Madan Mohan

Posts by Madan Mohan

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 […]

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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 […]

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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 […]

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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 […]

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State the Rational formula for estimating the peak rate of runoff from the small watersheds. List out the basic assumptions made under the Rational formula?

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Procedure for using the Rational Method The rational formula estimates the peak rate of runoff at a specific location in a watershed as a function of the drainage area, runoff coefficient, and mean rainfall intensity for duration equal to the time of concentration. The rational formula is: Where: Q = maximum rate of runoff (cfs […]

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What are the steps involved in the design of the contour bunds? How these parameters can be estimated?

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Contour Bunding Bunding or construction of small embankment is carried out to reduce the length of slope, to reduce the velocity of runoff water and to hold the water in the catchment for a longer period. Thus more water infiltrates into the ground and less run-off and soil erosion take place. Different types of bunds […]

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Classify Bench Terraces and write the conditions under which each type will be suitable?

Classify Bench Terraces and write the conditions under which each type will be suitable?

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Terracing: “A terrace is an embankment or ridge of earth constructed across a slope to control runoff and minimize soil erosion”. A terrace reduces the length of the hill side slope, thereby reducing sheet and rill erosion and prevents formation of gullies. Types of Terraces: There are two measure types of terrace. Bench Terrace: which […]

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Write short notes on: 1. Remote Sensing; 2. GIS

Write short notes on: 1. Remote Sensing; 2. GIS

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1. Remote Sensing: We perceive the surrounding world through our five senses. Some senses (touch and taste) require contact of our sensing organs with the objects. However, we acquire much information about our surrounding through the senses of sight and hearing which do not require close contact between the sensing organs and the external objects. […]

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What points you will consider while selecting a site for the construction of a farm pond?

What points you will consider while selecting a site for the construction of a farm pond?

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Factors to be considered in site selection: 1. Ecological factors 2. Biological and operational factors 3. Economic and social factors In order to select a suitable site for aquaculture, the following factors have to be considered on the site (Pillay, 1977). 1. Ecological factors a. Water supply b. Water quality c. Climate d. Hydrological characteristics […]

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