No previous work of somewhat extended nature has been done on the waters of Lingayen Gulf, although mention may be made of the investigations carried on in connection with a study of the marine fauna of the western part of the gulf by Domantay (1937).
The present work embodies the results of a one-year oceanographic survey in which a maximum of ten hydrographic stations was occupied at nearly corresponding dates for twelve successive months from August, 1953, to July, 1954.
The investigation follows a similar pattern reported for Manila Bay (Megia et al., 1953). The primary purpose was to collect physical and chemical data for determining seasonal changes in the oceanographic properties of the gulf.