alluvion

详细解释:n. 冲积层, 击岸波
【法】 冲积地, 新生地, 泛滥

英语解释：

名词 alluvion:

gradual formation of new land, by recession of the sea or deposit of sedimentthe rising of a body of water and its overflowing onto normally dry land同义词：flood, inundation, deluge