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Sediment transport and bathymetric change at Hornafjörður tidal inlet - Field data analysis and mathematical modeling

Klante, Clemens LU (2018) In TVVR18/5002 VVRM01 20181
Division of Water Resources Engineering
Abstract
Commercial fishing makes the coastal inlet in Hornafjörður to an important navigational link for the port of Höfn in southeast Iceland. Low water depth caused through sediment accumulation along the ebb shoal generates navigational problems and the phenomenon of glacial rebound seems to intensify this problem. Economic losses caused by the inability of fishing boats to navigate through the coastal inlet due to insufficient water depth along the ebb shoal are estimated with 4.5 million ISK (ca. $ 50.000) per year and effect the local society.
This thesis aims to gain a better understanding of the complex morphology caused by large longshore sediment transports and local gradients with the help of mathematical modeling. With this knowledge... (More)
Commercial fishing makes the coastal inlet in Hornafjörður to an important navigational link for the port of Höfn in southeast Iceland. Low water depth caused through sediment accumulation along the ebb shoal generates navigational problems and the phenomenon of glacial rebound seems to intensify this problem. Economic losses caused by the inability of fishing boats to navigate through the coastal inlet due to insufficient water depth along the ebb shoal are estimated with 4.5 million ISK (ca. $ 50.000) per year and effect the local society.
This thesis aims to gain a better understanding of the complex morphology caused by large longshore sediment transports and local gradients with the help of mathematical modeling. With this knowledge measures such as structures and different activities to ensure sufficient navigational depth can be implement.
A intense investigation of local transport patterns with the help of bathymetry measurements has been carried to intensify the knowledge about local particularities. This knowledge has been used to set up a sufficient mathematical model with the help of the open TELEMAC-MASCARET system.
Results show that the morphologic pattern for high energy events are governed by the tidal flow and wave currents to almost same parts and sediment movements along the ebb shoal could be minimized with the implementation of a structure along the south barrier. (Less)
Popular Abstract
Island states like Iceland need reliable connections to their harbors to ensure the import and export of goods as well as the wealth of industries like fishing. This connection is determined by a sufficient water depth. In coastal areas, especially along the shore and at coastal inlets the sea bed changes constantly and sedimentation can interrupt the nautical connection to the open sea. Due to that, knowledge about how the sea bed behaves is important to help decision makers and engineers to implement strategies and different coastal structures to retain a sufficient water depth for the navigation of water vessels.
Forces created by waves and the tide are the main drivers for the sediments and their interaction is quite complex. Since... (More)
Island states like Iceland need reliable connections to their harbors to ensure the import and export of goods as well as the wealth of industries like fishing. This connection is determined by a sufficient water depth. In coastal areas, especially along the shore and at coastal inlets the sea bed changes constantly and sedimentation can interrupt the nautical connection to the open sea. Due to that, knowledge about how the sea bed behaves is important to help decision makers and engineers to implement strategies and different coastal structures to retain a sufficient water depth for the navigation of water vessels.
Forces created by waves and the tide are the main drivers for the sediments and their interaction is quite complex. Since collecting data regarding this interaction is time-consuming and expensive usually mathematical models which simulate the sea bed movement are used.
This thesis focuses on the sea bed changes at a coastal inlet in the southeastern area of Iceland where shallow water depths lead to financial losses for the local fisheries. Therefore, a mathematical model, as mentioned above is used to gain a better understanding of the local changes. (Less)
Please use this url to cite or link to this publication:
author
Klante, Clemens LU
supervisor
organization
alternative title
Sedimenttransport och batymetrisk förändring vid Hornafjörður tidvatten inlopp - Fältdataanalys och matematisk modellering
course
VVRM01 20181
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Coastal Inlet, Hornafjörður, Morphology, TELEMAC, ebb shoal, mathematical modeling
publication/series
TVVR18/5002
report number
18/5002
ISSN
1101-9824
language
English
additional info
Examiner: Hans Hanson
id
8955078
date added to LUP
2018-07-18 09:00:42
date last changed
2019-03-06 14:17:43
@misc{8955078,
  abstract     = {Commercial fishing makes the coastal inlet in Hornafjörður to an important navigational link for the port of Höfn in southeast Iceland. Low water depth caused through sediment accumulation along the ebb shoal generates navigational problems and the phenomenon of glacial rebound seems to intensify this problem. Economic losses caused by the inability of fishing boats to navigate through the coastal inlet due to insufficient water depth along the ebb shoal are estimated with 4.5 million ISK (ca. $ 50.000) per year and effect the local society.
	This thesis aims to gain a better understanding of the complex morphology caused by large longshore sediment transports and local gradients with the help of mathematical modeling. With this knowledge measures such as structures and different activities to ensure sufficient navigational depth can be implement.
 A intense investigation of local transport patterns with the help of bathymetry measurements has been carried to intensify the knowledge about local particularities. This knowledge has been used to set up a sufficient mathematical model with the help of the open TELEMAC-MASCARET system.
	Results show that the morphologic pattern for high energy events are governed by the tidal flow and wave currents to almost same parts and sediment movements along the ebb shoal could be minimized with the implementation of a structure along the south barrier.},
  author       = {Klante, Clemens},
  issn         = {1101-9824},
  keyword      = {Coastal Inlet,Hornafjörður,Morphology,TELEMAC,ebb shoal,mathematical modeling},
  language     = {eng},
  note         = {Student Paper},
  series       = {TVVR18/5002},
  title        = {Sediment transport and bathymetric change at Hornafjörður tidal inlet - Field data analysis and mathematical modeling},
  year         = {2018},
}