Lake Chad, Drought and Food Security: What Satellites Reveal

According to the FAO, Lake Chad shrank by about 90%, from roughly 25,000 km² in 1963 to less than 1,500 km² in 2001. FAO also reported a sharp fall in fish production and degraded pasture. For the millions who depend on the basin across Nigeria, Niger, Chad and Cameroon, water stress interacts with insecurity, displacement and food insecurity.

Why monitoring matters now The lake's extent varies a lot between seasons and years. Decision-makers need current information on where water, pasture and crops are available, not decades-old averages.

What satellites can track - Surface water extent month by month, using Sentinel-1 radar and optical imagery. - Vegetation and pasture condition with NDVI and Earth-embedding change signals. - Rainfall anomalies from CHIRPS and other datasets. - Cropland change around the lake shore and irrigated areas.

Turning data into early action 1. Define drought triggers combining rainfall deficit and vegetation stress. 2. Link triggers to pre-agreed actions such as cash transfers, fodder supply and water trucking. 3. Map grazing corridors and water points to reduce farmer-herder conflict. 4. Report impact transparently to donors with geotagged evidence.

StrikeClimate provides basin-scale drought-stress dashboards for humanitarian agencies, state governments and development partners.