A series of physical oceanographic investigations of the circulation in the Kwang Bay' were carried out seven times from May 1974 to May 1975 every other month. The average water transports through the southern entrance of the' Kwang Yang Bay were approximately 1,014×I06m3/half-tide in ebb current and 278×106m3</TEX/half-tide in flood current, while at the Noryang Sudo there were approximately 405.6×I06m34/half-tide in ebb current, and 282×106m3 /half-tide in flood current, at the maximum current intensity. The water from Seomjin River flows into the bay at an annual average rate of 84×I06m3/half-tide, the rate being fluctuated from month to month from 6.0×106m3 to 11. 5×I06m3 per half-tide.

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