Estimate the depth and frequency of irrigation required For a certain crop, given: Assume 50% depletion of available moisture as the indicator to began application of irrigation water. Root zone depth : 90 cm Field capacity: 22% Wilting point : 12% Apparent sp. gr. of soil: 1.5 Consumptive use : 22 mm/day Efficiency of irrigation : 60%

Estimate the depth and frequency of irrigation required For a certain crop, given: Assume 50% depletion of available moisture as the indicator to began application of irrigation water. Root zone depth : 90 cm Field capacity: 22% Wilting point : 12% Apparent sp. gr. of soil: 1.5 Consumptive use : 22 mm/day Efficiency of irrigation : 60%

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Determine the area which can be irrigated using surface method of irrigation with a source of water having a discharge of 1 meter cube per minute. The available moisture holding capacity of the soil is 180mm per meter and depth of root zone is lim. Imigation is done when 40% of available moisture is used. The total losses during irrigation are 35% and peak daily moisture use is 4.5mm
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Assuming that field capacity is 28%, determine the irrigation water depth required, when soil moisture is found to be 10% before irrigation. Assume root zone depth = 0.50 meter. If consumptive use rate is 4 mm/day and effective rainfall is on the average 1.5 mm/day, what is the interval of irrigation
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