As a world leader in coastal change monitoring, ARGANS Ltd is delivering a global service for monitoring coastal erosion, environmental risk assessment, and research on the potential impact of climate change on the coast, including sea level rise and effect of increasingly dynamic weather systems.
We are leading a project funded by ESA to assess the end-user benefits from such a service, bringing together professional geomorphological expertise from partners at the British Geological Survey (BGS), the Geological Survey Ireland (GSI), the Environmental Hydaulic Institute Cantabria and Arctus, working with the University of Quebec, Rimouski (UQAR) as part of a Coastal Change consortium.
ARGANS Ltd is focused on conducting assessments over 25 years using a range of satellite sensors such as Copernicus Sentinel Multispectral and SAR data, USGS Landsat data supported with a blend of some commercial data provided by the ESA Third Party Mission programme. Monitoring Coastal Erosion by employing a range of innovative Satellite Imagery techniques enables a large spatial scale and a high temporal and spatial resolution to be delivered in an affordable manner which can be made applicable to anywhere around the world.
Analysing 25 years of data from ESA Sentinel-1, Sentinel-2 and NOAA Landsat archives to monitor historic change.
Conducting an initial coastline analysis of coastal sites in Canada, Ireland, Spain and the UK providing products driven by the needs of the user community..
Engaging with scientists and end users alike from around the world to develop cutting edge applications.
Land and water can be divided into binary classes using both Sentinel-2 VNIR (LiuJezek_CoastL processor) and Sentinel-1 SAR satellite imagery. The boundary between these two regions can then be extracted, vectorised, and finally contextualised with local tidal data to produce a waterline product. The image is of the Start Bay test site.
Seasonal Highest Astronomical Tide (HAT) Shoreline Change | Wexford, Ireland
The detected waterline is further processed to take into consideration the beach profile and adjust to a tidal datum i.e. a fixed elevation corresponding to a mean or extreme value of tidal elevation. The animation is of the shoreline corresponding to Highest Astronomical Tide (HAT) datum at Wexford, Ireland.
Coastal waters are dynamic and changing environments. We are using satellite derived bathymetry (SDB) techniques to monitor seabed change in coastal environments to aid the quantification of sediment transport in the nearshore.
This image of the coast of Guadeloupe shows the Sentinel-2 image overlaid with the processed Digital Terrain Map (DTM) image. DTMs from the same area but over a long temporal scale can then be analysed to quantify any changes in the seabed that have occurred. More information is available on ARGANS SDB website.
Another approach uses 10m resolution Sentinel-1 synthetic aperture radar (SAR) images to detect sea surface waves. By analysing this regional wave field we can identify the wave’s direction, frequency and wave length, and, under ideal weather conditions, this extracted information is used to deduce the underlying seabed morphology. This image shows the detected wave field from a Sentinel-1 SAR image.
Visible and Near Infra-red (NIR) images from Very High Resolution (VHR) optical sensors, such carried on the WorldView satellite, can also be processed to detect waves and estimate wavelengths. The images show this approach being used for the Barcelona El Prat test site.
Both the SAR and optical sensor approach can be used to deduce the underlying seabed morphology. The advantage of SAR is that it penetrates clouds, whereas optical methods require cloud free images. Both are however susceptible due to strong winds. The images are of the Barcelona El Prat test site showing the raw image and estimated bathymetry (darker is shallower).
The objective of the project is to determine the feasibility of using satellite images to monitor coastal change i.e. to detect when and where erosion and/or accretion have occurred and ultimately to determine the rate of change, essentially the volume of sediment being eroded / accreted over time based on the past weather and climate conditions. If this is feasible then results could be used to forecast potential scenarios for coastal change resulting from climate change.
During Phase 1 five test areas were selected: Longue Pointe de Mingan, Qeubec, Start Bay & Perranporth, UK, the Wexford Coast south of Dublin, Ireland and the Spanish coast between El Prat South of Barcelona and the Tordera Delta. Subsequently another 15 sites have been added for Phase 2 and all sites are displayed on the map.
The coastal erosion project requires data from varied sources: public freely downloadable global satellite imagery along with Very High Resolution (VHR) images from commercial third-party suppliers, and regional auxiliary data including tidal predictions, or preferably in situ tide gauge measurements, wind speed, wave direction and, importantly, tidal datums from regional observatories. Some of the complexity of the data flow is captured in this infographic.
The health of coral reefs provide accurate markers of the current state of climate change. ARGANS' objectives within ESA's SEOM Coral Monitoring Program are the scientific exploitation and validation of the Sentinel-2 Multispectral Instrument for mapping (habitat, bathymetry and water quality) and change detection for coral reef health assessment and monitoring
ARGANS has developed innovative methodologies for generating IHO-compliant nautical charts derived from satellite multi-spectral images. The images are processed using an adaptive look-up table physics-based inversion technique, with the assistance of one of our collaborators, under contract to the French Hydrographical & Oceanographic Office (SHOM).
This project uses optical images from ESA’s Sentinel-2 satellite to detect marine litter floating on the sea surface. By analysing the reflectance values of the pixels composing the image, litter can be differentiated from its surroundings. A processor has been developed with the overall aim to detect marine litter to inform future models and other applications.
ARGANS, is a UK-registered company with headquarters based in Plymouth UK, offices in Sophia-Antipolis and Brest, and staff located in London and Southampton.
We are specialists in satellite-based Earth Observation, remote-sensing applications and services, and geographical information systems used to map and monitor the marine, atmospheric and terrestrial environments. The team at ARGANS are also industry standard professionals in coastal charting through the application of satellite derived bathymetry.
ARGANS offers satellite mission solutions across a range of services, including development of ground segment algorithms and applications, data quality assessment and validation, or operations on behalf of space agencies, while keeping a strong scientific expertise in remote sensing science.
The company has forged strong partnerships through joining consortia both as prime and sub-contractor with UK, European and International entities: companies, research institutes, universities and individual scientific consultants.
The British Geological Survey (BGS) is a world-leading geological research organisation.
It focuses on public-good science for government, and research to understand earth and environmental processes.The BGS provides expert services and impartial advice in all areas of geoscience. BGS performs science-based work on coastal erosion.
IsardSAT mission is to improve the knowledge of our planet Earth through Remote Sensing.
IsardSAT develops engineering and scientific projects with the objective of becoming the leading company in active and passive microwave remote sensing and preferred partner in the Earth Observation research field.
IGN FI has established itself as a leader in geomatic projects, working with the predominant policy makers, both public and private.
The company has provided indispensable support tools for decision-making, particularly in the fields of land planning, the environment, agriculture, land administration, civil security, risk management, transport, tourism and more. The company offers services tailored to client needs in its fields of expertise: geodesy, metrology, cartography / national spatial data infrastructure, databases, geographic information systems (GIS), themed portals, land management information systems.
The Environmental Hydraulics Institute “IHCantabria” is a joint research centre.
IHC carries out research, knowledge transfer and training of specialists in the fields of fresh and saltwater. IHC’s mission is to become a centre of international reference both in basic and applied research and in the development of studies, methodologies and tools for theintegrated management of aquatic ecosystems. The Subdirección General para la Protección de la Costa (SGPC) has tasked IHCantabria to report on the new potential of EO to develop a Spanish Coastal Vulnerability Index and to describe changes in coastal morphology and to automatically detect erosion due to both natural and anthropogenic causes.
Geological Survey Ireland (GSI) are committed to providing free, open and accurate data and maps.
Geological Survey Ireland (GSI) are committed to providing free, open and accurate data and maps.
ARCTUS is a private Research and Development (R&D) company providing applications in remote sensing, Earth Observation (EO) and Geographical Information System (GIS).
ARCTUS provide R&D services to governmental agencies, scientific communities and the general public. ARCTUS is specialised in optical remote sensing of aquatic environments, from lakes to oceans. The main goals for the coastal change project are to acquire knowledge on coastal erosion dynamics in order to mitigate the impacts on the communities that occupy the shores and coasts and to develop a Geographic Information Systems (GIS) with indexes and parameters for the assessment of coastal vulnerability to erosion to help communities, municipalities and decision makers.
AdwäisEO is an ACRI company that provides leading data services for space agencies, companies, public institutions and research centres.
Their mission is to provide the best geo-intelligence source and repository available. To name a few of their services, they provide secure data storage and management, give access to open geo-referenced data and extract relevant information for clients such as the European Space Agency
The Université du Québec à Rimouski is a French-language public university that offers academic training throughout Eastern Quebec.