Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyWhich outcome occurs when wind exceeds threshold friction velocity parallel a vegetated dune field?
A)Dune crest erosion decreases sharply
B)Saltation-dominated sand transport increases✓
C)Surface creep becomes the dominant process
D)Vegetation cover rapidly regenerates inland
💡 Explanation
Increased wind beyond friction velocity initiates saltation, causing increased sand transport because particle lift occurs and then is propelled by the aerodynamic drag of the dune surface. Therefore, saltation-mediated sand transport is heightened, rather than crest stability, since vegetation offers less friction defense for faster winds.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Geography →- Which outcome occurs when rapid tectonic uplift intersects an established alluvial plain?
- Which outcome follows increased precipitation on granite bedrock?
- Which mechanism creates crevasse splays when floodwater overtops a natural levee along a river?
- Which long-term outcome occurs from a dam blocking sediment transport?
- Which feedback loop occurs when glaciers melt near volcanically active regions?
- Which phenomenon causes poleward heat redistribution from the tropics through atmospheric cells?
