Sediment profile imaging, or SPI, is a survey method that rapidly maps large areas of the seafloor, rivers, or lake beds and provides in situ information on sediment textures and deposits, geochemical conditions, biological features, animal–sediment interactions, natural disturbance factors, and human impacts. Integral provides full service SPI/plan view camera surveys from planning through data collection, image analysis, and technical reporting. This innovative technology can be used in sediment quality and benthic habitat assessments, remedial investigations, long-term monitoring programs, and offshore oil and gas impact assessments, as well as to complement other seabed mapping tools. To streamline the analysis and reporting of SPI/plan view survey results, Integral has developed an image analysis framework that allows key imaged features to be rapidly measured, mapped, and interpreted. Integral can provide an SPI/plan view survey technical report within 30 to 60 days of the data collection, allowing other project questions to be addressed in an informed way.
An SPI camera system can obtain hundreds of high-resolution images of the sediment surface (22 cm high x 15 cm wide) in a single day. For example, the image on left shows a relative healthy benthic habitat with subsurface feeding pockets indicative of head-down deposit feeders. A shrimp is shown at the sediment surface (top left).
Automated Computer Image Analysis
Integral has developed an in-house SPI and plan view image analysis platform that automates or semi-automates the measurement and analysis of many key imaged parameters, such as the camera penetration depth, boundary roughness, apparent redox potential discontinuity depth, and the thickness of depositional layers. This allows for the rapid evaluation and reporting of survey results, often within 4 to 8 weeks of field survey completion.
This image shows methane-gas-filled voids in the sediment column, which indicates high sediment oxygen demand and excess organic loading.