Table of Contents
Introduction Of Detention Dam
Detention dam is used to collect stream and surface runoff. The primary purpose of this dam is to control the water flow in the areas below the dam.
Detention dams play an important role in controlling floods. It can store excessive water during floods. Water can be released later when the situation becomes normal.
Description
There are two important reasons for building a detention dam. Detention dams are used to control flow and sediment separation. Retention dams are common in flood-prone areas to prevent flooding. This type of dam is constructed at a high place.
Flood water collects in a basin above the dam and is released at a rate that suits the floodplain and canal. Dikes, canals, streams, drainage ditches and rivers are examples of canals. To prevent overflow, reservoirs above flood control dams must be kept at a minimum water level.
When the water level behind a dam is higher than its top, a flood results. The upper edge of the dam wall coincides with the top of the dam. Extreme floods and powerful waves are the main causes of floods. Strong winds, landslides and earthquakes can all produce large waves. While resizing the retaining dam, the possibility of flooding should be kept in mind and planned accordingly.
The amount of water released into the canal is controlled by retention dams built to restrict the flow. Surface runoff is limited by groundwater or storage dams that replenish groundwater so that the ground can absorb the water.
Water that naturally enters the aquifer by gravity is known as groundwater. A layer of permeable soil and rock beneath the Earth’s surface known as an aquifer allows water to collect between the rock and soil.
Design Considerations For Detention Dam
There are two main types of detention dams. Detention dams are often built with a metal base for reinforcement and are made of masonry or concrete. The cross section of a concrete or masonry dam usually resembles a right-angled triangle, with the sloping face pointing upward and the vertical face pointing downward.
Detention dams can also be constructed of rock or earth as gravity embankment-style structures. An equilateral triangle with angled sides facing upstream and downstream most closely mimics the cross sectional geometry of an earth and rock gravity embankment style dam. Modern detention dam designs include safety components that take into account the possibility of failure and prepare for it.
FAQ
What Is A Detention Dam?
Detention dam is used to control flow and normally built in flood prone area. Detention dam is constructed at a high place.