aggrades

v.build up to a level by depositing sediment

1. As the river aggrades, the floodplain becomes higher over time.
   随着河流的淤积，泛滥平原随着时间的推移变得更高。
2. The delta aggrades as new sediments are deposited.
   随着新沉积物的沉积，三角洲逐渐淤积。