Which outcome typically occurs when ephemeral stream systems encounter an abrupt decrease in gradient?

💡 Explanation

Alluvial fans are common results of sudden gradient decreases because deposition occurs due to decreased water flow competence. Therefore, sediments accumulate, rather than forming terraces or incised meanders which require sustained flow over time.

• Which effect increases phytoplankton concentration when coastal upwelling occurs?
• Which effect results when trade winds approach the equator in a Walker circulation cell?
• Which outcome results due to increased soil acidity inhibiting pedogenesis?
• Which landscape response occurs when fractured limestone bedrock experiences enhanced groundwater infiltration?
• Which directional pattern is induced in trade winds by the Coriolis effect?
• Which glacial outcome is intensified with freeze-thaw cycles?