The wind-induced slope of the surface in an 800-foot model-yacht pond has been measured to a relative accuracy of 5 x 10-7. This slope is proportional to the sum of the surface and bottom stresses….
Van Dorn, William G.. 1954. "Wind stress on an artificial pond." Journal of Marine Research 12, (3). https://elischolar.library.yale.edu/journal_of_marine_research/798