water
4 articlesMonitoring Water Surface Changes with NDWI and MNDWI Time Series
NDWI and MNDWI time series from Sentinel-2 track changes in open water extent, reservoir levels, and flood dynamics. Learn how to set up water body monitoring, interpret seasonal patterns, and detect anomalies like drought drawdown or sudden flooding.
2026-04-01 · 7 min read
Tracking Groundwater Depletion from Space: The GRACE Gravity Mission
How GRACE and GRACE-FO satellites measure changes in Earth's gravity field to detect groundwater depletion at regional scales. Covers the physics, major findings, and implications for water security.
2025-10-14 · 9 min read
Estimating Evapotranspiration from Satellites: The Invisible Water Flux
How satellite data estimates evapotranspiration — the combined water loss from soil evaporation and plant transpiration. Covers energy balance methods, vegetation index approaches, and applications in irrigation management and water budgets.
2025-10-09 · 9 min read
MNDWI and NDWI Explained: Mapping Water Bodies from Space
What is MNDWI? MNDWI = (Green - SWIR) / (Green + SWIR) separates water from built-up land better than NDWI. This guide covers both water indices — formulas, Sentinel-2 bands, and when to use each.
2025-06-09 · 7 min read