CSDMS 2022: Environmental Extremes and Earthscape Evolution

Simulating linkages between landscape evolution and coastal real estate markets with the CoAStal Community-lAnDscape Evolution (CASCADE) model

Katherine Anarde

North Carolina State University, United States
Zachary Williams -- United States
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Eric Hutton CSDMS United States
Dylan McNamara -- United States
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Laura Moore University of North Carolina at Chapel Hill United States
Brad Murray Duke University United States
Marty Smith -- United States
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Developed barriers are tightly-coupled systems driven by feedbacks between natural processes and human decisions to maintain development. Coastal property markets are dynamically linked to the physical environment: large tax revenues and high-value infrastructure necessitate defensive coastal management through beach nourishment, dune development, overwash removal, and construction of hard structures. In turn, changes to environmental characteristics such as proximity to the beach, beach width, and the height of dunes influence coastal property values. In this talk I will use a new exploratory model framework – the CoAStal Community-lAnDscape Evolution (CASCADE) model – to explore the coupled evolution of coastal real estate markets and barrier landscapes. The framework couples two geomorphic models of barrier evolution (Barrier3D and BRIE) with an agent-based real estate model – the Coastal Home Ownership Model (CHOM). CHOM receives information about the coastal environment and acts on that information to cause change to the environment, including decisions about beach nourishment and dune construction and maintenance. Through this coupled model framework, I will show how the effects of dune and beach management strategies employed in the wake of extreme storms cascade through decades to alter the evolution of barriers, inadvertently inhibiting their resilience to sea level rise and storms, and ultimately unraveling coastal real estate markets.

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Of interest for:
  • Terrestrial Working Group
  • Coastal Working Group