Hawaii Engineering Group conducted a hydrology and hydraulics (H&H) study for the State of Hawaii – Department of Hawaiian Home Lands to evaluate flooding risks and drainage behavior along dry stream channels on Molokai, supporting safer land-use and long-term development planning.
Client: State of Hawaii – Department of Hawaiian Home Lands (DHHL)
Service: Hydrology and hydraulics study, flood modeling, and drainage analysis
This project involved a comprehensive hydrology and hydraulics (H&H) study of dry stream channels on Molokai, where frequent localized flooding and poorly defined drainage patterns posed risks to nearby homestead properties and future Department of Hawaiian Home Lands (DHHL) developments.
Hawaii Engineering Group analyzed existing watershed conditions to better understand drainage behavior, flow paths, and channel capacities under various storm scenarios. The study utilized industry-standard tools including HEC-RAS hydraulic modeling and GIS-based terrain and elevation data to simulate runoff and identify areas vulnerable to overtopping and flooding.
The resulting analysis produced clear, data-driven flood maps and modeling outputs that enabled DHHL to visualize flood-prone areas and assess potential impacts on surrounding land. These findings now serve as a technical foundation for informed flood mitigation strategies, infrastructure planning, and responsible land-use decisions, helping improve long-term safety and resiliency for Molokai communities.