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Simulation of Coastal Storm Surge and Rainfall Flooding Scenarios at Camp Lejeune with GSSHA

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Technical Report

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ERDC Vicksburg United States

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This Coastal and Hydraulics Engineering Technical Note CHETN describes the development of a computer model to examine flooding scenarios with pre-defined storm surge and extreme rainfall due to tropical systems, using the Gridded Surface Subsurface Hydrologic Analysis GSSHA numerical modeling system Downer et al. 2005. This model serves as a platform for future deployment of GSSHA models on large basins in this type of setting with enhanced Military Hydrologic Simulator capabilities. BACKGROUND The military faces multiple environmental hazards around the world. Simulations of various environmental conditions can be used to help troops understand, assess, and prepare for potential hazards. Hydrologic simulations can be used to assess water-related hazards, such as flooding, high currents, erosion, and drought. Recognition of this need has led to the development of the Military Hydrologic Simulator software tool. The Military Hydrologic Simulator is being developed as an interface to facilitate data input, model runs, and simulation output visualizations for large spatial scales. The performance of the long-term simulation capabilities in this study will help the Hydrologic Simulator to manage large temporal scales, and in operational mode, to inform flood hazards. The Camp Lejeune GSSHA watershed model discussed in this document is the first in a series of pre-defined scenarios that provide a computational test bed for the Military Hydrologic Simulator. For the purposes of defining hazards, seven different broad operating environments were identified coastal, riverine, tropical, high mountain, high plains, arid upland, and humid upland. Broadly speaking, Camp Lejeune is in a coastal region and represents environmental hazards found in coastal areas.

Subject Categories:

  • Hydrology, Limnology and Potamology

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