Using Shared Hydrospatial Data to Help Protect Vulnerable Coastlines
A new hydrospatial approach that integrates traditional hydrographic data with additional applications is set to play a key role in monitoring the impacts of climate change on coastlines and oceans around the globe.
Hydrographers once focused primarily on collecting data to update nautical charts for safe navigation, but they have since expanded their scope. They now integrate data from a range of applications to deliver a richer, more comprehensive hydrospatial overview.
Understanding our oceans
A key driver of this trend is government and private-sector clients’ desire to gain a deeper understanding of the oceans, including currents and tides, sea level rises, seabed morphology and sediment transportation. When hydrographic data is combined with additional data sources including topographic data, benthic habitat maps (aerial imagery, subsea imagery, acoustic surveys, etc.) and metocean information (tidal and current data) it can shed new light on key climate change issues including:
- Coastal erosion;
- Coastal communities at risk from rising sea levels;
- The impact of rising temperatures on marine life;
- The effectiveness of carbon-capture initiatives such as seagrass restoration projects.
Many clients who are adopting this new hydrospatial approach to data collection and analysis also want to reduce their costs and carbon footprint. They often pass on these requirements to the suppliers who acquire the data on their behalf.
Sharing information for the benefit of humanity
A further driver of the hydrospatial approach is the Seabed 2030 Project, which aims to create a map of the Earth’s Ocean floor by 2030 and make it available to all.
UNESCO is one of the project’s main supporters. According to its Intergovernmental Oceanographic Commission (IOC) experts, mapping 80 % of the seabed by 2030 will cost around US$5 billion – that’s an average of US$625 million a year for the next eight years. The IOC estimate is based on mobilizing at least 50 vessels dedicated to seabed mapping and increasing the use of sonar on autonomous vessels. It also relies on the willingness of governments and corporations to share their archived bathymetric data.
Many governments have welcomed the opportunity to extract more value from their existing (publicly funded) data by making it available for a range of additional purposes. Examples include ocean science and coastal resilience applications including the mapping of flood defenses and areas for coastal protection, and for habitat mapping and restoration.
The Tuvalu Coastal Adaptation Project provides a great example. This small island has introduced a range of measures to reduce its exposure to coastal hazards and is sharing the information openly, for the benefit of humanity. The hydrographic industry is also expanding into other markets and undertaking cable route surveys, pre-seismic surveys and supporting offshore wind farm developments.
Hydrographic surveying technologies mapping the seabed along the coastline and nearshore
Innovative hydrospatial solution
Fugro has responded to the growing need for hydrospatial solutions by developing an integrated suite of hydrographic surveying technologies:
- Satellite imagery– we use this to derive quantitative bathymetric products in shallow waters. Applications include mapping the shoreline, seabed morphology and marine habitats, as well as detecting changes over time;
- Airborne lidar bathymetry (ALB) – this enables efficient surveys spanning large areas of coastline and shallow water. Our advanced, in-house ALB systems can measure depths of up to three times the water clarity. They include our laser airborne depth sounder and our rapid airborne multibeam mapping system, which can operate simultaneously with topographic or bathymetric lidar sensors to deliver high-resolution data;
- Acoustic surveys – from the nearshore to full ocean depths, acoustic surveys use hydrographic technologies to acquire high-quality data. Using an uncrewed surface vessel (USV) such as Fugro Blue ShadowTM for surveying activity as a force multiplier. By shadowing the parent vessel, the Blue ShadowTM enables accurate hydrographic data to be collected safely, efficiently and simultaneously across a larger geographic area. The USV significantly reduces HSSE exposure and has a very low carbon footprint. We are now developing a new generation of vessels with over-the-horizon, autonomous capabilities. They will be controlled by Fugro’s global network of remote operation centers.
Global warming will trigger more frequent and intense storms and rising sea levels. These will have a negative effect on coastal communities around the world. The foundation datasets provided by hydrospatial solutions will be essential to building long-term coastal resilience.