Which geological phenomenon arises when river levees are breached?

💡 Explanation

A levee breach causes a crevasse splay because sediment-laden water rapidly flows through the break, depositing sediment on the floodplain; therefore, crevasse splays are created because of the failure rather than stable levee/channel conditions.

• Which hazard increases when acidic groundwater dissolves carbonate bedrock?
• Which hazard increases where tectonic uplift causes braided stream deposition into large alluvial fans?
• Which mechanism drives the thermohaline circulation of ocean water when surface water cools significantly in polar regions?
• Which outcome occurs when glacial melt intensifies near Greenland?
• Which outcome primarily occurs when excessive groundwater extraction lowers the water table beneath natural levees?
• Which risk increases when rapid urbanization constricts a river channel with natural levees?