surface water

water source located above the surface of the ground

For water masses on the surface of the world ocean, see Surface water (ocean). Water collecting on the ground or in a stream, river, lake, or wetland is called surface water; as opposed to groundwater. Surface water is naturally replenished by precipitation and naturally lost through discharge to the oceans, evaporation, and sub-surface seepage into the groundwater. Although there are other sources of groundwater, such as  connate water and magmatic water, precipitation is the major one and groundwater originated in this way is called meteoric water.
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All water naturally open to the atmosphere (rivers, lakes, reservoirs, ponds, streams, impoundments, seas, estuaries, etc.)

surface-water /'sə:fis,wɔ:tə/
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