What is surface depression?

Surface depression refers to a localized area on the Earth's surface that is lower in elevation compared to its surrounding terrain. This phenomenon can occur due to various natural processes, such as erosion, subsidence, or the collapse of underground cavities. Surface depressions can take the form of sinkholes, basins, or valleys, and they can impact local ecosystems and land use. In some cases, they may also influence hydrology by affecting water drainage and accumulation.