Ex 4-1: The field capacity and wilting point as depth equivalent of soil are178mm and 102 mm respectively, calculate the irrigation interval if the waterconsumptive use is 5.3 mm/dayT1

The irrigation interval is calculated by determining the amount of water available in the soil for…

Answered: Ex 4-1: The field capacity and wilting…

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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Ex 4-1: The field capacity and wilting point as depth equivalent of soil are 178mm and 102 mm respectively, calculate the irrigation interval if the water consumptive use is 5.3 mm/day atent by
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Q1 B: For a project the following data were measured on 20th of January morning: soil moisture content at field capacity 38%, soil moisture content at permanent wilting point 18%, initial water content 26%, root zone depth 90cm, plant consumptive use (cu-4mm/day). On 25th of January an effective rainfall of 10mm took place on the field. On 28th January evening, gross depth was applied in order to have a full irrigation. Runoff losses was 10% of net depth. Find initial water content on 31th of January. If the farm total area is (60 ha), find water duty in (N.Donum/G. m/sec) (35 marks)
TQ2]// [A]: Given; the following data for an irrigated field. - Field capacity =20%) by wt. - Wilting point=10%) by wt. - Percentage of allowable depletion of available moisture content =65% - Effective rainfall = 20 mm. - Apparent specific gravity of the soil =1.5. Determine the net irrigation requirement per meter depth of soil. [B]: Prove that: Pw x 100 Pww Pw + 100
Q#2 The moisture holding capacity of the soil in a 100-hectare farm is 18 cm/m, the field is to be irrigated when 50% of t'ne available moisture in the root zone is depleted. The irrigation water is to be supplied by a pump working for 10 hours a day, and water application efficiency is 75%. Details of crops planned for cultivation area are as follows: Root z'one depth (m) Peak rate of moisture use (mm/day) 5 4 Crop X Y Solve for 1) The capacity of irrigation system required, to irrigate crop X in 36 hectares. 2) The area of crop Y that can be irrigated when the available capacity of irrigation is 40 L/s. 1 0.8
Third Stage Irrigation and Drainage Exgincring Group D: Qr: The water content at the field capacity is 27.2% by weight and it was 19% by weight for irrigation (wilting point), depth of the root zone is 0.92m and the apparent specific gravity is Mr. Maarnar ALTau 1.3. Find: 1. The depth of water required to reach moisture in this soil to its field capacity. 2. The time required to irrigate 12 mishara in discharge equal to 75 /s and 65% the efficiency of irrigation (Ea).
Alluvial soil with a depth of (1.3mm) weighs (2.9) and its dry weight (2.5N). Knowing that the field capacity of the soil (35 kg), its wilting point (10 kg), bulk density As (14). Find 1- Total available water (mm) 2- The actual depth of water to be added as irrigation water depth (mm).
.---. A stream of 150 litres per second was delivered from a canal and 110 litres per second were delivered to the field. An area of 2.2 hectares was irrigated in eight hours. The effective depth of root zone was 1.5 m. The runoff loss in the field was 445 m The depth of water penetration varied linearly from 1.5 m at the head end of the field to 1.1 m at the tail end. Available moisture holding capacity of the soil is 200 mm per metre depth of soil. Determine the water conveyance efficiency, water application efficiency, water storage efficiency, and water distribution efficiency. Irrigation was started at a moisture extraction level of 50%
Dr. Masumer ALTus Q: The water content at the field capacity is 27.2% by weight and it was 19% by weight for irrigation (wilting point), depth of the root zone is 0.92m and the apparent specific gravity is 1.3. Find: 1. The depth of water required to reach moisture in this soil to its field capacity. 2. The time required to irigate 12 mishara in discharge equal to 75 t/s and 65% the efficiency of irrigation (E.).
1. In a 5 ha area, it was determined that the soil volumetric field capacity and permanent wilting points are 25% and 15% respectively. Crop consumptive use is 5mm/day, application efficiency is 80% and irrigation application rate is 32m^3/hr. The allowable soil moisture depletion is 60%, apparent specific gravity is 1.2 and the depth of rootzone is 0.8m. Determine the following: (5 points each) a. Net depth of irrigation water to be applied b. Gross depth of irrigation water to be applied C. Irrigation interval in days d. Irrigation period in hours
a. What factors affect soil moisture stress? b. Aside from methods previously discussed, can you suggest other methods or techniques which can be used to identify moisture stress? c. Why is crop yield reduced when soil is too wet or too dry? d. 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. e. 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?
IQ2]// [A]: Given; the following data for an irrigated field. - Field capacity =20%) by wt. - Wilting point=10%) by wt. Percentage of allowable depletion of available moisture content =65% - Effective rainfall = 20 mm. Apparent specific gravity of the soil =1.5. Determine the net irrigation requirement per meter depth of soil.

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Ex 4-1: The field capacity and wilting point as depth equivalent of soil are 178mm and 102 mm respectively, calculate the irrigation interval if the water consumptive use is 5.3 mm/day T 1