The Nigeria gully erosion crisis has been ongoing since before 1980, and affects communities large and small. It is an ecological, environmental, economic, and humanitarian disaster.
Caused by surface runoff, the erosion occurs, notably, in gullies, which grow wider and deeper with each rainfall. Many of the gullies have become ravines, which can be dozens or hundreds of feet deep. Homes and structures routinely collapse, as the gullies expand with each rainy season. Unchecked, the phenomenon will eventually transform the region into a badland.
Though concentrated in several towns and states in the eastern part of the country, the crisis affects all Nigerians indirectly.
References
Nigeria gully erosion crisis Wikipedia(Text) CC BY-SA