Technical Integrity / Collaboration / Exceptional Results

Sediment Assessment

Integral has extensive experience in the design and implementation of field, analysis, and modeling studies to solve sediment and contaminant transport problems. Using state-of-the-science instrumentation, we characterize system-wide transport at complex aquatic sites worldwide. Our fixed and mobile laboratories support precise, accurate assessments of sediment erosion rates. We combine these measurements with innovative analysis and modeling techniques to characterize sediment and contaminant fate and transport and support informed decision making.

SEDflume StudiesSEDflume Studies

SEDflume is a powerful tool that directly measures sediment erosion properties, providing critical information on site-specific sediment transport. Sediment cores are analyzed in our laboratory in Santa Cruz, California, or in our mobile SEDflume laboratory. Applications include studies of sediment erodibility and scour effects, evaluations of dredge material stability, and analysis of the effectiveness of capping material.

Sediment LaboratoriesSediment Laboratories

Integral’s resources include a sediment laboratory and mobile SEDflume laboratory, which support unique erosion testing. These laboratories also include facilities for laser diffraction particle sizing, water content determination, bulk density, and loss-on-ignition analysis, as well as the capability for customized sediment consolidation and settling studies.

Sediment Profile ImagingSediment Profile Imaging

Integral offers more than 25 years of experience in the use and application of an innovative sediment profile imaging (SPI) tool for rapidly mapping large areas of the sediment bed. Using SPI, we support interpretation of sediment quality, benthic conditions, and transport and fate processes at complex, dynamic sediment sites with multiple contaminant sources.

Bottom Boundary Layer StudiesBottom Boundary Layer Studies

Integral staff developed and implemented a state-of-the-science acoustical and optical field instrumentation system that can be used to quantify in situ near-bed shear stress and sediment properties such as settling velocity, size distribution, and composition at temporal scales appropriate for sediment transport investigations.

Sediment FluxSediment Flux

Quantification of sediment flux is essential for most fate and transport studies. Integral uses in-house acoustic Doppler current profilers to quantify water-column sediment concentrations and flow rates and innovative data analysis methods to characterize sediment plume dynamics and system-wide sediment mass balance in riverine, lacustrine, estuarine, coastal, and oceanic environments.

Contaminant Fate and TransportContaminant Fate and Transport

Understanding the mechanisms responsible for variability in concentrations of chemicals of potential concern (COPCs) is essential for evaluating COPC exposure pathways and supporting risk analysis. Integral’s in-house tools include advanced optical sensors and models for deriving biogeochemical constituents such as hydrophobic COPCs from in situ optical measurements to support contaminant fate and transport investigations.

Dredge Plume ModelingDredge Plume Modeling

Integral scientists offer expertise in the sensing of benthic conditions and suspended sediment in the water column via acoustical and optical means, which allows for 3-D mapping and characterization of dredge plumes and residual sediments from dredge operations. We apply numerical modeling techniques combining waves, currents, and sediment transport and morphology to further investigate dredge spoil disposal areas, channel in-filling rates, dredge plumes, and coastal impacts associated with dredging activities.