What Does Wetted Perimeter Mean?
Wetted perimeter of a pipe is the area of the pipe in contact with the fluid that it carries. Sewer systems are designed to perform in a uniform and steady manner to prevent blockage due to deposition of solids due to low velocity of flow or scouring due to high velocity of flow.
Flow parameters such as wetted perimeter and hydraulic radius are important factors in designing an effective sewerage system. Damaged or blocked pipes can be rehabilitated using trenchless rehabilitation techniques such as cured-in-place pipe (CIPP), sliplining and pipe bursting. These new liners or pipes are inserted into the old pipes through manholes, eliminating the need for excavation.