Role
Analyst
Affiliation
GEOG 3xx — Hydrology GIS
Date
2024
Tools
ArcGIS ProSpatial Analyst
Research question
Which structures sit within modeled flood-prone zones, and which sub-watersheds drain to them?
Objective
Delineate watersheds from terrain and intersect flood zones with the building footprint layer.
Methodology / Workflow
- 1
Filled the DEM and computed flow direction and accumulation.
- 2
Delineated watersheds and stream networks.
- 3
Intersected flood zones with footprints to count exposed structures.
Maps & results
Click any map to enlarge
Findings
Exposure concentrates in two low-lying sub-watersheds.
A small share of structures accounts for most of the high-hazard exposure.