coastal erosion
Technical term for the gradual wearing away of coastlines by wave action, currents, or weather.
海岸侵食が進み、砂浜が年々狭くなっている。
Coastal erosion is progressing, and the sandy beach is getting narrower every year.
この地域では海岸侵食対策として護岸工事が行われている。
In this area, seawall construction is being carried out as a measure against coastal erosion.