The bed of a canal is lowered in case of

Related MCQs

• For a canal which irrigate the area directly, the fall should be provided at a location where the F.S.L. outstrips the gound level, but before the bed of the canal comes into filling.
• When the levels are such that the F.S.L. of the canal is much above the bed level of the drainage trough, so that the canal runs under syphonic action under the trough, the structure provided is known as
• If the R.L's of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be
• When the full supply level (F.S.L.) of the canal is much below the bed level of the drainage trough, then the cross drainage provided is called syphon aqueduct.
• A sudden fall of level of ground along the alignment of a canal joined by an inclined bed is called a
• When the bed level of the canal is higher than the highest flood level (H.F.L.) of the drainage, then the cross drainage work is said to be
• The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in
• A canal aligned roughly at right angles to the contours of the country is called ridge canal.
• The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is
• If D is the depth of scour below original bed, then the width of launching apron is generally taken as