Sedimentation (water treatment)
（重定向自Sedimentation Tank）
![Figure3: Typical batch-settling column test on a suspension exhibiting zone-settling characteristics](/Images/godic/202502/10/Fig3SB2443.png")
Sedimentation is a physical water treatment process using gravity to remove suspended solids from water. Solid particles entrained by the turbulence of moving water may be removed naturally by sedimentation in the still water of lakes and oceans. Settling basins are ponds constructed for the purpose of removing entrained solids by sedimentation. Clarifiers are tanks built with mechanical means for continuous removal of solids being deposited by sedimentation.