A field has a capacity of 24% and its current moisture content is 18%. The density of soil is 1.25 g/cm³ and the water used for irrigation has a density of 1.0 g/cm3. Determine the depth of water required to be irrigated to reach the field capacity if the depth of effective root zone is 67 cm.

A field has a capacity of 24% and its current moisture content is 18%. The density of soil is 1.25 g/cm³ and the water used for irrigation has a density of 1.0 g/cm3. Determine the depth of water required to be irrigated to reach the field capacity if the depth of effective root zone is 67 cm.

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

A stream of 150 l/s was delivered from a canal and 120 l/s were delivered to the field, which is an area of 3.6 ha usually irrigates from 8 AM to 6 PM. Effective depth of root zone was 1.8 m. The runoff loss in the field was 550 m³. The depth of water penetration is varying from the head end of the field to the tail end as shown in the sketch below. Available moisture holding capacity of the soil is 50 cm for the total depth of soil. Determine water conveyance, water application, water storage, and water distribution efficiencies. The irrigation was started at a moisture extraction level of 65% of the available moisture. 1.8 1.7 1.65 1.5 1.46 + Head end 1.4 1.35 + Tail end
A stream of 160 litres per second was diverted from a canal and 120 litres per second were delivered to the field. An area of 1.5 hectares was irrigated in 9 hours. The effective depth of root zone was 1.7 m. the runoff loss in the field was 420 cumec. The depth of water penetration varied linearly from 1.7 m at the head end of the field to 1.1 m at the tail end. Available moisture holding capacity of the soil is 24 cm per metre depth of soil. It is required to determine the water conveyance efficiency, water application efficiency, water storage efficiency, and water distribution efficiency. Irrigation was started at a moisture extraction level of 45% of the available moisture. A = 8646
Urgently need the solution: The water content of a field soil is to be increased to 21% from existing 14%. The density of soil is 1.4 g/cm3 and the depth of effective root zone is 76cm. Calculate the required depth of water to be irrigated.
A crop field has an effective root zone at a depth of 0.5 m. The soil of field has a water content of 20% and density of 1.6 g/cm³. If the water content of the soil is to be increased to 40%, what should be the depth of water that needs to be irrigated?
The moisture content of a soil is to be increased up to the field capacity of 28% from 21% through irrigation of the field. Determine the depth of water to be irrigated (in mm) if the effective root zone is at a depth of 70 cm. Take density of soil as 1.3 g/cm3 and that of water as 1.0 g/cm3.
Determine the soil loss for a field at your present location if K = 015, l = 91 m, s = 10 percent, C = 0.20 and upslope and downslope farming is practiced. What conservation practice should be adopted if the soil loss is reduced to 7 Mg/ha. Show complete solution.
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
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
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.
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. -
6. The soil moisture at field capacity is 27.2% and the moisture content at the time of irrigating is 19.0%. The As is 1.3 and the depth of soil to be wetted is 1.0 m. a. How many ha-mm ha' of water must be applied? b. How long will it take to irrigate the 5 ha with 115 li sec stream?
A stream of 135 L/s was diverted from a canal and 100 L/s were delivered to the field. An area of 1.6hectares was irrigated in 8 hours. The effective depth of root zone was 1.8 m. the runoff loss in the fieldwas 432 m3. The depth of water penetration varied linearly from 1.8 m at the head end of the field to1.2 m at the tail end. Available moisture holding capacity of the soil is 20 cm per meter depth of soil.Irrigation was started at a moisture extraction level of 50 percent of the available moisture. Determine;a. The water conveyance efficiencyb. The water application efficiencyc. The water storage efficiencyd. The water distribution efficiency