Subject soil Mechanics An unlined irrigation canal has been aligned parallel to a river, as shown (next page). Thiscross-section continues for 5.25 miles (length of irrigation canal).The predominant soils are generally clayey soils with extremely low permeability, but thegeotechnical engineer realized that a 6 in thick sand seam is present as shown (thicknessperpendicular to the flow).The sand has a hydraulic conductivity of 8.2 x 102 cm/sec.(A) Compute the water loss from the canal to the river due to seepage through this sandlayer and express your answer in acre-foot per month.Note: One acre-foot is the amount of water that would cover one acre of ground toa depth of one foot, and thus equals 43,560 ft.(B) How high should the river rise (elevation with respect to the undisclosed datum) toreduce the water loss in half?el. 187 ftCanalSand seam500 ftClayClayel. 121 ftRiver

Answered: Image /qna-images/answer/3cb0d970-1bcc-4036-9c26-d163293fcee5.jpg

An unlined irrigation canal has been aligned parallel to a river, as shown (next page). This cross-section continues for 5.25 miles (length of irrigation canal). The predominant soils are generally clayey soils with extremely low permeability, but the geotechnical engineer realized that a 6 in thick sand seam is present as shown (thickness perpendicular to the flow). The sand has a hydraulic conductivity of 8.2 x 10 cm/sec. (A) Compute the water loss from the canal to the river due to seepage through this sand layer and express your answer in acre-foot per month. Note: One acre-foot is the amount of water that would cover one acre of ground to a depth of one foot, and thus equals 43,560 ft.

An unlined irrigation canal has been aligned parallel to a river, as shown (next page). This cross-section continues for 5.25 miles (length of irrigation canal). The predominant soils are generally clayey soils with extremely low permeability, but the geotechnical engineer realized that a 6 in thick sand seam is present as shown (thickness perpendicular to the flow). The sand has a hydraulic conductivity of 8.2 x 10 cm/sec. (A) Compute the water loss from the canal to the river due to seepage through this sand layer and express your answer in acre-foot per month. Note: One acre-foot is the amount of water that would cover one acre of ground to a depth of one foot, and thus equals 43,560 ft.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

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