The Normalized Difference Water Index (NDWI) is used to highlight open water features in a satellite image, allowing a water body to “stand out” against the soil and vegetation.

Kericho County NDWI map is an interactive digital map of Kericho County, Kenya. It provides a comprehensive overview of the water resources in the county, including water bodies, their drainage networks, and their availability. 

The map is divided into five zoom levels, with each level providing a detailed view of the water resources in the county. It contains a variety of information such as the water bodies, catchment areas, land use and land cover, and water availability. 

NDWI was calculated using the ArcMap tool Raster calculator.

To calculate Landsat 8 NDWI bands 3 ( Green , )  and band 5 ( Near Infrared, NIR )  are used

                         NDWI = (Green – NIR)/(Green + NIR)

                           or 

                        NDWI = (Band 3 – Band 5)/(Band 3 + Band 5)

This is an invaluable tool for local governments, researchers, and water resources experts in understanding and managing the water resources in the county.