overtop
verb uk/ˌəʊ.vəˈtɒp/ us/ˌoʊ.vɚˈtɑːp/
[ T ]高出，比…高
(of water) to rise to such a high level that it goes over the top or edges of something
Floodwaters overtopped the levees that year. 那年洪水淹没了堤坝。
[ I ]（河流、湖泊等因涨水而）漫过堤岸
(of a river, lake, etc.) to have so much water that the water goes over the top or edges of it
There are fears that the river will overtop. 人们担心河流会决堤。