BAWiki - User contributions [en]

Ecological Connectivity

2020-10-05T10:09:39Z

Uhlig:

[[de: Ökologische Durchgängigkeit]]
__NOAUTOLINKS__
Since the revised Federal Water Act came into force on 1 March 2010, the German federal government has been responsible for maintaining and restoring ecological connectivity at the damming structures built and operated by the German Federal Waterways and Shipping Administration (WSV). An initial analysis showed that the majority of WSV-operated barrages fail to ensure connectivity and consequently require upstream and downstream fishways to be built.

[[File:Fischfotoweb.png|thumb|500px|Fish (spirlin, ''Alburnoides bipunctatus'') in an experimental flume. The behavioral ecohydraulic experiments are part of the joint project „Ecological connectivity“ by BfG and BAW. Photographer: V. Ridderbusch © BAW/BfG]]

In addition to providing consultancy to the WSV regarding the planning of measures and activities to enable upstream and downstream fish passage, the BAW and the [https://www.bafg.de/EN/Home/homepage_en_node.html Federal Institute of Hydrology (BfG)] are jointly working on research and development projects, often in co-operation with universities. These projects aim at providing answers to unresolved questions that are relevant for planning. There are three fields of research and development.

{|cellpadding=5 cellspacing=0 border=1
|-
|'''[[Ecological Connectivity - Standardisation|Standardisation]]''' The purpose of research work on specific shortcomings of existing design specifications is to develop a standard for upstream and downstream fishways with regard to the conditions on Germany’s federal waterways.
|'''[[Ecological Connectivity - R&D Projects|R&D]]''' Besides the standardisation work, which is very much related to specific elements of fishways, there are a number of research projects dealing with basic issues. These will require additional development work before they can lead to any design specifications.
|'''[[Ecological Connectivity - Pilot Sites|Pilot sites]]''' Another important element in the research work conducted by BAW and BfG are pilot facilities built on different federal waterways. At the pilot sites important questions about the behaviour of fish in their natural environment are to be examined.
|}

*[https://wiki.baw.de/de/index.php/%C3%96kologische_Durchg%C3%A4ngigkeit_-_Publikationen BAW publications on ecological connectivity]

*[[:Category:Glossary|Glossary (including technical terms related to ecological connectivity)]]
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back to: [[Hydraulic Engineering Methods]]

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[[Overview]]

File:Fischfotoweb.png

2020-10-05T10:06:22Z

Uhlig: Fish (spirlin, Alburnoides bipunctatus) in an experimental flume. The behavioral ecohydraulic experiments are part of the joint project „Ecological connectivity“ by BfG and BAW. Photographer: V. Ridderbusch © BAW/BfG

== Summary ==
Fish (spirlin, Alburnoides bipunctatus) in an experimental flume. The behavioral ecohydraulic experiments are part of the joint project „Ecological connectivity“ by BfG and BAW. Photographer: V. Ridderbusch © BAW/BfG

Ecological Connectivity - Pilot Sites

2020-03-26T15:55:48Z

Uhlig:

[[de: Ökologische Durchgängigkeit - Pilotanlagen]]
__NOAUTOLINKS__
[[file: Pilot.png|thumb|Eddersheim barrage (River Main): simplified design of fishway (yellow), entrance sites (red dots), attraction flow (blue triangles) and auxiliary flow conduit (blue arrow) source aerial view: © GeoBasis-DE/BKG 2017]]

To investigate fish movement and flow characteristics it is necessary to observe fish in their natural [[habitat]] and execute hydraulic measurements (here the special focus is on the tailwater of hydro-electric plants). Therefore, BAW and BfG chose seven barrages with hydro-electric plants to be pilot sites for further investigations. The issues in question result from open questions encountered in the counseling of the WSV and still unsolved design problems regarding the state of the art. The focus is on the larger rivers in Germany (with hydro-electric power production) because the available design criteria in Germany rather center on small rivers and creeks. The investigation subjects and the corresponding methods are specified in the fishways R+D program.

Pilot sites are:
* Dörverden (River Weser),
* Koblenz and Lehmen (River Moselle),
* Eddersheim and Wallstadt (River Main),
* Kochendorf and Lauffen (River Neckar)

The Koblenz fishway was completed in 2012, the Lehmen fishway is under construction, the other fishways are in various planning stages including planning-approval/licensing procedure.

The necessary auxiliary water [[discharge]] for creating an adequate [[attraction]] flow relative to the [[discharge]] of the hydraulic power plant is to be investigated at Eddersheim, Wallstadt, Kochendorf und Dörverden. Furthermore, different entrance situations including geometric variations and connections to the [[river bed]] will be examined.

There will also be research on special topics in the design of vertical slot passes such as slot width, slope of the [[fish pass]], flow patterns and the effects of pass length. At Eddersheim parallel structures are proposed to compare different pool sizes and also different pass types. The design of the necessary non-standard pools like connecting pools, auxiliary water quieting and discharge pools also receives special attention.

3-dimensional fluid dynamic modeling on all pilot site tailwaters will generate information for preliminary studies and to interpret fish behavior. These models will be calibrated on on-site measurements. Additionally, hydraulic models will help to understand different construction types of fish passes and the design of non-standard pools.

To understand fish behavior more thoroughly [https://www.baw.de/EN/wasserbau/themen/umwelt/ethohydraulik/ethohydraulik.html etho-hydraulic modeling] (test with living fish) is used to investigate real entrance situations including discharge of auxiliary water into the fishway by means of horizontal screens. This also serves to prepare the investigations at the pilot sites.

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back to: [[Ecological Connectivity]]

Ecological Connectivity - Standardisation

2020-03-26T15:53:37Z

Uhlig:

[[de: Ökologische Durchgängigkeit - Standardisierung]]
__NOAUTOLINKS__
The development of standard solutions for individual elements of upstream and downstream fishways is part of the BAW’s tasks as a consultant to the German Federal Waterways and Shipping Administration (WSV). On the one hand, standards are agreed solutions and may thus contribute to accelerating planning and construction approval procedures as they can be applied directly. On the other hand, since they are tried and tested solutions, standards reduce the uncertainties inherent to the complex field of ecological connectivity. The standards are aligned to the conditions on Germany’s federal waterways.

Standardisation is the result of the BAW’s and BfG’s research and development projects and the consulting services provided by both institutions to the WSV.

The catalogue of existing solutions to different questions, especially in connection with vertical slot passes and fish lifts, has been supported by literature surveys:

*International guidelines for upstream fishways
*Literature survey: special design types for upstream fishways

The following publications are the results of standardisation activities:

*[http://www.baw.de/en/die_baw/publikationen/merkblaetter/index.php.html Guideline (AH FAA 2.0) "Upstream Fishways on German Federal Waterways”]: Standardisation of planning and consulting processes regarding the upstream fishways of the German Federal Waterways and Shipping Administration
*[https://izw.baw.de/publikationen/briefe/0/BAWBrief_02_2016_English.pdf BAW Letter “Requirements for the Planning of Fish Lifts and Fish Locks”]
*Design recommendations for auxiliary water supply in the pools of an upstream fishway: Standardisation of auxiliary water screen and direction and of maximum velocity of the auxiliary water injected into the fishway
*Recommendation for attraction flow design in upstream fishways at sites with hydropower generation facilities for entrances near the power plant: Calculation of the auxiliary water supply as a function of local conditions at power plant sites

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back to: [[Ecological Connectivity]]

Ecological Connectivity

2020-03-26T15:53:17Z

Uhlig:

[[de: Ökologische Durchgängigkeit]]
__NOAUTOLINKS__
Since the revised Federal Water Act came into force on 1 March 2010, the German federal government has been responsible for maintaining and restoring ecological connectivity at the damming structures built and operated by the German Federal Waterways and Shipping Administration (WSV). An initial analysis showed that the majority of WSV-operated barrages fail to ensure connectivity and consequently require upstream and downstream fishways to be built.

In addition to providing consultancy to the WSV regarding the planning of measures and activities to enable upstream and downstream fish passage, the BAW and the [https://www.bafg.de/EN/Home/homepage_en_node.html Federal Institute of Hydrology (BfG)] are jointly working on research and development projects, often in co-operation with universities. These projects aim at providing answers to unresolved questions that are relevant for planning. There are three fields of research and development.

{|cellpadding=5 cellspacing=0 border=1
|-
|'''[[Ecological Connectivity - Standardisation|Standardisation]]''' The purpose of research work on specific shortcomings of existing design specifications is to develop a standard for upstream and downstream fishways with regard to the conditions on Germany’s federal waterways.
|'''[[Ecological Connectivity - R&D Projects|R&D]]''' Besides the standardisation work, which is very much related to specific elements of fishways, there are a number of research projects dealing with basic issues. These will require additional development work before they can lead to any design specifications.
|'''[[Ecological Connectivity - Pilot Sites|Pilot sites]]''' Another important element in the research work conducted by BAW and BfG are pilot facilities built on different federal waterways. At the pilot sites important questions about the behaviour of fish in their natural environment are to be examined.
|}

*[https://wiki.baw.de/de/index.php/%C3%96kologische_Durchg%C3%A4ngigkeit_-_Publikationen BAW publications on ecological connectivity]

*[[:Category:Glossary|Glossary (including technical terms related to ecological connectivity)]]
----
back to: [[Hydraulic Engineering Methods]]

----
[[Overview]]