basin 10 and the sand carried by the tidal water would tend to be deposited into the catch basin rather than on the normal bottom of the passageway or inlet 20 the sand or sediment thus accumulated can be periodically removed by pumps 30 and pipes 32 which could be permanently connected to openings 34 in the bottom of the basin 10 as illustrated in fig2 or temporarily as illustrated diagrammatically in fig3 the number and nature of the parts will be determined according to the size and volume of the sediment addressed the catch basin 10 is preferably formed so that its interior walls are substantially smooth this permits the movement of accumulated sand and sediment toward the bottom of the catch basin 10 it is anticipated that the catch basin 10 can be located in various locations such as the outlets of rivers or wherever sand bars tend to form so that the sand and sediment that otherwise would be deposited from the current to the bottom of the water is accumulated in a predetermined position from which it can be pumped to locations on the upland and permitted to dry from its fixed location the sand and sediment can be transported to other locations such as beach replenishment areas or land fill areas an example of such an installation is shown in fig4 in which an inlet 20 opens to the sea 22 and forms a passage of water between the sea 22 and a bay or the like not shown jetties 26 located at opposite sides of the inlet 20 can be formed of stone and concrete tidal flow would thus be directed in both directions within the inlet 20 the flowing water at least from the.