City of New Orleans Master Drainage Plan

Ardurra developed a master drainage analysis for three watersheds tributary to City Drainage Pump Stations 1 and 6, developing strategic improvement recommendations through advanced hydrologic and hydraulic modeling. The four-phase project utilized LIDAR data, GIS mapping, and historical rainfall records to create detailed surface water models identifying drainage deficiencies and prioritizing infrastructure improvements.

The systematic approach began with extensive data collection using surface drainage unit sheets and ground elevation data to establish baseline conditions. Advanced unsteady flow modeling systems enabled accurate watershed characterization and calibration to historical rainfall patterns, providing reliable foundation for improvement analysis.

Key Project Highlights:

• Developed comprehensive surface water models for three watersheds using LIDAR data and GIS mapping systems

• Calibrated modeling systems to watershed characteristics using historical rainfall data for accurate performance prediction

• Identified existing drainage deficiencies through detailed analysis flagging system limitations and overflow risks

• Evaluated alternative channel improvements with unit cost analysis for informed decision-making

• Created detailed overflow mapping showing existing conditions and proposed improvements with comparative water surface profiles

• Delivered preliminary design solutions for major culverts and canals with comprehensive cost analysis

• Prioritized project implementation sequence with strategic funding stream recommendations for plan execution

The master drainage report provided New Orleans with an actionable roadmap for systematic drainage improvements, including existing conditions analysis, proposed enhancement mapping, and cost-effective implementation strategies. The prioritized approach enables strategic infrastructure investment while addressing critical flooding vulnerabilities throughout the watershed areas.