Riverine Hydrology and Hydraulics analysis under the FEMA Map Modernization Program for revision of Flood Insurance Studies (FIS) and the flood plain mapping for several communities in New York State, including Cayuga, Dutchess, Greene, and Schoharie Counties. Prepared initial assessments of flood hazard areas, and prepared project layouts for several other New York communities in Clinton, Essex, and Delaware Counties.
- Standard hydrological techniques in combination with GIS / spatial analysis techniques for watershed delineation, and peak discharge-frequency relationships for selected risk levels. Nominated peak discharge for 10, 50, 100, and 500 year flood events using gage analysis, regional regression equations, runoff modeling, and other methods.
- HEC-RAS computer modeling for riverine studies to determine water surface elevations and to produce encroachment stations for regulatory floodways. Used customized GIS tools to prepare geometric and hydraulic input-data sets for HEC-RAS. Data used to prepare the HEC-RAS input included Digital Elevation Models (DEMs) produced using LiDAR and conventional survey, remotely sensed land cover data, aerial photography, and other GIS data sets.
- Produced DFIRM map elements using GIS techniques from HEC-RAS output to corresponding GIS data DEMs. Map elements included Base Flood Elevation (BFE) lines, labeled cross section lines, 100-Year and 500-Year Flood Extents, and Floodway boundaries. Coordinated with DEC cartographic staff for the completion of map products.
- Prepared required reports for FIS mapping projects including the Hydrology and Hydraulics reports, the FIS document, and the Technical Data Support Notebooks (TSDN)