Pumps for Groundwater Lowering Duties

This chapter discusses the basic principles of pumping are introduced, and different categories of pumps. A groundwater control designer or practitioner does not need to understand every aspect of pump construction at the nuts and bolts level, and similarly, need not be expert in the hydrodynamic theories that describe how pumps move water. The physical mechanism of pumping has an important effect on how a pump responds to changes in pumping conditions. Sump pumping is one of the most common pumping applications on construction sites. Photograph of contractor’s submersible pump. The pump in cylindrical in shape. The intake is at the base of the pump, and the outlet emerges tangentially above the intake. An electrical power cable feeds power to the pump. The wellpoint pump operates on the suction principle and is positioned at some elevation above the level of the installed wellpoint screens – generally at the level of the header main.