The Normalized Difference Water Index (NDWI) is a satellite-derived indicator used to measure the presence and quality of water in a given area. In this map below, NDWI values are specifically calculated for water within defined sections of the river, making it a powerful tool for assessing water quality and detecting pollution levels.

How to Interpret NDWI Values:

• NDWI > 0.3: Indicates clean, open water with minimal pollution.
• NDWI between 0 and 0.3: Suggests potentially polluted or shallow water. This range may also represent a mix of water and vegetation.
• NDWI < 0: Signifies low water content, often associated with heavily polluted or degraded water quality.

Visualization on the Map:

• Sections of the river are highlighted with yellow boxes to represent individual monitoring grids.
• Lower NDWI values indicate poorer water quality or higher pollution levels in a specific section of the river.

By clicking on a grid (yellow box indicating a river section), you can explore detailed historical trends of NDWI values. These insights help identify pollution hotspots, prioritize areas for intervention, and support decision-making for river health and environmental conservation.