ppt bandhara irrigation
#1

I want a ppt on sot

bandhara irrigation
i request to u that give me full ppt on bandhare irrigation system..............etc
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#2
Lift Irrigation: It is that system of irrigation in which irrigation water is available at a level lower than that of the land to be irrigated and hence water is lifted by pumps or other mechanism (Hydraulic ram and siphon action) and then conveyed to agriculture fields by gravity flow.
Irrigation through wells is an example of lift irrigation. Water from canals or any other source can also be lifted when the level of water is lower than that of the area to be irrigated.
Inundation Irrigation: It is that system of irrigation in which large quantity of water flowing in a river is allowed to flood or inundate the fields to be cultivated. The land becomes thoroughly saturated. Excess water is drained off and the land is prepared for cultivation. Moisture stored in the soil is sufficient to bring the crop to maturity. Inundation irrigation is commonly practiced in delta region of rivers. Canals may be also employed to inundate the fields when water is available in plenty.
Perennial Irrigation: It is that system of irrigation in which irrigation water is supplied as per the crop requirements at regular intervals throughout the crop period. The source of irrigation water may be a perennial river, stored water in reservoirs or ground water drawn from open wells or bore wells. This is the most commonly adopted irrigation system.
Direct Irrigation:
It is a type of flow irrigation in which water from rivers and streams are conveyed directly to agricultural fields through a network of canals, without making any attempt to store water this is practiced in areas where the rivers and streams are perennial. Small diversion dams or barrages may be constructed areas the rivers to raise the water level and then divert the water into canals.

Storage Irrigation:
Dams are constructed across rivers which are non- perennial. The discharge in such rivers may be very high during rainy season and may become less during dry stream. By constructing dams across such rivers water can be stored as reservoir during excess flow and can be utilized or diverted to agriculture fields through canals as and when required. Such a system is known as storage irrigation.

Bandhara Irrigation: It is a special irrigation scheme adopted across small perennial rivers. This system lies somewhere between inundation type and permanent type of irrigation. A Bandhara is a low masonry weir (obstruction) of height 1.2m to 4.5m constructed across the stream to divert water into a small canal. The canal usually takes off from one side and the flow into the canal is controlled by a head regulator.
The length of the main canal is usually restricted to about 8km. A series of Bandharas may be constructed one below the other on the same stream so that water spilling over from one Bandhara is checked by another Bandhara. The irrigation capacity of each Bandhara is may be about 400 hectares. Bandharas are adopted across small streams having isolated catchments
which are considered to be non feasible or uneconomical to be included under a large irrigation scheme.
This method of irrigation is followed in Central Maharashtra and is comm only known there asthe `Phad� system.
Advantages of Bandharas:
1. Small quantity of flow in streams can be fully utilized or otherwise might have gone as a waste.
2. As the length of the canal is short, seepage and evaporation losses are less.
3. Intensive irrigation with high duty may be achieved and the area to be irrigated is close to the source.
4. The initial investment and maintenance cost of the system is low.
Disadvantages of Bandharas:
1. The supply of water is unreliable when the flow in streams becomes lesser.
2. Excess water available cannot be utilized as area for cultivation below each Bandhara is fixed.
Hydrology and Irrigation Engineering 10CV55
Dept of Civil Engg,SJBIT Page 48
3. In dry seasons, people living on the downstream side of Bandharas may be deprived of water for domestic made also.
Reply
#3

(27-08-2016, 10:49 AM)ijasti Wrote: Lift Irrigation: It is that system of irrigation in which irrigation water is available at a level lower than that of the land to be irrigated and hence water is lifted by pumps or other mechanism (Hydraulic ram and siphon action) and then conveyed to agriculture fields by gravity flow.
Irrigation through wells is an example of lift irrigation. Water from canals or any other source can also be lifted when the level of water is lower than that of the area to be irrigated.
Inundation Irrigation: It is that system of irrigation in which large quantity of water flowing in a river is allowed to flood or inundate the fields to be cultivated. The land becomes thoroughly saturated. Excess water is drained off and the land is prepared for cultivation. Moisture stored in the soil is sufficient to bring the crop to maturity. Inundation irrigation is commonly practiced in delta region of rivers. Canals may be also employed to inundate the fields when water is available in plenty.
Perennial Irrigation: It is that system of irrigation in which irrigation water is supplied as per the crop requirements at regular intervals throughout the crop period. The source of irrigation water may be a perennial river, stored water in reservoirs or ground water drawn from open wells or bore wells. This is the most commonly adopted irrigation system.
Direct Irrigation:
It is a type of flow irrigation in which water from rivers and streams are conveyed directly to agricultural fields through a network of canals, without making any attempt to store water this is practiced in areas where the rivers and streams are perennial. Small diversion dams or barrages may be constructed areas the rivers to raise the water level and then divert the water into canals.

Storage Irrigation:
Dams are constructed across rivers which are non- perennial. The discharge in such rivers may be very high during rainy season and may become less during dry stream. By constructing dams across such rivers water can be stored as reservoir during excess flow and can be utilized or diverted to agriculture fields through canals as and when required. Such a system is known as storage irrigation.

Bandhara Irrigation: It is a special irrigation scheme adopted across small perennial rivers. This system lies somewhere between inundation type and permanent type of irrigation. A Bandhara is a low masonry weir (obstruction) of height 1.2m to 4.5m constructed across the stream to divert water into a small canal. The canal usually takes off from one side and the flow into the canal is controlled by a head regulator.
The length of the main canal is usually restricted to about 8km. A series of Bandharas may be constructed one below the other on the same stream so that water spilling over from one Bandhara is checked by another Bandhara. The irrigation capacity of each Bandhara is may be about 400 hectares. Bandharas are adopted across small streams having isolated catchments
which are considered to be non feasible or uneconomical to be included under a large irrigation scheme.
This method of irrigation is followed in Central Maharashtra and is comm only known there asthe `Phad� system.
Advantages of Bandharas:
1. Small quantity of flow in streams can be fully utilized or otherwise might have gone as a waste.
2. As the length of the canal is short, seepage and evaporation losses are less.
3. Intensive irrigation with high duty may be achieved and the area to be irrigated is close to the source.
4. The initial investment and maintenance cost of the system is low.
Disadvantages of Bandharas:
1. The supply of water is unreliable when the flow in streams becomes lesser.
2. Excess water available cannot be utilized as area for cultivation below each Bandhara is fixed.
Hydrology and Irrigation Engineering 10CV55
Dept of Civil Engg,SJBIT Page 48
3. In dry seasons, people living on the downstream side of Bandharas may be deprived of water for domestic made also.
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