Mapping of seabed and bathymetry in Alssund, Sønderborg. Seismic and acoustic mapping for The Green Water Research Project

Matthew Owen; Jørgen O. Leth

doi:10.22008/gpub/32483

Mapping of seabed and bathymetry in Alssund, Sønderborg. Seismic and acoustic mapping for The Green Water Research Project

Matthew Owen
, Jørgen O. Leth

Near Surface Land and Marine Geology

Research output: Book/Report › Report (publicly available)

Abstract

The Green Water Research Project (GWRP) has asked GEUS to perform a combined geological and bathymetrical survey using high-resolution and high-accuracy multibeam bathymetry, side scan sonar and sub-bottom profiler data in Alssund in Sønderborg. The combination of information on the seabed sediment types and thickness and a detailed bathymetry has shown that at suitable locations for siting the prototype of heat exchange installation are available. There are extensive areas where the water depth exceeds 18 m with sandy or gravelly sediments present. However, the seismic data shows evidences of the presence of gas in large areas of the sub-surface, indicating the presence of fine grained, muddy sediments.

A basin adjacent to the SDU Sønderborg campus seems to be one of the most suitable locations, with water depths reaching 23.6 m and sandy sediments appearing. Steep gradients encountered on the channel margin and the risk of slope failure during or after pipeline installation could be a concern here. An alternative potential area for the project an infilled channel has been designated in Alssund west of Odden.

It is strongly recommended to perform a sediment sampling programme to verify the seismic and acoustic
interpretations.

Original language	English
Place of Publication	Copenhagen
Publisher	GEUS
Commissioning body	Green Water Research Project (GWRP)
Number of pages	26
Volume	2016
DOIs	https://doi.org/10.22008/gpub/32483
Publication status	Published - 20 Dec 2016

Publication series

Series	Danmarks og Grønlands Geologiske Undersøgelse Rapport
Number	62
Volume	2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Denmark

Programme Area

Programme Area 5: Nature and Climate

Access to Document

10.22008/gpub/32483

https://data.geus.dk/pure-pdf/32483_GEUS-R_2016_62_opt.pdfLicence: Unspecified

Cite this

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title = "Mapping of seabed and bathymetry in Alssund, S{\o}nderborg. Seismic and acoustic mapping for The Green Water Research Project",

abstract = "The Green Water Research Project (GWRP) has asked GEUS to perform a combined geological and bathymetrical survey using high-resolution and high-accuracy multibeam bathymetry, side scan sonar and sub-bottom profiler data in Alssund in S{\o}nderborg. The combination of information on the seabed sediment types and thickness and a detailed bathymetry has shown that at suitable locations for siting the prototype of heat exchange installation are available. There are extensive areas where the water depth exceeds 18 m with sandy or gravelly sediments present. However, the seismic data shows evidences of the presence of gas in large areas of the sub-surface, indicating the presence of fine grained, muddy sediments. A basin adjacent to the SDU S{\o}nderborg campus seems to be one of the most suitable locations, with water depths reaching 23.6 m and sandy sediments appearing. Steep gradients encountered on the channel margin and the risk of slope failure during or after pipeline installation could be a concern here. An alternative potential area for the project an infilled channel has been designated in Alssund west of Odden. It is strongly recommended to perform a sediment sampling programme to verify the seismic and acoustic interpretations.",

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AU - Leth, Jørgen O.

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N2 - The Green Water Research Project (GWRP) has asked GEUS to perform a combined geological and bathymetrical survey using high-resolution and high-accuracy multibeam bathymetry, side scan sonar and sub-bottom profiler data in Alssund in Sønderborg. The combination of information on the seabed sediment types and thickness and a detailed bathymetry has shown that at suitable locations for siting the prototype of heat exchange installation are available. There are extensive areas where the water depth exceeds 18 m with sandy or gravelly sediments present. However, the seismic data shows evidences of the presence of gas in large areas of the sub-surface, indicating the presence of fine grained, muddy sediments. A basin adjacent to the SDU Sønderborg campus seems to be one of the most suitable locations, with water depths reaching 23.6 m and sandy sediments appearing. Steep gradients encountered on the channel margin and the risk of slope failure during or after pipeline installation could be a concern here. An alternative potential area for the project an infilled channel has been designated in Alssund west of Odden. It is strongly recommended to perform a sediment sampling programme to verify the seismic and acoustic interpretations.

AB - The Green Water Research Project (GWRP) has asked GEUS to perform a combined geological and bathymetrical survey using high-resolution and high-accuracy multibeam bathymetry, side scan sonar and sub-bottom profiler data in Alssund in Sønderborg. The combination of information on the seabed sediment types and thickness and a detailed bathymetry has shown that at suitable locations for siting the prototype of heat exchange installation are available. There are extensive areas where the water depth exceeds 18 m with sandy or gravelly sediments present. However, the seismic data shows evidences of the presence of gas in large areas of the sub-surface, indicating the presence of fine grained, muddy sediments. A basin adjacent to the SDU Sønderborg campus seems to be one of the most suitable locations, with water depths reaching 23.6 m and sandy sediments appearing. Steep gradients encountered on the channel margin and the risk of slope failure during or after pipeline installation could be a concern here. An alternative potential area for the project an infilled channel has been designated in Alssund west of Odden. It is strongly recommended to perform a sediment sampling programme to verify the seismic and acoustic interpretations.

KW - Denmark

U2 - 10.22008/gpub/32483

DO - 10.22008/gpub/32483

M3 - Report (publicly available)

VL - 2016

T3 - Danmarks og Grønlands Geologiske Undersøgelse Rapport

BT - Mapping of seabed and bathymetry in Alssund, Sønderborg. Seismic and acoustic mapping for The Green Water Research Project

PB - GEUS

CY - Copenhagen

ER -

Mapping of seabed and bathymetry in Alssund, Sønderborg. Seismic and acoustic mapping for The Green Water Research Project

Abstract

Publication series

UN SDGs

Keywords

Programme Area

Access to Document

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Cite this