[Q2]// [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. %3D

[Q2]// [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. %3D

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The soils, land use, and hydrologic conditions for a 500-hectares watershed are as follows: Soil Subarea Land Use Treatment and Hydrologic Hectares Condition Group 100 C Residential 25% imp 200 A Commercial and business 100 D Cultivated Straight Row, good condition 100 B Forest, dense The hydraulic length of the watershed is 1500 m and the mean slope is 0.05%. During the growing season, 25 mm and 15 mm of rain fell on the 1st and 2nd day of the month, respectively. A critical duration of storm causing flood of 3 hours with return period of 10 years resulted to 75 mm of precipitation fell on the 6th day. The AMC on the last day of the previous month was 50 mm and the value of CA is O.80. Compute the AMC of the 7th day of the month. determine the run off volume (in cu.m) for the flood on the 6th day using CN method. Use la =0.2S, Determine the peak run off rate using CN method
Following data are given: 1. Available moisture holding capacity of soil-12.5cm/m depth of soil 2. Root zone depth of crop=0.8m 3. Consumptive use=5mm/day If moisture depletion is allowed to 50% of available moisture then the frequency of irrigation will be ___days.
Sugar cane (root zone depth 1.8 m) is grown in a particular area where the ground water table is 2.0 m below ground. If the size of soil pores is 0.08 mm in diameter and surface tension, o = 0.054 N/m, is the field waterlogged.? If so, determined the vertical location of closed drains below ground spaced at 15 m. Take drainage coefficient as 0.16 cumecs/km², coefficient of permeability as 106 m/s and the impervious stratum to occur at 7.0 m below ground. Assume the capillary rise from ground water table not to interface with the 40 cos 0. root zone of plant. (Hint: capillary rise (H₂) = Ywd
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
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?
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
Water flowing at a rate of 10 m3/s is diverted to a 32 Ha field for 4h. Soil probing often irrigation showed that 0.3m of water had been stored in the root zone. Water application efficiency in this case would be :
The water content in a field has to be increased from 14% to 21%. The density of soil in the field is 1.4 g/cm3 and the effective root zone is at a depth of 76cm. Determine the required depth of water to be irrigated.