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Methodology
Beach Erosion
All coastal states are experiencing erosion along at least some portions of their coastline.
However, coastal erosion is one aspect of natural coastal processes that can vary seasonally and in other ways. Erosion may not
pose any problems until it threatens coastal properties or diminishes the width
of recreational beaches. In the report we present erosion information that is
available from the states. It ranges from erosion rate maps to data found in
academic or engineering studies. We hope to make the public aware of areas in
their states that are eroding. One specific measure in this regard is the percent
of 'critically' eroding shoreline. By knowing the location of erosion hotspots and the magnitude of erosion
in these areas, measures such as oceanfront construction setbacks can be employed
to reduce risks to new development. Because it relates to this issue we have
included a summary of each state's erosion response and hazard avoidance policies within this section
of the report.
Other measures of the severity or impact of erosion are the number of people,
structures, or acres of land in identified erosion zones, but this information
is typically not readily available.
Threshold criteria for the beach erosion indicator are:
- 7 to 10 - Regular comprehensive statewide monitoring of shoreline change.
This information is presented in a manner that is easily understood by
a range of audiences, and it is easy to access.
- 4 to 6 - Some statewide monitoring of shoreline change or documentation
of factors affecting shoreline change. This information is presented
in a manner that is only understood by experts, and access to this information
is limited to state agencies and academic institutions.
- 1 to 3 - Little to no shoreline change information of value exists,
can be easily understood, or is readily available.
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