Hurricane Effects on the Outer Banks

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Presentation transcript:

Hurricane Effects on the Outer Banks Landform Change of Hurricane Isabel on Hatteras Island North Carolina

The Outer Banks (OBX) Barrier islands stretching from Virginia to North Carolina and includes most of North Carolina’s coastline.

Hatteras Island Barrier island in Outer Banks Divides Atlantic Ocean & Pamlico Sound 85.56 squares miles 4,001 residents in 2000 census Known for sport fishing, surfing, windsurfing, kiteboarding Many resorts and vacation rentals

Climate Temperate Mild but windy winters Cooler than inland summers Prone to hurricanes

Hurricane Isabel Largest in 2003 season 51 total indirect deaths Widespread wind and storm surge damage NC landfall as Category 2 Hurricane $170 million NC damages

Hatteras Island washout (USGS)

Project Objectives Illustrate land cover changes on Hatteras Island before and after Isabel Multiple class changes Land to sea changes Explore why certain areas are more prone to damage Why was Hatteras Inlet made where it was?

Methodology Downloaded Landsat 5 imagery Unzip files Load and stack bands in Erdas

Unsupervised 11 classes

Image clip

Import into Idrisi

Reclass

Cross Classification

Boolean

Boolean Cross Classification

DEM

Cross Classification Table

Area

Boolean Cross Classification Table

Boolean Area

Discussion 317 hectares of land lost to erosion/flooding

Hatteras Inlet and Flooding

Questions Asked Why did washout happen? Why did it happen here? Why not further up or down shore? What made this section so vulnerable? Why did flooding occur where it did?

Conclusion Elevation and vegetation cover are very crucial factors Important to predict and prepare areas of high risk How will climate change and sea level rise influence? Understand today -> Understand the future

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