STUDY ON SAND RECYCLING SYSTEM USING A RELAY PUMP FOR LONG DISTANCE SAND EXTRACTION SYSTEM - SAND RECYCLING SYSTEM OF TOTTORI METHOD

In Tottori Prefecture, sand dredging is a challenge in sandy beaches in the vicinity of the quay or mooring basins with shallow water depth where larger-scale dredgers cannot operate. Therefore, an alternative compact sand extraction system is required. In this study, a new sand recycling system was developed using a compact jet pump sand extraction device combined with a relay pump for longer distances. This system is more compatible with the dredging sand volume of approximately 1000-3000 m3 per year, which is characteristic of the small fishery ports in Tottori. The effects of the new system were examined through a field test.