On the Electric Field due to Tides

Abstract

It has been pointed out that one of the main causes of faults on submarine cables would be the electrolytic corrosion due to the current which is induced in the cable by tides moving across the earth's magnetic field. In this paper, some formulas for electric field due to a stream of water which flows in a tide-way of rectangular cross-section are derived, and results of numerical computations are shown. The effects of conductivity of the bottom are also treated as boundary value problems. It is found that the sides of tide-way are the most dangerous places as the intense electrolytic corrosion of cable occurs there.