Скачать или смотреть Introduction to Normalized Difference Water Index (NDWI)

The Normalized Difference Water Index (NDWI) is a remote sensing technique used to assess water content in various surfaces, primarily focusing on vegetation and water bodies. Developed by McFeeters in 1996, NDWI utilizes the spectral reflectance properties of water and vegetation to differentiate between them effectively. The index is calculated using the formula:

NDWI = (Green – NIR)/(Green + NIR)
where NIR represents near-infrared reflectance. Positive NDWI values typically indicate the presence of water, while negative values suggest dry land or vegetation.

NDWI is particularly useful in monitoring water bodies, assessing drought conditions, and analyzing changes in land use. It enhances the visibility of water features in satellite imagery, making it easier for researchers and environmental managers to track water resources over time. The index can be applied in various fields, including hydrology, agriculture, and environmental management, providing critical insights into water availability and distribution. By employing NDWI, stakeholders can make informed decisions regarding water conservation and resource management, especially in regions facing water scarcity. Its simplicity and effectiveness make NDWI a valuable tool for remote sensing applications globally. This video is I\an introduction to Normalized Difference Water Index


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