Which risk increases when an artificial levee is constructed on an active alluvial fan?

💡 Explanation

When a levee confines flow on an alluvial fan, floodwaters can divert unpredictably if the levee fails, because the fan's braided channel system naturally distributes flow outwards. Therefore flash flood diversion results, rather than deposition, recharge reduction, or induced seismicity which require compressive mechanisms or tectonic influence.

• Which effect intensifies when vegetation removal increases the rate of solifluction on permafrost slopes?
• Which outcome results from increased mantle dehydration during subduction?
• Which outcome arises when a subducting oceanic plate hydrates the mantle wedge above at a convergent boundary?
• Which phenomenon occurs when localized offshore winds consistently displace surface waters away from mountainous coastal regions?
• With constant wind shear, which outcome destabilizes parabolic dune formations?
• Which process causes nutrient upwelling on the eastern edge of ocean gyres contributing to high marine productivity?