HCFCD Modeling, Assessment, and Awareness Project (MAAPnext)
Innovative Flood Modeling Redefines Risk Maps Across Harris County Watersheds
Project Facts
| Location | Harris County, Texas |
| Owner | Harris County Flood Control District |
| Status | Completed 2024 |
Overview
MAAPnext is a groundbreaking initiative redefining flood risk in Harris County through advanced modeling techniques and the latest NOAA rainfall data. Using FEMA-approved methods, the project delivers innovative floodplain maps and risk assessment tools for all 22 county watersheds.
Services
Challenges
Outdated Risk Data
Harris County’s existing floodplain maps and risk tools were based on older rainfall and flood data, limiting their reliability in planning, permitting, and emergency management decisions.
Growing Urban Development
FEMA granted approval for MAAPnext to use new 1D/2D modeling techniques, including a novel way to compute and map floodways—setting a potential precedent for national flood risk analysis.
Consistency and Scalability
With 22 distinct watersheds, ensuring modeling consistency, technical rigor, and scalability of results across the region presented a significant challenge.
Solutions
Advanced Modeling Techniques
Walter P Moore applied the latest NOAA Atlas 14 rainfall data and state-of-the-art hydrologic and hydraulic models to assess more than 160 miles of streams across Buffalo Bayou, Barker Reservoir, and Armand Bayou.
Floodway Mapping Approach
The team implemented a cutting-edge 1D/2D modeling process for floodway delineation—setting a potential new standard for national floodplain mapping practices.
Expert Advisory Role
As part of the Project Management Team, Walter P Moore contributed technical guidance, ensuring the project’s methodology, data integration, and risk mapping were consistent across all watersheds.
Multi-Agency Coordination
Close coordination with local and federal partners—including FEMA and Harris County Flood Control District—ensured alignment with regulatory requirements and enhanced the project’s applicability for both public and private stakeholders.
Results
Actionable Floodplain Maps
The project produced FEMA Risk MAP-compliant floodplain maps that empower property owners, public agencies, and developers to make informed, risk-aware decisions.
Improved Planning & Response
Improved flood risk data enables better infrastructure investment, zoning, and emergency response strategies, reducing potential damage from future flood events.
Scalable, National Model
MAAPnext sets a replicable standard for large-scale floodplain assessment projects, offering a roadmap for other regions facing similar challenges due to climate change and urban growth.
Increased Public Awareness
By providing clear, accessible risk data, the project helps educate communities, enhance insurance assessments, and foster long-term regional resilience.
