Saturday, 26 November 2016

Canals - Short Questions & Answers

Canals - Short Questions & Answers Points :Canals Short Questions and Answers Q.1: Define the term of canal. Ans : A canal is an artificial channel, generally trapezoidal in shape constructed on the ground to carry water to the fields either from the river or from a tank or Reservoir. Canals can be Classified in following says. Q.2: Write down the classification of canal based on the nature of source of supply. Ans : A canal is said to be permanent when it is fed by a permanent source of supply. The canal is a well made up regular graded channel. It has also permanent masonry works of regulation and distribution of supplies. A permanent canal is also sometimes known as perennial canal when the sources from which canal takes is an ice fed perennial river. Q.3: Write down the difference between permanent and Inundation canal. Ans : Inundation Canals usually draw their supplies from rivers whenever there is a high stage in the river.

Friday, 11 November 2016

Canals

Canals Points : canals, advantages of canal lining, disadvantages of canal lining Classification A canal is an artificial channel, generally trapezoidal in shape constructed on the ground to carry water to the fields either from the river or from a tank or Reservoir Canals can be Classified in following says. (a) Classification based ‘on the nature of source of supply 1. Perennial canal.
2. Inundation canal.

A canal is said to be perennial when it is fed by a permanent source of supply. The canal is a well made up regular graded channel. It has also permanent masonry works of regulation and distribution of supplies. A permanent canal is also sometimes known as perennial canal when the sources from which canal takes is an ice fed perennial river.

Saturday, 29 October 2016

Weir and Barrage - Short Questions & Answers

Weir and Barrage - Short Questions & Answers Points : weir and barrage - short questions & answers Q.1: Write down the difference between weir and barrage. Ans: Weir
The weir is a solid obstruction put across the river to raise its water level and divert the water into the canal. If a weir also stores water for tiding over small periods of short supplies, it is called a storage weir.
Barrage
The function of a barrage is similar to that of weir, but the heading up of water is effected by the gates alone. No solid obstruction is put across the river. The crest level in the barrage is kept at a low level. During the floods, the gates are raised to clear off the high flood level, enabling the high flood to pass downstream with maximum afflux. . When the flood recedes, the gates are lowered and the flow is obstructed, thus raising the water level to the upstream of the barrage. Due to this, there is less silting and better control over the levels.
Q2: Write down the important components of barrage. Ans: (1) Divide wall
(2) inverted filter
(3) under sluices
(4) fish leader
(5) Flexible apron
(6) Sheet piles
Q.3: Write down the purpose of barrage. Ans: (1) To allow proper silt control
(2) To provide better regulation than a weir
(3) To divert the required quantity of water from the river to the canals.

Friday, 21 October 2016

Weir and Barrage

Weir and Barrage Points : weir and barrage, components / parts of barrage or weir, the fish ladder, the under sluices, functions of scouring sluices, capacity of under sluices, the canal head regulator, functions of head regulator, design considerations, silt control at head work, type of weir, causes of failure of weirs and their remedies, design of impervious floor for sub surface flow, bllgh’s creep theory Weir Barrage The weir is a solid obstruction put across the river that raise its water level and divert the water into the canal. If a weir also stores water for tiding over small periods of short supplies, it is called a storage weir. The main difference between a storage weir and a dam is only in height and the duration for which the supply is stored. A dam stores the supply for a comparatively longer duration.

Monday, 10 October 2016

Irrigation system of Pakistan - Short Questions & Answers

Irrigation system of Pakistan - Short Questions & Answers Points : irrigation system of pakistan - short questions & answers Q.1: Write down the name of different methods of irrigation: Ans(1) Surface irrigation method
(2) subsurface irrigation method
(3) Sprinkler irrigation method
Q.2: Write down the name of different methods of surface irrigation. Ans (1) Flooding method
(2) furrow method
(3) Contour method
Q.3: Write down any two basic requirements for adaptation of any irrigation methods. Ans The basic requirements for adaptation of any irrigation method or mode of application of water are as follows:
1. The method should be such that uniform water distribution with as small as 6 cm water depth applications can be made for light irrigations.
2. At the same time it should afford heavy uniform application of 15 to 20 cm water depth.

Friday, 30 September 2016

Irrigation System in Pakistan

Irrigation System in Pakistan Points : Irrigation System in Pakistan, Different Methods of Irrigation, Uncontrolled or Wild Flooding, Free Flooding, Contour Laterals, Border Strip Method, The Zigzag Method, Furrow Method, Advantages of Furrow Irrigation, Corrugation Methods, Contour Framings, Sub-Surface Irrigation, Sprinkler Irrigation, Advantages of Sprinkler Irrigations, Advantages of Drip Irrigation System, Disadvantages of Drip Irrigation System, Important Barrages of Pakistan Different Methods of Irrigation Different Methods of Irrigation Irrigation water may be applied to the crops by three basic methods: (1) Surface irrigation method, (2) Sprinkler irrigation method, and (3) Sub-surface irrigation method. The surface irrigation method can further be sub-divided into various methods as indicated below:
Irrigation water may be applied to the crops by three basic methods: (1) Surface irrigation method, (2) Sprinkler irrigation method, and (3) Sub-surface irrigation method. The surface irrigation method can further be sub-divided into various methods as indicated below: Every irrigation method has both advantages and disadvantages. Before selecting a particular method, the irrigation engineer (or agricultural engineer) must evaluate all the factors, and choose that method which is best suited to the local conditions.

The basic requirements for adaptation of any irrigation method or mode of application of water are as follows:
1. The method should be such that uniform water distribution with as small as 6 cm water depth applications can be made for light irrigations.
2. At the same time, it should afford heavy uniform application of 15 to 20cm water depth.
3. It should allow the use of large concentrated water flows for reduction of conveyance losses, and labour cost

Thursday, 29 September 2016

Irrigation Short Questions & Answers

Irrigation Short Questions & Answers Points : Irrigation Short Questions & Answers Q.1 Define the term of Irrigation. Ans: Irrigation may be defined as the process of artificially supplying water to soil for raising crops. Q.2: What is necessity of Irrigation? Ans: Pakistan s basically an agricultural country, and all its resources depend on the agricultural output Q.3: Write down the name which scope of Irrigation Is divided. Ans: The scope of irrigation is not limited to the application of water to the soil. It deals with all aspects and problems extending from the watershed to the agricultural farms. It deals with the design and construction of all works, such as dams, weirs, head regulators etc. in connection with the storage or diversion of water, as well as the problems of subsoil drainage, soil reclamation J*id water-soil-crop relationships.