A flood study evaluates flood conditions in a defined area using hydrologic, hydraulic, topographic, and related information.
Definition
A flood study may support planning, mapping, permitting, or design. A firm’s scope can include data collection and review, hydrologic analysis, hydraulic modeling, mapping, alternatives evaluation, and technical documentation. What is included depends on the study purpose, geographic limits, available data, required scenarios, and reviewing authority. Firms may price modeling, field survey, agency coordination, and revisions as separate tasks, so the basis and review assumptions should be stated. Study results apply to the data, methods, and scenarios analyzed. They do not guarantee protection from every flood or establish conditions outside the study area. A flood study is also not the same as a floodplain map, though it may inform mapping. Owners can use the scope to make data needs, deliverables, and review steps visible. Federal flood hazard mapping information is maintained by FEMA.
How owners use it
- Define study boundaries, scenarios, source data, review steps, and deliverables in the project scope.
- Track assumptions and data gaps that could affect modeling effort or agency review.
- Example: 5 hours of data review + 18 hours of modeling + 7 hours of documentation = 30 planned study hours.
- Use study status and review milestones when monitoring project schedule and budget.
