soil resources (Fach) / erosion mechanisms and badland formation (Lektion)
In dieser Lektion befinden sich 10 Karteikarten
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Diese Lektion wurde von tinalinea92 erstellt.
- def erosion transport of soil particles along the soil surface dependin on tranport medium either fluvial erosion or aeolian erosion
- fluvial erosion rainfall and surface runoff rivers and streams floods
- aeolian erosion geomorphical force in arid and semi arid regions deflation abrasion
- erosion by human activities intensive agricultre deforestation roads and urbanization
- which flow energy vertical erosion and lateral erosion resistance of the materia is crucial factor variation of different particles
- Hjulström curve shows a rivers speed- affects to erode particles of different sizes 1. critical erosion speed - > minimum speed to transport and erode particles 2. mean setting velocity -> minimum speed needed to deposit particles
- badland formation arid regions source of sediment for dryland rivers gullysystems by wind and water erosion gullly landscape with high drainage desities are called badlands manifestation of desertificaion
- badland characteristica loess smectite-rich and mudstones vulcanic ash sandy conglomerates with clay and weakly cmented sandstones
- badland characterisitis important dry terrain soft sediment rocks and clay rich soils eroded by wind and water minimal vegetation and steep slopes - steile abhänge lack of regolith layer -> covering solid rocks canyons and ullied are common in badlands
- how to prevent erosion crop rotation vegetation terracing and windbeaks rows of trees and shrubs