throughflow

Etymology
.

Noun

 * 1)  The movement of water horizontally beneath the land surface, usually when the soil is completely saturated.
 * 2)  The movement of an identifiably separate body of water through a larger body (such as a current of fresh water through salt water).
 * 3) * 2001, Harry L. Bryden, Shiro Imawaki, 6.1: Ocean Heat Transport, Gerold Siedler, John Church, John Gould (editors), Ocean Circulation and Climate: Observing and Modelling the Global Ocean, Harcourt Science and Technology (Academic Press), page 464,
 * As for the Pacific, the unknown size of the complicates quantitative estimates of heat transport divergence in the Indian Ocean. Because the Throughflow entering the Indian Ocean is warm (about 20°C) relative to its temperature as it exits the Indian Ocean across the southern boundary at 32°S, the overall effect of the Throughflow is to lead to an ocean heat transport convergence over the Indian Ocean.