Services Rendered:

Environmental Impact Statement

EFDC Hydrodynamic Model

Nested Models

Coastal Engineering

Circulation Modeling

Environmental Impacts

ADCP Data Processing

ADCP Data vs. Model Comparisons

The Kodiak Airport (ADQ) is currently in the process of conducting a Runway Safety Area Improvement Alternatives Study. As part of that process an Environmental Impact Statement (EIS) is required to be conducted. The study determined the existing coastal circulation patterns and evaluated the changes and impacts due to the runway extension alternatives. The results of this assessment were incorporated into the Final EIS. Two EFDC hydrodynamic models were generated. A larger scale model was developed using data from four ADCP’s that collected data for a 32 day period. The model was calibrated to stage and velocities from the ADCPs. Once the larger scale model was calibrated, a fine scale model for the region around the airport was developed for the detailed assessment of the near shore currents. Impacts of flows and bed shear stresses were compared between the various runway extension alternatives. The following figure shows the larger scale coastal model location map for the Kodiak Airport and nearby regions: