High resolution mapping of sediment organic matter from acoustic reflectance data

Natalia Serpetti, Mike Heath, Malcolm Rose, Ursula Witte

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Spatial mapping of the marine environment is challenging when the properties concerned are difficult to measure except by shore-based analysis of
discrete samples of material, usually from sparsely distributed sites. This is the case for many seabed sediment properties. We developed an indirect
approach to mapping the organic content of coastal sediments from hydro-acoustic reflectance data. The basis was that both organic matter and acoustic
reflectance are related to sediment type and grain size composition. Hence there is a collateral relationship between organic matter content and reflectance properties which can be exploited to enable high resolution mapping. We surveyed an area of seabed off the east coast of Scotland using a vessel mounted single beam echosounder with RoxAnn signal processing. Organic carbon, nitrogen and phytoplankton pigment contents were then measured in material from grab and core samples collected at intervals over a year. Relationships between the organic components and hydroacoustic characteristics were derived by general additive models, and used to construct high resolution maps from the acoustic survey data. Our method is an advance on traditional interpolation techniques sparse
spatial data, and represents a generic approach that could be applied to other properties.

LanguageEnglish
Pages265–284
Number of pages20
JournalHydrobiologia
Volume680
Issue number1
DOIs
Publication statusPublished - 30 Jan 2012

Fingerprint

Sediment
Reflectance
Biological materials
reflectance
acoustics
Acoustics
Sediments
High Resolution
organic matter
sediments
sediment
acoustic survey
Core samples
sediment property
Underwater acoustics
Phytoplankton
coastal sediment
signal processing
Organic carbon
Pigments

Keywords

  • acoustic reflectance data
  • high resolution mapping
  • spatial mapping
  • marine systems

Cite this

Serpetti, Natalia ; Heath, Mike ; Rose, Malcolm ; Witte, Ursula. / High resolution mapping of sediment organic matter from acoustic reflectance data. In: Hydrobiologia. 2012 ; Vol. 680, No. 1. pp. 265–284.
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High resolution mapping of sediment organic matter from acoustic reflectance data. / Serpetti, Natalia; Heath, Mike; Rose, Malcolm; Witte, Ursula.

In: Hydrobiologia, Vol. 680, No. 1, 30.01.2012, p. 265–284.

Research output: Contribution to journalArticle

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