Drainage Pumps

Drainage pumps are used to control the level of water trapped in a protected area. Entrapment occurs when high lake levels, stream stages, and tides preclude the normal discharge of streams, storm runoff, and seepage from the protected area. These high-water conditions are created by floods and hurricanes or impoundment.

Floods and hurricanes occur infrequently and are relatively short-lived. However, as normal drainage is not possible at such times, all interior drainage that cannot be ponded must be pumped over the protective works if the protective works is a levee or through it if it is a concrete flood wall. Pumps for this purpose are strategically located at the edge of pending areas and streams, in sewer systems, or in the protective works. These pumps are operated continuously or are cycled on and off as necessary to maintain the water level in the protected area below the elevation at which damage would be experienced. As their use is required only during emergency situations and usually under adverse weather conditions, reliability of operation is essential.

Where valuable low-lying areas must be protected against inundation due to backwater, gravity drainage from the area is generally not possible. In such situations, all seepage and storm-water runoff entering the protected area must be pumped. The pumping of seepage is often a continuous operation, whereas the pumping of storm-water runoff is intermittent. Both can occur simultaneously because inflow due to seepage does not stop during a rainstorm. It therefore is necessary to provide pumps that can handle seepage and storm water simultaneously.

Survival Treasure

Survival Treasure

This is a collection of 3 guides all about survival. Within this collection you find the following titles: Outdoor Survival Skills, Survival Basics and The Wilderness Survival Guide.

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