What are the advantages and disadvantages of Persian wheel?

What are the advantages and disadvantages of Persian wheel?

Persian wheel is useful in mountainous (hilly) areas due to close water level; it is suitable for small scale farming. Disadvantages: Persian wheel can irrigate small areas, lot of effort is needed and it is time taking. Ans: Advantages: (1) Tube well reduces dependence on rain. (2) Tube well speed can be controlled.

What is the use of Persian wheel?

The Persian wheel is a mechanical water lifting device operated usually by draught animals like bullocks, buffaloes or camels. It is used to lift water from water sources typically open wells. In Sanskrit the word Araghatta has been used in the ancient texts to describe the Persian Wheel.

What are the disadvantages of tube wells?

The main disadvantage of using tube well systems for irrigation purposes is that it leads to depletion of the groundwater because of which the groundwater stock or pool may get exhausted and ground water is only used as a source.

How does the Karez system work?

Karez are constructed as a series of well-like vertical shafts, connected by sloping tunnels, which tap into subterranean water in a manner that efficiently delivers large quantities of water to the surface by gravity, without need for pumping.

What is the wheel used by farmer called?

What exactly is a Persian wheel? Also known as Rahat (in Urdu), it’s a simple water lifting device, where a number of small pots are attached to a long chain.

Why Tube wells are better than wells?

Two advantages that tube wells have over surface wells are: Tube wells can irrigate larger areas than surface wells. They can supply water even during the droughts as they can draw water even from great depths.

What are the advantage and disadvantage of Tube wells?

Advantages: Tube wells do not result in evaporation of water like suface wells. It irrigates large area (400 hectares). Disadvantage: However tube wells are only possible in areas where the groundwater level is not too low power is needed to drain water.

What are the disadvantages of perennial canals?

Disadvantages- Canal irrigation can cause water logging which can make the soil unproductive because water logging brings harmful salt and alkaline material to the surface level. Due to stationary water in canal many disease can be caused due to mosquitoes and insects.

What are the disadvantages of inundation canals?

Disadvantages of Inundation Canals Disadvantages of foundation canals are as following.

• As there is no headworks structure the head of the canal is liable to be washed away during floods.
• The duty of water is very low.
• Since the availability of water is dependent upon floods, the scarcity of water is always felt.

What kind of drive does a Persian wheel have?

Persian wheels are usually driven by some form of right angle drive. The first is the most common, where the drive shaft from the secondary gear is buried and the animals walk over it; this has the advantage of keeping the Persian wheel as low as possible to minimize the head through which water is lifted.

Is the Persian wheel still used in Pakistan?

The Persian wheel continues to be the main lifting device for water. In Pakistan, Persian wheels continue to operate in the provinces of Punjab and Sind lifting water from open wells. Elsewhere, as ground water levels decline in India, Persian wheels cannot reach the water to draw them out from open wells.

How is the Persian wheel used for irrigation?

It is also known as Persian Wheel. This is an Urdu word and the method is also internationally known as the Persian wheel. It involves the use of two large wheels joined by a belt, on which a number of water pots collect water from underground. The wheel is traditionally turned by large animals such as oxen.