Understanding Rates of Shoreline Change – A guide for Alaskans
Monday, November 16, 2015
9:30 a.m. - 9:30 a.m. AKST
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Rates of shoreline change (e.g."1 foot per year of retreat") are frequently used to describe the severity of erosion and these calculations are central to informed planning in coastal or riverine communities; however, not all rates of shoreline change are created equal and local planners need to understand what these numbers mean if they are to be used in decision-making. The Alaska Division of Geological & Geophysical Surveys (DGGS) has created a written guide to help people from a range of backgrounds understand how a shoreline position is defined, how a rate of shoreline change is affected by the availability of data and type of calculation that is used, and how rates are presented in a new interactive map tool (available online from DGGS, funded by CIAP). The session will introduce people to this guide with real world examples that help to define terms, explain some of the uses and limitations of projected shoreline positions in Alaska, and make recommendations for collecting and improving calculations of this type. Reference materials will be provided to all attendees.