It is usually assumed in problems of sea water intru-sinto coastal water-bearing beds that the sea bottom is horizontal [1] or that in coastal areas, fresh water outflows into horizontal drainage cracks [2-4]. These were substantially developed in work [5], where interface between the fresh and salt water was for the first time interpreted as an analog of the percolation irtterface and a flow towards a vertical sea bank was considered. That article was the starting point for further studies of problems of this type [6-8].
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