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<br />
<br />"Shoreline erosion is a key variable in managing coastal hazards, particularly
<br />in places like Wrightsville Beach where conditions change regularly The
<br />mapping project provides us with a set of tools to do a number of things -
<br />determine beach and dune volumes in specific areas, identify areas where
<br />beach nourishment is needed, administer the setback requirements under
<br />CAMA, and identify unbuildable areas for acquisition, The project also had
<br />an important relation-building component - it couldn't have been carried out
<br />without the support of HMGP funds and the Division of Emergency Manage-
<br />ment."
<br />
<br />- Patricia Hughes, Strategic Planning Coordinator,
<br />Division of Coastal Management, March 24, 1999
<br />
<br />Mitigation Success: Adapting Technology to Reduce
<br />Flood Losses in Charlotte-Mecklenburg County
<br />
<br />Three types of nood problems occur in Charlotte-Mecklenburg COUnty:"
<br />
<br />overbank flooding that
<br />affects about] ,500 Slruc-
<br />tures, most built before
<br />adopting floodplain manage,
<br />ment regulations;
<br />
<br />local drainage problems in
<br />up to 10,000 locations; and
<br />
<br />. erosion and channel degra-
<br />dation along urban stream reaches.
<br />
<br />
<br />Charged with improving floodplain management, the Charlotte-Mecklenburg Storm
<br />Water Services (CMSWS) turned to a new form of data collection technology,
<br />Global Positioning System (GPS) units are used by engineers and field technicians
<br />to gather field data, which can be processed and displayed using GIS technology,
<br />
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<br />]n August 1996, Field personnel began surveying approximately 2,000 homes and
<br />businesses in nood-prone areas, By using GPS, crews were able to quickly deter-
<br />mine both the location and first floor elevations, GPS involves a small receiver
<br />affixed to a portable backpack unit. Signals from several satellites are digitally read
<br />and processed by hand-held computers
<br />into geo-referenced data about location
<br />and elevation, GPS can yield elevations
<br />that are accurate to within a few inches,
<br />which is sufficient for floodplain manage-
<br />ment purposes,
<br />
<br />
<br />Application of Geographic Information
<br />Systems, All data collected by GPS are
<br />important inputs to GIS-based models,
<br />CMSWS uses the information to assess
<br />nood risk, to guide the mitigation plan-
<br />ning process, and to manage daily opera,
<br />
<br />GIS can show proximity oj structures to the floodplam,
<br />
<br />---.-
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