RK has various meanings in the NASA category. Discover the full forms, definitions, and usage contexts of RK in NASA.
The process by which water is added to a reservoir or zone of saturation, often by runoff or percolation from the soil surface. The period of time during the water-budget cycle when the water in the ground is being replenished. The process by which new water is added to the saturated zone, replenishing water that is lost.
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