👉 A donary is a term used in the field of hydrology and water management to describe an area that has been subjected to significant erosion or loss of surface water. In other words, it refers to an area where water levels have declined significantly due to factors such as land subsidence, coastal erosion, or changes in precipitation patterns. Donaries are often associated with areas where the riverbeds have eroded away, and they can be a source of concern for hydrologists and environmental scientists who