A criterion or index for assessing the hazard of storm-induced coastal erosion is suggested. It is based on comparison of actual beach volume \(~{{V}_{b}}\) and its optimal value \({{V}_{{b^{*}}}}\) sufficient to avoid irreversible beach changes due to severest storm attack over the year. The erosion hazard level is determined taking into account the difference of \(~{{V}_{b}}\) and \({{V}_{{b^{*}}}}\); it reaches the maximum (3 points) when the actual beach volume becomes less than a half the optimal value (0 points corresponds to \(~{{V}_{b}}\) > \({{V}_{{b^{*}}}}\)). To calculate the erosion index, a representative beach profile is required, as well as the data on the mean sand size and wind/wave regime. The erosion index is tested on the coasts of the Anapa bay-bar (Black Sea) and southern part of the Vistula Spit (Baltic Sea). The index makes it possible distinguish vulnerable sections of the coast, and at the same time it reflects the sediment deficit volume that could be used in shore protection designs.

建议使用评估风暴引起的海岸侵蚀危害的标准或指数。它基于比较实际海滩体积\（〜{{V} _ {b}} \\）和最佳值\（{{V} _ {{b ^ {*}}}} \\）的比较，足以避免不可逆转由于一年中最严重的风暴袭击，海滩发生了变化。确定腐蚀危害等级时要考虑\（〜{{V} _ {b}} \）和\（{{V} _ {{b ^ {*}}}}} \）的差；当实际的沙滩容积小于最佳值的一半时，它会达到最大值（3分）（0分对应于\（〜{{V} _ {b}} \） > \（{{V} _ {{ b ^ {**}}} \））。为了计算侵蚀指数，需要有代表性的海滩剖面以及平均沙粒尺寸和风/浪状况的数据。侵蚀指数在阿纳帕湾酒吧（黑海）和维斯瓦河喷口南部（波罗的海）海岸进行了测试。该指数可以区分海岸的脆弱区域，同时可以反映可用于海岸保护设计的沉积物赤字量。