The University of Southampton
University of Southampton Institutional Repository

Historic evolution of a marsh island: Bloodsworth Island, Maryland

Historic evolution of a marsh island: Bloodsworth Island, Maryland
Historic evolution of a marsh island: Bloodsworth Island, Maryland
High rates of relative sea-level rise in the Chesapeake Bay of about 0.3 m/century has caused rapid land loss of the Bay islands. This study is the first quantitative analysis of both perimeter and interior land loss for one of the large marsh islands?Bloodsworth Island. A geographical information system (GIS) was used for the analysis at a resolution of about 16 meters. From 1849 to 1992, the area of Bloodsworth Island declined by 579 ha, or 26% of the land area in 1849. The land loss can be divided into four geomorphic types: perimeter land loss, channel widening, channel ponding, and non- channel ponding. Perimeter land loss is largest at 3.0 ha/yr from 1942 to 1992, but the three interior land loss types are also significant, totalling 1.6 ha/yr from 1942 to 1992. Channel ponding and widening were responsible for nearly all interior land loss prior to 1942. The initial formation of non- channel ponds is attributed to a short-term acceleration in sea-level rise (to 7 mm/yr from 1930 to 1948). Subsequently, non-channel ponding has been significant, particularly in the southeastern quadrant of the island. Compared to the mainland marshes, interior land loss has occurred at much slower rates; this is probably due to the low thickness of the marsh deposits on Bloodsworth. To date, bombing appears to have only had a secondary impact on land loss at the scale of this study. In the future, the island appears increasingly vulnerable to interior break- up, particularly given another short-term acceleration of sea-level rise.
0749-0208
1031-1044
Downs, L.L.
67d598ad-18eb-4005-8107-3e69befbff55
Nicholls, R.J.
4ce1e355-cc5d-4702-8124-820932c57076
Leatherman, S.P.
a4f7e57b-5601-4474-960e-aa31f6dc656f
Hautzenroder, J.
09cece8d-1ad6-4427-86e3-58106a30d751
Downs, L.L.
67d598ad-18eb-4005-8107-3e69befbff55
Nicholls, R.J.
4ce1e355-cc5d-4702-8124-820932c57076
Leatherman, S.P.
a4f7e57b-5601-4474-960e-aa31f6dc656f
Hautzenroder, J.
09cece8d-1ad6-4427-86e3-58106a30d751

Downs, L.L., Nicholls, R.J., Leatherman, S.P. and Hautzenroder, J. (1994) Historic evolution of a marsh island: Bloodsworth Island, Maryland. Journal of Coastal Research, 10 (4), Autumn Issue, 1031-1044.

Record type: Article

Abstract

High rates of relative sea-level rise in the Chesapeake Bay of about 0.3 m/century has caused rapid land loss of the Bay islands. This study is the first quantitative analysis of both perimeter and interior land loss for one of the large marsh islands?Bloodsworth Island. A geographical information system (GIS) was used for the analysis at a resolution of about 16 meters. From 1849 to 1992, the area of Bloodsworth Island declined by 579 ha, or 26% of the land area in 1849. The land loss can be divided into four geomorphic types: perimeter land loss, channel widening, channel ponding, and non- channel ponding. Perimeter land loss is largest at 3.0 ha/yr from 1942 to 1992, but the three interior land loss types are also significant, totalling 1.6 ha/yr from 1942 to 1992. Channel ponding and widening were responsible for nearly all interior land loss prior to 1942. The initial formation of non- channel ponds is attributed to a short-term acceleration in sea-level rise (to 7 mm/yr from 1930 to 1948). Subsequently, non-channel ponding has been significant, particularly in the southeastern quadrant of the island. Compared to the mainland marshes, interior land loss has occurred at much slower rates; this is probably due to the low thickness of the marsh deposits on Bloodsworth. To date, bombing appears to have only had a secondary impact on land loss at the scale of this study. In the future, the island appears increasingly vulnerable to interior break- up, particularly given another short-term acceleration of sea-level rise.

Full text not available from this repository.

More information

Published date: 1994
Organisations: Energy & Climate Change Group

Identifiers

Local EPrints ID: 353134
URI: https://eprints.soton.ac.uk/id/eprint/353134
ISSN: 0749-0208
PURE UUID: 2df57c84-8fa4-40b6-bc3f-ad338cb477ca
ORCID for R.J. Nicholls: ORCID iD orcid.org/0000-0002-9715-1109

Catalogue record

Date deposited: 18 Jun 2013 13:00
Last modified: 06 Jun 2018 12:44

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×