Abstract: | The paper analyses the effect of non-linearity and bottom friction on propagation of tsunami-type surface waves from the abyssal
part of the Black Sea towards the shelf zone. The study relies, on numerical solution of unidimensional non-linear equations
for long waves, using the finite-difference technique. Numerical experiments have been conducted for the bottom profile continental
slope and shelf, with the full wave reflection being prescribed at a 10-m depth contour. It has been shown that the major
role in transforming solitary waves belongs to non-linear topographic factors rather than to dissipation. The reflected wave
has been found to be non-linearly distorted, and wave heights in the Black Sea coastal zone have been found to increase by
many times.
Translated by Vladimir A. Puchkin. |