Which outcome accelerates coastline erosion when groynes trap sediment?

💡 Explanation

Downcoast sediment starvation accelerates erosion because refraction focuses wave energy on sediment-depleted areas. Longshore drift is interrupted by the constructed barrier, impacting down coast regions; therefore, erosion increases downcoast of the groynes, rather than stabilizes or diffuses the energy.

• Which outcome occurs downstream of a glacial dam when rapid drainage begins?
• Which process drives the formation of horst and graben structures along a normal fault?
• Which landform immediately results from subsurface carbonate dissolution?
• Which risk increases when sediment supply halts offshore breakwaters?
• Which outcome results when continuous sediment deposition narrows a river's channel exit into a lake?
• Which mechanism accelerates coastal headland erosion where wave energy converges?