alluvial plain

泥沙沉积而形成土地to allow sediment to deposit and form land

• 因地制宜地推广水平梯田、打坝淤地、引洪漫地等工程措施。

  Promote engineering measures such as level stepped fields, building dams to allow sediment to deposit and form land, and guiding floods to inundate land in accordance with local conditions.

• 以治沟骨干工程为主体的坝系工程建设有滞洪、拦泥、淤地等社会效益。

  The dam series project, of which the main part is the core gulley tackling project, has had social effects such as flood retention, mud blocking, and allowing sediment to deposit and form land.