Admin Table of Contents
- 1 What are the natural factors that Favour the construction of dams?
- 2 What are the main features of the dam?
- 3 What are the natural factors that have favored the construction of dams and reservoirs?
- 4 How is a dam constructed?
- 5 How do dams help river navigation?
- 6 How is a dam constructed on a river?
- 7 What kind of materials are used to build dams?
- 8 How are dams used in the modern world?
What are the natural factors that Favour the construction of dams?
Following are the factors affecting selection of dam site by dam type.
- Topography.
- Geology and Foundation Conditions.
- Availability of materials.
- Spillway size and location.
- Earthquake zone.
- Height of the Dam.
- Other factors such as cost of construction and maintenance, life of dam, aesthetics etc.
Is a dam a natural or constructed feature?
A dam can be constructed from concrete or natural materials like earth and rock. Arch dams are made from concrete.
What are the main features of the dam?
Basic Features A dam blocks the flow of water in a river or stream so that it must pass over, through, or around the barrier. On the upstream side, the water backs up into an artificial lake, or reservoir, for storage. Water may pass over the crest of the dam itself or near the dam in chutes, tunnels, or shafts.
What is used for construction of dams?
In modern dam engineering, the choice of materials is usually between concrete, earthfill, and rockfill. Concrete is used to build massive gravity dams, thin arch dams, and buttress dams.
What are the natural factors that have favored the construction of dams and reservoirs?
Solid rock for dams to support weight of dam. Large basins For water storage. Impervious rocks for reservoir to seepage of water. Low evaporation rates….
- To reduce pressure of floods.
- To avoid wastage of water.
- To provide water for irrigation.
What are the benefits of dams?
Benefits Of Large Dams
- WATER FOR DRINKING AND INDUSTRIAL USE.
- IRRIGATION.
- FLOOD CONTROL.
- HYDRO POWER GENERATION.
- INLAND NAVIGATION.
- RECREATION.
How is a dam constructed?
They can be constructed of a variety of materials to include bricks, stones, concrete, steel or PVC. Once built, the water stored behind the dam raises the water table and is then extracted with wells. A sand-storage dam is a weir built in stages across a stream or wadi.
How does dams help in agriculture?
Dams can help increase agricultural production by controlling the supply of irrigation water to crops, protect production from climatic risk, help generate electricity, and reduce the risk of potentially disastrous river floods.
To overcome such obstacles dams are built and they effectively serve the function of controlling the water level as well as changing the course of waterways thereby facilitating efficient inland navigation. Inland navigation is an important means of transport as they permit transport of a massive quantity of goods.
How does the construction of dams positively affect natural resources?
by creating reservoirs, preventing flooding, and renewing destroyed ecosystems. by preventing flooding, creating reservoirs, and providing water for irrigation. by renewing destroyed ecosystems and restoring trees to areas where forest once existed.
How is a dam constructed on a river?
What are the engineering considerations for construction of dams?
According to the introduction and the statistics of dam failures, the 10 most important things to be considered in design of embankment dams:
- 1- Site investigation:
- 2- Laboratory and Field Testing:
- 3- Seepage control design:
- 4-Hydrology study.
- 5- Loading and Factor of Safety – Dynamic Loading.
- 6- Foundation Design.
What kind of materials are used to build dams?
A dam is a structure built across a river or stream to hold back water. People have used different materials to build dams over the centuries. Ancient dam builders used natural materials such as rocks or clay. Modern-day dam builders often use concrete.
How are dams used to hold water back?
A dam is a structure built across a stream or river to hold water back. Dams can be used to store water, control flooding, and generate electricity.
How are dams used in the modern world?
Modern-day dam builders often use concrete. Manmade dams create artificial lakes called reservoir s. Reservoirs can be used to store water for farming, industry, and household use. They also can be used for fishing, boating, and other leisure activities.
Why are storage dams important to the environment?
Storage dams may also provide a water supply or improved habitat for fish and wildlife. They may store water for hydroelectric power generation, irrigation or for a flood control project. These type of dams are used to divert the water of the river into an off-taking canal (or a conduit).