Water injection dredging is a technique used to remove sediment from waterways, ports, and harbors. It involves the use of high-pressure water jets to dislodge sediment from the bottom of a waterway, which is then transported and deposited elsewhere. The water jets are typically powered by pumps and are directed towards the sediment using a flexible hose or nozzle. As the water jets hit the sediment, they break it up and create a suspension of sediment and water, which is then transported away from the site using the natural flow of the waterway. The sediment can be deposited at an appropriate location, such as a designated dredge spoil area, or used for land reclamation or beach nourishment. Water injection dredging is a relatively low-impact method of dredging, as it does not involve the use of heavy equipment that can damage the environment or disrupt marine life. It is also a cost-effective method, as it requires less equipment and manpower compared to traditional dredging methods.