Agricultural Engineering

Posts Under Agricultural Engineering

What do you understand by the term ‘lining of irrigation channels’ what is the necessity for lining the irrigation channels? State the different materials used the lining the water course with their relative merits and demerits?

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Purpose of Canal Lining: Implementation of irrigation scheme which includes extensive distribution system is an expensive proposition. Hence it is very necessary to ensure that large losses do not occur in transit due to seepage. In practice, however, considerable loss of water takes place due to seepage in earthen canals. This loss is unavoidable unless […]

Write about the suitability of the Parshall Flume over Weir as a flow measuring device?

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Parshall Flume Diagram of a Parshall flume, showing free-flow and submerged flow operating regimes A modified version of the Venturi flume is the Parshall flume. Named after it creator, Dr. Ralph L. Parshall of the U.S. Soil Conservation Service, the Parshall flume is a fixed hydraulic structure used in measuring volumetric flow rate in surface […]

List out the characteristics of Centrifugal Pumps?

List out the characteristics of Centrifugal Pumps?

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Characteristics of Centrifugal Pumps Centrifugal pumps are specified by four characteristics. 1. Capacity: This is defined as the quantity of liquid which is discharged from the pump in a given time. Capacity is expressed in ‘m3/hr’, ‘gal/min’, ..etc. The capacity of a pump is governed by the ‘Head’, the ‘Speed’ and the ‘Size’ of the […]

What is the Booster Pump? What role does it play in a sprinkler irrigation?

What is the Booster Pump? What role does it play in a sprinkler irrigation?

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Booster Pump Most pumps are used to take water from a standing (or non-pressurized) source and move it to another location. For example, a pump might take water from a lake and move it to a sprinkler system. A booster pump, on the other hand, is used to increase the water pressure of water that […]

Classify different methods of irrigation stating suitability of each under different situations of crop, water and soil conditions?

Classify different methods of irrigation stating suitability of each under different situations of crop, water and soil conditions?

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Irrigation methods Many different methods are used by farmers to irrigate crops. They range from watering individual plants from a can of water to highly automated irrigation by a centre pivot system. However, from the point of wetting the soil, these methods can be grouped under five headings, namely: Flood irrigation – water is applied […]

Explain the mechanism of Stevens ‘F’ type stage level recorder?

Explain the mechanism of Stevens ‘F’ type stage level recorder?

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Type F – Water Level Recorder The US Type F Water Level Recorder is an inexpensive, accurate versatile recorder for general-purpose recording including: Stream gaging Irrigation Sewerage Water supply Ground water studies The Type F Water Level Recorder is an instrument for permanently recording varying levels of any liquid surface. Among other uses, flow data […]

Write short notes on: 1. Saltation 2. Surface Creep in Wind Erosion

Write short notes on: 1. Saltation 2. Surface Creep in Wind Erosion

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1. Saltation Saltation is the transportation of sand grains in small jumps by wind or flowing water. The term does not refer to salt, but is derived from the Latin saltare, to dance. Saltation is the main process that suspends soil particles in the air – particles between 0.1 and 0.5mm in diameter are lifted […]

Mention the causes of soil erosion in India. What measures you will suggest to control the soil erosion?

Mention the causes of soil erosion in India. What measures you will suggest to control the soil erosion?

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Soil erosion is a process of detachment and transportation of soil by natural agencies of water and wind. Factors Influencing Soil Erosion: There are many factors which influence the process of soil erosion; these are discussed below: Rainfall: Precipitation is the most forceful factor causing erosion. Erosion is dependent on the amount, duration, intensity and […]

Define the runoff. What are the factors that affect the runoff?

Define the runoff. What are the factors that affect the runoff?

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Introduction to Runoff Over the land surface, for the generation of runoff, the primary source of water is Rainfall. A part of rainfall that intercepted by the vegetation, buildings and other objects and prevented to reach them on grand surface is called as interception. Part of rainfall stored in the surface depressions which in due […]

Show with a diagram the different components of a permanent soil conservation drop structure? What role is played by each component?

Show with a diagram the different components of a permanent soil conservation drop structure? What role is played by each component?

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Drop Spillway It is a weir structure, in which flow passes through the weir opening, fall or drops on an approximately level apron or stilling basic and then passes into the downstream channel. Its use is limited to a maximum drop of 3 m. It is mainly used at the gully bed to create a […]