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[[file:fithydrologo_large.png|thumb|300px]][[file:Flag_of_Europe.png|thumb|300px]]     
 
[[file:fithydrologo_large.png|thumb|300px]][[file:Flag_of_Europe.png|thumb|300px]]     
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=Hydropower and fish: challenges=
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Hydropower is a very site-specific technology developed where the topography and hydrology are favourable. All hydropower plants require construction of a dam or weir, generally obstructing fish movements. Habitat are altered by imposed changes in flow and/or sediment transport and the set of impacts can be inter-related. The magnitude of the changes in flow is to a large degree determined by the size of the reservoir, making it possible to store water from period of abundant resources to periods of lower inflow. Biology and composition of the fish population is, however, unique to each site. As such, the environmental problems and the related measures are also very specific to each location, posing challenges to presenting generic measures viable to all possible sites, and often the solution will be a combination of measures.
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In general, hydropower [[:category:types of problems|impacts]] on fish can be described as:
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#direct impacts
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#impacts on movements
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#impacts on habitat
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The direct impacts could be mortality or injury caused by turbine passage or flushing of sediments, while building a dam will introduce challenges with respect to upstream and downstream migration (impacts on movements). Changes in the natural flow and sediment regime will change the habitat condition, both in the short and long-time horizon.
  
 
=Decision Support System (DSS)=
 
=Decision Support System (DSS)=
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=What is the FIThydro wiki and how do I use it?=
 
=What is the FIThydro wiki and how do I use it?=
This wiki was created to help users implement the appropriate [[:category:measures|mitigation measures]] for environmental problems caused by hydropower production. The mitigation measures are classified according to various [[Classification table|parameters]], such as appropriate climatic regions, which species they are aimed at, which physical condition they address, etc. Each measure has a suggested procedure with recommended [[Methods,_tools,_and_devices|methods, tools, and devices]] for different stages of the implementation.
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This wiki was created to help users implement the appropriate [[:category:measures|solutions/mitigation measures]] for environmental problems caused by hydropower production. The mitigation measures are classified according to various [[Classification table|parameters]], such as appropriate climatic regions, which species they are aimed at, which physical condition they address, etc. Each measure has a suggested procedure with recommended [[Methods,_tools,_and_devices|methods, tools, and devices]] for different stages of the implementation.
 
 
[[file:flowchart_wiki.png|500px|center]]
 
 
 
<!--The first step in this process is to identify what the problems actually are, and what they are caused by. These issues should be chosen from [[:category:classification tables|classification parameter values]] that have been consistently applied for each type of mitigation measure; for example, if there are issues with salmon spawning rates due to a lack of suitable substrate, choose the values "Salmon", "spawning", "substrate". Once the issues are determined, the user can search for the mitigation measure(s) that are appropriate for the given situation following the [[search instructions]].
 
  
After identifying the appropriate mitigation measures, the user can learn more about them and how to implement them using the [[Methods, tools, and devices|methods, tools, and devices]] (MTDs) instructions on the [[:category:measures|mitigation measure]] pages.-->
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[[file:wiki_overview.png|600px|center]]
  
 
=Categories of mitigation measures=
 
=Categories of mitigation measures=
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<font size=3 line-height=10><gallery widths=250px heights=250px>
 
<font size=3 line-height=10><gallery widths=250px heights=250px>
Habitat measures.jpg|link=[[Habitat]]|[[:file:Habitat measures.jpg|Photo]]: Ulrich Pulg<categorytree mode="pages" depth=0  namespaces="Main Category">Habitat measures</categorytree>  
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Habitat icon.png|link=[[Habitat]]|[[:file:Habitat icon.png|Photo]]: Ulrich Pulg<categorytree mode="pages" depth=0  namespaces="Main Category">Habitat measures</categorytree>  
 
E-flow_square.png|link=[[Environmental flow]]|[[:file:E-flow_square.png|Photo]]: Atle Harby<categorytree mode="pages" depth=0  namespaces="Main Category">Environmental flow measures</categorytree>  
 
E-flow_square.png|link=[[Environmental flow]]|[[:file:E-flow_square.png|Photo]]: Atle Harby<categorytree mode="pages" depth=0  namespaces="Main Category">Environmental flow measures</categorytree>  
sediments2_Square.jpg||link=[[Sediments]]|[[:file:sediments2_Square.jpg|Photo]]: NASA<categorytree mode="pages" depth=0 namespaces="Main Category">Sediment measures</categorytree>  
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sediments_icon.png||link=[[Sediments]]|[[:file:sediments_icon.png|Photo]]: NASA<categorytree mode="pages" depth=0 namespaces="Main Category">Sediment measures</categorytree>  
downstream_migration_square.jpg|link=[[Downstream fish migration]]|[[:file:downstream_migration_square.jpg|Photo]]: Tore Wiers<categorytree mode="pages" depth=0 namespaces="Main Category">Downstream fish migration measures</categorytree>  
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downstream_icon.png|link=[[Downstream_icon.png]]|[[:file:downstream_icon.png|Photo]]: Tore Wiers<categorytree mode="pages" depth=0 namespaces="Main Category">Downstream fish migration measures</categorytree>  
Jumping_Salmon_300.jpg|link=[[Upstream fish migration]]|[[:file:Jumping_Salmon_300.jpg|Photo]]: Jerome Charaoui<categorytree mode="pages" depth=0 namespaces="Main Category">Upstream fish migration measures</categorytree>  
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upstream_icon.png|link=[[Upstream fish migration]]|[[:file:upstream_icon.png|Photo]]: Jerome Charaoui<categorytree mode="pages" depth=0 namespaces="Main Category">Upstream fish migration measures</categorytree>  
 
</gallery></font>
 
</gallery></font>
  
=Hydropower and fish: challenges=
+
<!--The first step in this process is to identify what the problems actually are, and what they are caused by. These issues should be chosen from [[:category:classification tables|classification parameter values]] that have been consistently applied for each type of mitigation measure; for example, if there are issues with salmon spawning rates due to a lack of suitable substrate, choose the values "Salmon", "spawning", "substrate". Once the issues are determined, the user can search for the mitigation measure(s) that are appropriate for the given situation following the [[search instructions]].
Hydropower is a very site-specific technology developed where the topography and hydrology are favourable. All hydropower plants require construction of a dam or weir, generally obstructing fish movements. Habitat are altered by imposed changes in flow and/or sediment transport and the set of impacts can be inter-related. The magnitude of the changes in flow is to a large degree determined by the size of the reservoir, making it possible to store water from period of abundant resources to periods of lower inflow. Biology and composition of the fish population is, however, unique to each site. As such, the environmental problems and the related measures are also very specific to each location, posing challenges to presenting generic measures viable to all possible sites, and often the solution will be a combination of measures.
 
  
In general, hydropower [[:category:types of problems|impacts]] on fish can be described as:
+
After identifying the appropriate mitigation measures, the user can learn more about them and how to implement them using the [[Methods, tools, and devices|methods, tools, and devices]] (MTDs) instructions on the [[:category:measures|mitigation measure]] pages.-->
 
 
#direct impacts
 
#impacts on movements
 
#impacts on habitat
 
 
 
The direct impacts could be mortality or injury caused by turbine passage or flushing of sediments, while building a dam will introduce challenges with respect to upstream and downstream migration (impacts on movements). Changes in the natural flow and sediment regime will change the habitat condition, both in the short and long-time horizon.
 

Revision as of 12:42, 21 April 2020

Fithydrologo large.png
Flag of Europe.png

Hydropower and fish: challenges

Hydropower is a very site-specific technology developed where the topography and hydrology are favourable. All hydropower plants require construction of a dam or weir, generally obstructing fish movements. Habitat are altered by imposed changes in flow and/or sediment transport and the set of impacts can be inter-related. The magnitude of the changes in flow is to a large degree determined by the size of the reservoir, making it possible to store water from period of abundant resources to periods of lower inflow. Biology and composition of the fish population is, however, unique to each site. As such, the environmental problems and the related measures are also very specific to each location, posing challenges to presenting generic measures viable to all possible sites, and often the solution will be a combination of measures.

In general, hydropower impacts on fish can be described as:

  1. direct impacts
  2. impacts on movements
  3. impacts on habitat

The direct impacts could be mortality or injury caused by turbine passage or flushing of sediments, while building a dam will introduce challenges with respect to upstream and downstream migration (impacts on movements). Changes in the natural flow and sediment regime will change the habitat condition, both in the short and long-time horizon.

Decision Support System (DSS)

In order to identify the risks, impacts, and appropriate mitigation measures, a decision support system has been (will be) developed.

Click to go to DSS tool (this SHOULD go to the DSS tool in the future)

What is the FIThydro wiki and how do I use it?

This wiki was created to help users implement the appropriate solutions/mitigation measures for environmental problems caused by hydropower production. The mitigation measures are classified according to various parameters, such as appropriate climatic regions, which species they are aimed at, which physical condition they address, etc. Each measure has a suggested procedure with recommended methods, tools, and devices for different stages of the implementation.

Wiki overview.png

Categories of mitigation measures

Click the image to go to the main article for each category. The mitigation measures for each category are listed in the drop-down menus, as well as in the main articles.