A bucket dredger is a type of excavation equipment used primarily for underwater mining and dredging. It operates by using a series of large buckets attached to a rotating chain or conveyor system. These buckets scoop up sediment, sand, or gravel from the bottom of rivers, lakes, or oceans, allowing for the removal of materials for construction or land reclamation. The design of bucket dredgers enables them to work in various water depths and conditions. They are often employed in projects related to harbor construction, canal maintenance, and beach nourishment, making them essential tools in the field of civil engineering and environmental management.