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Airborne hyperspectral potential for coastal biogeochemistry of the Scheldt estuary and plume
Shimoni, Michal; Sirjacobs, Damien; Borges, Alberto et al.
2003Proceedings of the 23rd EARSeL Annual Symposium « Remote Sensing in Transition », first International Workshop on Costal Zone
 

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Keywords :
Estuaries; Scheldt; Biogeochemistry; Remote sensing; airborne; CASI; Coastal zone
Abstract :
[en] Estuaries are obligate pathways for the transfer of dissolved and particulate material from the continent to the marine system. The tidal regime of some estuaries leads to an increased residence time of the freshwater in the estuarine mixing zone and pronounced changes in the speciation of elements. European estuaries are subject to intense anthropogenic disturbance reflected in elevated loading of detrital organic matter, which induce high respiration rates and the production of large quantities of dissolved CO2. The Scheldt basin covers one of the most populated and industrialised areas of Europe and its tributaries drain an area of about 21,860 km2. The amounts of nutrients discharged by the Scheldt increased considerably during the past 20 years. Due to the dilution and metabolic processes of the downstream river flow in the estuary, an important variability of several parameters can be observed amongst which phytoplankton species and concentration, particulate organic matter, colour dissolved organic matter and suspended matter. In the present days, researches on the functioning of estuarine and coastal ecosystems are based on highly time consuming, costly sea campaigns and laboratory analyses. Although optical spaceborne remote sensing already proved useful in such coastal ecosystems studies, hyperspectroscopy opened a new dimension by allowing improved distinction of various biogeochemical compounds through characteristic spectral signature identification. The goal of this research is to explore the potential of CASI-SWIR airborne hyperspectroscopy in retrieving some of the biogeochemical parameters of interest in the Schedlt estuary and plume (Belgium-Netherlands coastal zone). A 13 sampling stations field survey was realised in order to cover as quickly as possible the wide range of water quality encountered from the mouth of the estuary to the outer limit of the plume. The numerous parameters and spectrum measured in each station were used for further remote sensing analysis, as well as to complete the interpretation of the observed environmental processes. Correlation was searched between classical ground truth measurements and the rich information provided by numerous CASI-SWIR spectral bands carefully chosen. These relations were used as an attempt to derive synoptic view of the spatial distribution of various biogeochemical parameters in the Scheldt estuary and plume. Synthesis of these hyperspectral-mapping products with other complementary satellite maps and ground data set may allow ocean scientists to derive substantial information about ecosystem processes in the Scheldt estuary and adjacent coast.
Research center :
Royal Military Academy; Centre Interfacultaire de Recherches en Océanologie - MARE
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Aquatic sciences & oceanology
Author, co-author :
Shimoni, Michal;  RMA > Electronic Department > Signal and Image Center
Sirjacobs, Damien ;  Université de Liège - ULiège > Département des sciences de la vie > Algologie, mycologie et systématique expérimentale
Borges, Alberto  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Frankignoulle, Michel;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
Acheroy, Marc;  RMA > Electronic Department > Signal and Image Center
Djenidi, Salim ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
Chou, Lei;  Université Libre de Bruxelles - ULB > Sciences de la Terre et Environnement > Océanographie chimique et Géochimie des Eaux (LOCGE)
Vyvermans, Wim;  Universiteit Gent - Ugent > Department of Biology
Language :
English
Title :
Airborne hyperspectral potential for coastal biogeochemistry of the Scheldt estuary and plume
Publication date :
June 2003
Event name :
Proceedings of the 23rd EARSeL Annual Symposium « Remote Sensing in Transition », first International Workshop on Costal Zone
Event organizer :
EARSeL
Event place :
Gent, Belgium
Event date :
5-7 June 2003
Audience :
International
Name of the research project :
Airborne Hyperspectral Potential for Coastal Biogeochemistry of the Scheldt Estuary and Plume
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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since 09 December 2010

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