Longshore Sediment Transport Along the Coast of Ystad Municipality
(2022) In TVVR22/5015 VVRM05 20212Division of Water Resources Engineering
- Abstract
- The coast of Ystad municipality has historically been subject to erosion, leading to the loss of recreational areas and near-beach structures, consequently resulting in the implementation of mitigating measures. With the ongoing climate change, erosion is expected to continue. This generates a need for a better understanding of sediment dynamics and sediment transport patterns, in order to further plan for coastal management in Ystad municipality. This thesis focused on obtaining further information about the coast of Ystad municipality through field surveys and modelling of longshore sediment transport. The modelled sediment transport showed an overall eastern transport direction, with some coastal stretches indicating an alternating... (More)
- The coast of Ystad municipality has historically been subject to erosion, leading to the loss of recreational areas and near-beach structures, consequently resulting in the implementation of mitigating measures. With the ongoing climate change, erosion is expected to continue. This generates a need for a better understanding of sediment dynamics and sediment transport patterns, in order to further plan for coastal management in Ystad municipality. This thesis focused on obtaining further information about the coast of Ystad municipality through field surveys and modelling of longshore sediment transport. The modelled sediment transport showed an overall eastern transport direction, with some coastal stretches indicating an alternating transport direction, which was confirmed through observations. The greatest transport magnitudes were found along beaches that have historically been subjected to erosion and accumulation. Further, small changes in shoreline orientation had a large impact on both direction and magnitude of the modelled sediment transport. Grain size statistics derived from sediment field samples resulted in a correlation between median grain size, sorting, and beach face slope. The results showed a correlation between eroded beaches and coarser, less sorted sediment and a steeper beach face slope, whereas accumulated beaches were correlated with a finer, more well sorted material and a gentler slope. Nourished beaches were found to affect the correlations negatively, since nourishing both impacts the shape of the beach profile and the distribution of grain sizes. Further recurring field sampling is recommended for broader comprehension of grain size patterns along the coast and how nourishing affects these on a longer timescale. (Less)
- Popular Abstract (Swedish)
- Sandstränder utgör en stor del av Ystads kust och används flitigt för bad och hundpromenader och är en stor del av kommunens turism. Förutom att glädja besökare fungerar de även som skydd mot översvämningar och hindrar havet från att nå vägar och byggnader vid högvatten eller stormar. I takt med klimatförändringarna finns det ett ökat hot för att stränderna ska erodera bort, genom att sand transporteras bort från stränderna med strömmar längs med kusten. För att kunna planera för olika strandskyddsåtgärder, behövs kunskap kring sedimentdynamiken i området. Det här examensarbetet ämnade att undersöka hur mycket sand som transporteras längs kusten och i vilken riktning detta sker. Arbetet syftade även till att undersöka strändernas utseende... (More)
- Sandstränder utgör en stor del av Ystads kust och används flitigt för bad och hundpromenader och är en stor del av kommunens turism. Förutom att glädja besökare fungerar de även som skydd mot översvämningar och hindrar havet från att nå vägar och byggnader vid högvatten eller stormar. I takt med klimatförändringarna finns det ett ökat hot för att stränderna ska erodera bort, genom att sand transporteras bort från stränderna med strömmar längs med kusten. För att kunna planera för olika strandskyddsåtgärder, behövs kunskap kring sedimentdynamiken i området. Det här examensarbetet ämnade att undersöka hur mycket sand som transporteras längs kusten och i vilken riktning detta sker. Arbetet syftade även till att undersöka strändernas utseende och uppbyggnad samt om sandkornen kan avslöja något om hur stränderna mår. Genom att studera både de övergripande transportmönstren och de minsta beståndsdelarna, ges en god grund till framtidens kustförvaltning i Ystad. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9096094
- author
- Berin, Isa LU and Jacobson Löwdin, Johanna LU
- supervisor
- organization
- alternative title
- Kustparallell sedimenttransport längs Ystad kommuns kust
- course
- VVRM05 20212
- year
- 2022
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Coastal erosion, sediment dynamics, longshore sediment transport, CERC, shoreline change
- publication/series
- TVVR22/5015
- report number
- 22/5015
- ISSN
- 1101-9824
- language
- English
- additional info
- Examiner: Magnus Larson
- id
- 9096094
- date added to LUP
- 2022-07-13 10:49:24
- date last changed
- 2022-07-13 10:49:24
@misc{9096094,
abstract = {{The coast of Ystad municipality has historically been subject to erosion, leading to the loss of recreational areas and near-beach structures, consequently resulting in the implementation of mitigating measures. With the ongoing climate change, erosion is expected to continue. This generates a need for a better understanding of sediment dynamics and sediment transport patterns, in order to further plan for coastal management in Ystad municipality. This thesis focused on obtaining further information about the coast of Ystad municipality through field surveys and modelling of longshore sediment transport. The modelled sediment transport showed an overall eastern transport direction, with some coastal stretches indicating an alternating transport direction, which was confirmed through observations. The greatest transport magnitudes were found along beaches that have historically been subjected to erosion and accumulation. Further, small changes in shoreline orientation had a large impact on both direction and magnitude of the modelled sediment transport. Grain size statistics derived from sediment field samples resulted in a correlation between median grain size, sorting, and beach face slope. The results showed a correlation between eroded beaches and coarser, less sorted sediment and a steeper beach face slope, whereas accumulated beaches were correlated with a finer, more well sorted material and a gentler slope. Nourished beaches were found to affect the correlations negatively, since nourishing both impacts the shape of the beach profile and the distribution of grain sizes. Further recurring field sampling is recommended for broader comprehension of grain size patterns along the coast and how nourishing affects these on a longer timescale.}},
author = {{Berin, Isa and Jacobson Löwdin, Johanna}},
issn = {{1101-9824}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVVR22/5015}},
title = {{Longshore Sediment Transport Along the Coast of Ystad Municipality}},
year = {{2022}},
}