Described in this paper is a technique of using artificial water boundaries in theories of ocean currents. As boundary values, geostrophic currents are suggested. This technique may hold promise for other applications in theoretical discussions of ocean currents.
Hidaka, Koji. 1958. "Boundaries in the theory of ocean currents." Journal of Marine Research 17, (1). https://elischolar.library.yale.edu/journal_of_marine_research/917