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SAR Flood Extent Mapping

Sample project

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Sample cover: flood extent

Sentinel-1 SAR Change Detection SNAP QGIS

Overview

Sample description: detect flood water from radar imagery, which sees through cloud, by comparing pre-flood and flood-time scenes.

Study Area: [River basin or district]
Duration: [Start – End]
Role: [Solo project / Team]
Status: Sample

Methods & Tools

Processing Steps

  1. Download pre-flood and flood-time Sentinel-1 scenes.
  2. Apply orbit correction, calibration, speckle filtering and terrain correction.
  3. Threshold backscatter change to extract open water.
  4. Clean the mask and compute flooded area per administrative unit.

Tools Used

  • SNAP — SAR pre-processing
  • QGIS — mask clean-up and mapping

Key Findings

  • [Finding one — add a number or metric]
  • [Finding two]
  • [Finding three]

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