Analysis of multi-temporal satellite images from 1980 to 2019, complemented by geomorphic mapping and field study, indicate that “loose sand” extraction of Sakarya River deposits from the Adapazarı Plain of NW Turkey significantly intensified during the last decade, and mining operations have caused complete and irreversible alteration of floodplain habitat in a total area amounting to ~970 hectares. Our reconstructions estimate the total amount of mined material over a 40-year period since 1980 as ~50 million m3 , amounting to ~80 million tonnes of fluvial sand...