Hydrodynamics  ·  FLO-2D  ·  Flood depth & extent

2D Flood Modeling (FLO-2D)

Built a 2D hydrodynamic modeling workflow to simulate flood behavior and generate depth and extent outputs to support hazard interpretation and planning. This case study uses only public-domain, synthetic, or sanitized examples.

Flood modeling FLO-2D Hydrodynamics Depth & extent GIS outputs Python
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Overview

Highlights

What the model outputs were intended for and how the workflow is organized.

Objective

  • Simulate flood behavior and identify flow paths.
  • Generate flood depth and extent maps for planning.
  • Support interpretation with clear spatial outputs.

Approach

  • Prepare terrain, roughness, and boundary conditions.
  • Run 2D simulations and review stability and QC.
  • Post-process rasters and map final outputs.

Tools

  • FLO-2D for model setup and simulation.
  • GIS for terrain preparation and output mapping.
  • Python for automation and summary workflows.

My Role

  • Set up model inputs and configured parameters.
  • Executed simulation runs and performed QC checks.
  • Generated GIS-ready outputs and final maps.

Key Takeaways

  • Input quality — terrain and roughness — strongly drives output reliability.
  • Consistent QC steps reduce reruns and improve the defensibility of results.
  • Depth and extent maps communicate simulation results clearly to stakeholders.
Module 01

Model Setup

Prepare terrain, roughness, and boundary conditions to define a stable and physically representative simulation domain.

  • DEM processing and computational grid preparation.
  • Assign roughness and land-cover parameters to grid elements.
  • Define inflow and outflow boundaries and design event assumptions.
FLO-2D model setup: grid and terrain configuration interface
Module 02

Simulation & QC

Run the model across event scenarios and verify the stability and physical consistency of simulation outputs.

  • Execute scenarios across design events, durations, and sensitivity cases.
  • Check output stability and sanity — flood depth, velocity, and mass balance.
  • Iterate model settings to resolve numerical artifacts if needed.
FLO-2D simulation output: flood depth and velocity results review
Module 03

Post-processing & Outputs

Convert simulation results into GIS-ready products and decision-ready maps for reporting and downstream analysis.

  • Export flood depth and extent rasters and contour layers.
  • Compose final maps and summary figures for reporting packs.
  • Package outputs for downstream hazard exposure analysis.
Flood depth map output: post-processed GIS raster and extent layers

Data Privacy Note

This case study is generalized and displays only public, synthetic, or sanitized examples. No client-confidential information is included.

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