One factor that could account for a rise in the water table is

High amount of rainfall is the factor which increases water table in the ground.

Explanation: In cities and densely populated areas of the world, water is extracted from the ground through tube well. This water is mainly used for drinking and washing in the houses. In these areas, water is utilized in large amounts due to which level of water in ground decreases. So heavy rainfall cause water table rise due to absorption of rain water by the soil.

more precipitation

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