GIStract

🌊 GIStract Hydrology & Flash Flood Screening System

GIStract Hydrology & Flash Flood Screening System


Free GIS-based Flash Flood Screening tool for runoff estimation, peak flow Qp, land-cover analysis, and flood risk assessment using DEM and SCS-CN.

Flash Flood Risk Analysis

✔ Free Hydrological Report & Map Export


Analysis Settings
Default design rainfall is 50 mm
Leave empty to use automatic CN calculation based on land cover.
Ready. Search location, draw polygon, then run analysis.

Result

🔹 3-Step Hydrology & Flash Flood Workflow

1. Search or Zoom to Your Area

Locate your study area anywhere using the interactive GIS map.

2. Draw the Analysis Boundary

Define the target area using polygon or rectangle tools.

3. Run Hydrological Screening

Generate runoff estimation, land-cover analysis, peak flow (Qp), and preliminary flash flood screening instantly.

Flash Flood Screening Tool

🔹Key Features

✔ High-Resolution DEM Terrain & Watershed Analysis
✔ Automated ESA WorldCover Land Use / Land Cover Classification
✔ GIS-Based SCS-CN Runoff & Hydrological Modeling
✔ Peak Flow (Qp) Estimation for Flash Flood Assessment
✔ Flash Flood Risk Screening & Watershed Evaluation
✔ Interactive GIS Mapping with DEM-Derived Terrain Analysis
✔ Free Hydrological Report & Flood Risk Map Export