How to Determine the Frequency of Irrigation Mathematical Problem Following data are given, determine the frequency of irrigation Field capacity of soil = 45 % Permanent wilting point = 19 % Density of soil = 1.5 g/cm3 Depth of root zone = 65 cm Daily consumptive use of water = 18 mm Solution: Available moisture…
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Find the intensity of Rainfall When the duration of Rainfall is Given First of all, we need to know the formula used to determine rainfall intensity. There are three types of empirical formula, they are a) For storm duration 5 to 20 minutes b) For storm duration 20 to 100 minutes c) Where rainfall is…
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How to Determine Runoff by using Rational Method First of all, we need to understand which formula or expression are used for determination of runoff. In rational method, the runoff is given by the following expression: Where, Q = Runoff in cumecK = Coefficient of runoffi = Intensity of rainfall in cm/hrA = Catchment area…
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How to Determine Runoff Coefficient When the nature of the surface of different areas and the impermeability factors of the areas are known or given, then the value of runoff coefficient(K) may be determined by the following expression: Where, a1, a2 = Area of different surfaces.p1, p2 = Impermeability factors of those surfaces.A = Total surface area….
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What is the Spur? Spur is a permeable and temporary structure. These structures are constructed on the curve of a river to protect the river bank from erosion. This type of structure is most suitable where the river carries sediment load in suspension. Don’t be confused about spur and groynes, both are the same type…
Canal Fall – MCQ 1. Ogee curve is a a) Concave curve.b) Convex curve.c) Combination of concave and convex curve.d) None. 2. Montague type of fall is a a) Rapid fall.b) Glacis fall.c) Modified Glacis fall.d) All of these. 3. Vertical drop fall is also known as a) Sarda fall.b) Rapid fall.c) Inglis fall.d) Ogee…
What is Irrigation Efficiency? The amount of supplied water is not fully utilised for the growth of crops because there are several reasons for water loss. Irrigation efficiency is defined as the ratio of the amount of water available to the amount of water supplied from the reservoir. It is expressed in percentage. Different Types…
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