InTeGrate Modules and Courses >Coastal Processes, Hazards and Society > Student Materials > Module 3: Coastal Systems: Landscapes and Processes > Barrier Islands > Mixed-Energy Barriers
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These materials are part of a collection of classroom-tested modules and courses developed by InTeGrate. The materials engage students in understanding the earth system as it intertwines with key societal issues. The collection is freely available and ready to be adapted by undergraduate educators across a range of courses including: general education or majors courses in Earth-focused disciplines such as geoscience or environmental science, social science, engineering, and other sciences, as well as courses for interdisciplinary programs.
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Initial Publication Date: December 7, 2016
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Mixed-Energy Barriers

Mixed energy barrier island systems are typically short and wider at one end than the other end. Historically, this type of morphology has been referred to as a drumstick barrier island because of its approximate similarity in shape to the drumstick of chicken leg. The tidal inlets between these barriers are large because of the relatively higher tidal energy. Compared to wave dominated barriers, they also have large ebb tidal deltas because the strength of the tidal currents are able to transport sediment seaward in a regime of relatively low wave energy. The relatively wider end of the island is the result of the accretion of sediment that as waves refract around the edge of the ebb tidal delta, causing a localized reversal in the longshore transport pattern and leads to sand accumulation (Figure 3.25).

These materials are part of a collection of classroom-tested modules and courses developed by InTeGrate. The materials engage students in understanding the earth system as it intertwines with key societal issues. The collection is freely available and ready to be adapted by undergraduate educators across a range of courses including: general education or majors courses in Earth-focused disciplines such as geoscience or environmental science, social science, engineering, and other sciences, as well as courses for interdisciplinary programs.
Explore the Collection »