Which mechanism causes increased salinity observed within abandoned oxbow lakes located in arid regions?

💡 Explanation

When oxbow lakes are cut off from river flow in arid lands, capillary action pulls groundwater to the surface where evaporation happens because the potential gradient is high resulting in salt deposition. Therefore the salinity increases, rather than sedimentation, weathering or levee failure, which are independent process/mechanisms that create specific geological modifications.

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