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A gully is a landform created by running water, mass movement, or commonly a combination of both eroding sharply into soil or other relatively erodible material, typically on a hillside or in river floodplains or terraces.
The Doña Ana County Flood Commission in the U.S. state of New Mexico defines an arroyo as "a watercourse that conducts an intermittent or ephemeral flow, providing primary drainage for an area of land of 40 acres (160,000 m 2) or larger; or a watercourse which would be expected to flow in excess of one hundred cubic feet per second as the result of a 100 year storm event."
Log dam in a gully, circa 1935, Missouri, US Log dam in Adawro river, Ethiopia. Check dams are made of a variety of materials. Because they are typically used as temporary structures, they are often made of cheap and accessible materials such as rocks, gravel, logs, hay bales, and sandbags.
Aridification is the process of a region becoming increasingly arid, or dry.It refers to long term change, [1] rather than seasonal variation. It is often measured as the reduction of average soil moisture content.
Arid regions of the Western United States as mapped in 1893. Aridity is the condition of geographical regions which make up approximately 43% of total global available land area, characterized by low annual precipitation, increased temperatures, and limited water availability.
Billabongs are usually formed when the path of a creek or river changes due to bank erosion, leaving the former channel deprived of further inflow and becoming a dead-end gully holding only residual water that has not yet drained or evaporated. As a result of the arid climate of many parts of Australia, these "dead rivers" often fill with water ...
The park contains ecologically restored desert and arid land vegetation. [1] [2] The park was created in 2006 to try and restore the natural ecology of a large, rocky area adjoining and below the fort. It was opened to the public in February 2011. The area in and around the park contains distinctive volcanic rock and sandstone formations. The ...
Gully erosion, previously less significant in Nigeria, has increased significantly, resulting in damage to agricultural lands. [62] Soil Salinization: In arid northern Nigeria, agricultural sustainability often relies on irrigation, which predisposes areas to saline soils and reduced crop productivity if not properly managed. [63] 4.