A larger reservoir is located in a tributary about 10km further upstream, providing water releases during winter. There are important areas of spawning for salmon and trout further upstream. The bypassed river reach between the dam and the outlet of the power plant is 4 km. This bypassed river reach receives an environmental flow release.
+A small reservoir of 0.5 ha is located upstream of the HPP Anundsjö. A larger reservoir is located in a tributary about 10km further upstream, providing water releases during winter. There are important areas of spawning for salmon and trout further upstream. The bypassed river reach between the dam and the outlet of the power plant is 4 km. This bypassed river reach receives an environmental flow release.
 ===The Operator: Statkraft===
 Statkraft is a leading company in hydropower internationally and Europe’s largest generator of renewable energy. The Group produces hydropower, wind power, solar power, gas-fired power and supplies district heating. Statkraft is a global company in energy market operations. It is Norway's largest and the Nordic region's second largest power producer. [https://www.statkraft.com/ Read more.]
@@ Line 30: / Line 30: @@
 =Research objectives and tasks=
-The overall question at the HPP Anundsjø is how FIThydro can improve the situation for fish by different measures and means around the HPP. This includes the situation for the salmon smolt, which are mainly arriving at the HPP after being released in the upstream area. It also includes the situation of juvenile fish of different species as well as the possibility for salmon to pass on the way to spawn and back (influenced also by the HPP located downstream of Anundsjø and influencing especially the number of migrating fish).
+The overall question at the HPP Anundsjö is how FIThydro can improve the situation for fish by different measures and means around the HPP. This includes the situation for the salmon smolt, which are mainly arriving at the HPP after being released in the upstream area. It also includes the situation of juvenile fish of different species as well as the possibility for salmon to pass on the way to spawn and back (influenced also by the HPP located downstream of Anundsjö and influencing especially the number of migrating fish).
 ===Research tasks===
 The research tasks and field studies conducted at Anundsjö are:

@@ Line 42: / Line 42: @@
 The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network will all these areas (SINTEF).
-[[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velcimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.
+[[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velocimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.
 =Gallery=

@@ Line 42: / Line 42: @@
 The work focused on the reservoir (CNRS, SWECO, NTNU), the bypassed river reach with the fishway (NTNU) and the junction of the hydropower plant tunnel outlet and the river (TUM, SWECO, NTNU).  A telemetry study with smolt covered even a larger area including a stretch of the river upstream the reservoir and the downstream area until the bay of Örnsköldsvik (INBO). Scenario modelling applying different mitigation measures in a Bayesian network will all these areas (SINTEF).
-[[Acoustic Doppler Current Profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler Velcimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.
+[[Acoustic Doppler current profiler (ADCP)|ADCP]] was used to map the bathymetry of the reservoir, serving as input for hydrodynamic modelling. Combined with telemetry study of smolts, it is clear that the current configuration of a floating debris collector and a guidance device actually prevents smolts from finding a safe downstream migration pathway. The telemetry study shows that only 1 smolt managed to find a safe way for downstream migration when released in the bypass section just below the dam. The one-hour release of water to the bypassed reach of river twice a week, do not reach the confluence of the hydropower plant outlet and the river within an hour, and the attraction effect is not very clear. Water velocities seem to be too low to allow migration into bypassed reach without additional release of water. Detailed measurements of water velocities by [[Acoustic Doppler velcimetry (ADV)|ADV]], and the use of drones and the [[Structure from motion (SfM)|Structure-from-motion-method]] to create bathymetry was used to validate the new [[Double Averaging method|double-averaging method]] of hydrodynamic modelling in 3D.
 =Gallery=

@@ Line 34: / Line 34: @@
 The research tasks and field studies conducted at Anundsjö are:
-* Hydrodynamic conditions in reservoir and their impact on downstream smolt migration
+* Hydrodynamic conditions in the reservoir and their impact on downstream smolt migration
 * Physical conditions in the nature-like fishway and its functionality for upstream migration of salmon
-* Access to the bypassed river reach for upstream migration
+* Access and attraction to the bypassed river reach for upstream migration
 * Use of advanced methods for mapping of bathymetry, measurements of water velocity and modelling
 =Results=
 =Gallery=