Skip to content

Surveys Related to Properties of Aquatic Sediments

GTK has Finland’s most versatile sampling equipment and analysis capabilities for investigating the properties of the seabed and lake beds. The survey provides information about the suitability of the target site for construction, restoration and renovation, enabling the planning of optimal measures for each site.

Two GTK researchers on board the research vessel Geomari examining a sediment sample from the seabed.

Key benefits

Overall picture on structure of aquatic sediments

Sediment samples offer in-depth information about the geological properties of the seabed or lake bed and the conditions that prevailed when sediment was deposited.

Sediment data for managing dredging and dumping of material

Information related to sediments is essential for the management of dredging and dumped material. The statutory construction requirements call for an analysis of the sediment properties and the effects of the operations.

Most comprehensive service portfolio in Finland

GTK has Finland’s most extensive range of equipment and methods for sampling, measuring and analysing sediments. Our experts always select the sampling method that best suits the customer’s research needs.

Sediment research meets many needs

Geochemical and geophysical properties of sediments from the seabed or an inland watercourse can be studied to determine the quality of the material. Research data is needed for activities such as the planning of dredging and dumping operations, for determining background concentrations and for understanding the sediment deposition in the area. Furthermore, sediment carbon stock and sequestration can be determined based on the results.

Our service assists in the planning of environmentally optimal measures targeting sediments.

The surveys are carried out on sediment and pore water according to the customer’s needs. In the assessment of the environmental conditions at the seabed or lake bed, the current physical status of the sediment, pore water and the overlying water column are examined. The physical properties of the near-bottom water and the concentration and size distribution of suspended particles may also be determined.

The research equipment is also used to study processes such as erosion and deposition, and greenhouse gases.

Our experts always plan the surveys based on the suitability of the methods and the research needs.

Mineral and sediment management

Research data on sediments promotes the exploitation and overall management of limited extractive material and mineral resources.

Interaction between surface water and groundwater

Sediment research can be used to investigate the interaction between groundwater and surface waters (sea and lakes), as well as the impact of surface water on the quality and quantity of groundwater. Our research also provides information about the link between the status of surface waters and sediments.

A geologist at sea on the deck of a research vessel examining a seabed sediment sample.

In the Geomeasure project, seismo-acoustic surveys are carried out on GTK's research vessel Geomari.
NEWS

Research on the Seafloor’s Constructability Properties Supports the Design of Offshore Wind Power

In the future, the construction of offshore wind power will increase exponentially in Finland. The wind energy potential of the Baltic Sea area is 93 GW. In Finland, there is for now only one offshore wind farm, in Tahkoluoto, but there are 1,100 km of coastline, the second largest amount among Baltic Sea countries. The prerequisites for additional offshore wind power construction are therefore good.

Contact us

Leave your contact information and we will get back to you.

Contact our expert

Manager, Marine geology
+358295032275
Geologist
+358295032211

Current news and information about recent research results directly to your email. Subscribe to GTK newsletter.