BigPatents India

A method for protecting ashore from erosion using reef(s) by reducing longshore currents resulting from incoming waves comprising: (a) determining an average or mode direction of travel of the incoming waves; (b) determining a required direction of the waves approaching the shore which direction is selected to obtain the desired reduction of longshore currents; (c) placing at least one elongate reef on the floor of a body of water adjacent to the shore, wherein the reef or each reef is oriented at a preselected angle relative to the average or mode direction of travel of the incoming waves and has pre-selected dimensions selected to refract waves traveling these over such that the reef or each reef, or a plularity of said reefs cumulatively, modify the direction of travel of the incoming waves to said required direction.