Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring
As all of Sweden's hydropower is to be re-examined within a 20-year period, methods are needed to carry out ecological investigations of dammed waterways. The first aim of this thesis is to evaluate whether methods for salmon and trout habitat mapping take all relevant indicators into account....
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Uppsala universitet, Luft-, vatten- och landskapslära
2023
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ftuppsalauniv:oai:DiVA.org:uu-509385 2023-09-05T13:18:12+02:00 Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring Evaluation of hydraulic simulation as a habitat estimation method for Atlantic salmon and brown trout Axelsson, Oscar 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509385 swe swe Uppsala universitet, Luft-, vatten- och landskapslära UPTEC W, 1401-5765 23025 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509385 info:eu-repo/semantics/openAccess Habitat mapping ecohydraulics Atlantic salmon brown trout habitatkartering ekohydraulik lax öring Ocean and River Engineering Havs- och vattendragsteknik Student thesis info:eu-repo/semantics/bachelorThesis text 2023 ftuppsalauniv 2023-08-23T22:31:28Z As all of Sweden's hydropower is to be re-examined within a 20-year period, methods are needed to carry out ecological investigations of dammed waterways. The first aim of this thesis is to evaluate whether methods for salmon and trout habitat mapping take all relevant indicators into account. In addition, the report aims to investigate which factors affect the results of habitat mapping based on hydraulic simulation and to investigate whether this method can be made more efficient through the use of simpler models, drone images and calculations. The work began with a literature study. A model was then built over a dammed stretch where mapping through hydraulic simulation was carried out. A mapping was then carried out on another stretch of stream based on a simpler model, drone images and shadow calculations, in parallel with a field mapping. The results of the literature study showed that the mapping methods capture the physical indicators well and indirectly link to certain chemical and ecological indicators. The method could be improved by including the water's nitrogen content and pH in the assessment.Important factors in habitat estimation with hydraulic simulation are the flow and the accuracy of the terrain model, as well as how the result is produced. The result from mapping with a simpler hydraulic model showed large deviations from the results obtained in the field, with respect above all to depth and width. Drone imagery for substrate assessment works well in shallow and clear water bodies. Shadow calculations based on how they were applied in this work to habitat mapping have not given satisfactory results, why the method needs to be developed. Då all Sveriges vattenkraft ska omprövas inom en 20-årsperiod behövs metoder för att genomföra ekologiska utredningar av uppdämda vattendrag. Det första syftet med detta examensarbete är att utvärdera om metoder för lax- och öringhabitatkartering tar hänsyn till alla relevanta indikatorer. Därutöver syftar rapporten till att undersöka vilka faktorer som ... Bachelor Thesis Atlantic salmon Uppsala University: Publications (DiVA) |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
Swedish |
topic |
Habitat mapping ecohydraulics Atlantic salmon brown trout habitatkartering ekohydraulik lax öring Ocean and River Engineering Havs- och vattendragsteknik |
spellingShingle |
Habitat mapping ecohydraulics Atlantic salmon brown trout habitatkartering ekohydraulik lax öring Ocean and River Engineering Havs- och vattendragsteknik Axelsson, Oscar Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
topic_facet |
Habitat mapping ecohydraulics Atlantic salmon brown trout habitatkartering ekohydraulik lax öring Ocean and River Engineering Havs- och vattendragsteknik |
description |
As all of Sweden's hydropower is to be re-examined within a 20-year period, methods are needed to carry out ecological investigations of dammed waterways. The first aim of this thesis is to evaluate whether methods for salmon and trout habitat mapping take all relevant indicators into account. In addition, the report aims to investigate which factors affect the results of habitat mapping based on hydraulic simulation and to investigate whether this method can be made more efficient through the use of simpler models, drone images and calculations. The work began with a literature study. A model was then built over a dammed stretch where mapping through hydraulic simulation was carried out. A mapping was then carried out on another stretch of stream based on a simpler model, drone images and shadow calculations, in parallel with a field mapping. The results of the literature study showed that the mapping methods capture the physical indicators well and indirectly link to certain chemical and ecological indicators. The method could be improved by including the water's nitrogen content and pH in the assessment.Important factors in habitat estimation with hydraulic simulation are the flow and the accuracy of the terrain model, as well as how the result is produced. The result from mapping with a simpler hydraulic model showed large deviations from the results obtained in the field, with respect above all to depth and width. Drone imagery for substrate assessment works well in shallow and clear water bodies. Shadow calculations based on how they were applied in this work to habitat mapping have not given satisfactory results, why the method needs to be developed. Då all Sveriges vattenkraft ska omprövas inom en 20-årsperiod behövs metoder för att genomföra ekologiska utredningar av uppdämda vattendrag. Det första syftet med detta examensarbete är att utvärdera om metoder för lax- och öringhabitatkartering tar hänsyn till alla relevanta indikatorer. Därutöver syftar rapporten till att undersöka vilka faktorer som ... |
format |
Bachelor Thesis |
author |
Axelsson, Oscar |
author_facet |
Axelsson, Oscar |
author_sort |
Axelsson, Oscar |
title |
Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
title_short |
Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
title_full |
Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
title_fullStr |
Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
title_full_unstemmed |
Utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
title_sort |
utvärdering av hydraulisk simulering som metod för habitatskattning för lax och öring |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509385 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
UPTEC W, 1401-5765 23025 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-509385 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1776199223572692992 |