Type of Presentation

Poster

Session Title

Remote sensing technology to monitor the short and long term dynamic of the Salish Sea

Description

The structural pattern and benthic ecology of the coastal seafloor of the Strait of Juan de Fuca along the Olympic Peninsula Coast is punctuated by prominent bedforms resulting from a complex tectonic history and glaciation, and currently is affected by coastal sedimentation, along with ongoing oceanographic processes. With the objective of characterizing these observed bedforms, and to quantify the complexity in their relative spatial pattern, high-resolution multibeam sonar data were acquired on November 15th 2016 along the Olympic Coast of the Strait of Juan de Fuca, adjacent to the Elwha River delta. The data was acquired with a Simrad EM302 multibeam sonar and post-processed in CARIS HIPS and SIPS to create a surface using a two-meter resolution. It was then imported into the ArcGIS software suite for the generation of spatial pattern metrics of individual and grouped seafloor features. The analysis identified three distinct bedforms, with very similar length, width, and height ratios, in a general north-south orientation. Additional surface roughness metrics characterized variation between the slope, aspect, and relative orientation of the bedforms. These data illustrates the fine scale variation in geomorphic processes which are active in this region, and provides a baseline for long-term change analysis of the coastal seafloor in the Strait of Juan de Fuca.

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Pattern Analysis of Coastal Bedform Morphology in the Strait of Juan de Fuca

2016SSEC

The structural pattern and benthic ecology of the coastal seafloor of the Strait of Juan de Fuca along the Olympic Peninsula Coast is punctuated by prominent bedforms resulting from a complex tectonic history and glaciation, and currently is affected by coastal sedimentation, along with ongoing oceanographic processes. With the objective of characterizing these observed bedforms, and to quantify the complexity in their relative spatial pattern, high-resolution multibeam sonar data were acquired on November 15th 2016 along the Olympic Coast of the Strait of Juan de Fuca, adjacent to the Elwha River delta. The data was acquired with a Simrad EM302 multibeam sonar and post-processed in CARIS HIPS and SIPS to create a surface using a two-meter resolution. It was then imported into the ArcGIS software suite for the generation of spatial pattern metrics of individual and grouped seafloor features. The analysis identified three distinct bedforms, with very similar length, width, and height ratios, in a general north-south orientation. Additional surface roughness metrics characterized variation between the slope, aspect, and relative orientation of the bedforms. These data illustrates the fine scale variation in geomorphic processes which are active in this region, and provides a baseline for long-term change analysis of the coastal seafloor in the Strait of Juan de Fuca.