Problem 3: A long channel of rectangular cross-section with width 4 m and stream wise slope 1 in 800 carries a discharge

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Problem 3 A Long Channel Of Rectangular Cross Section With Width 4 M And Stream Wise Slope 1 In 800 Carries A Discharge 1 (34.66 KiB) Viewed 39 times

Problem 3: A long channel of rectangular cross-section with width 4 m and stream wise slope 1 in 800 carries a discharge of 15 m3s-1. Manning's n may be taken as 0.016 m-1/3s. A broad-crested weir of height 0.7 m is constructed at the centre of the channel. Determine: (a) the depth far upstream of the weir; (b) the depth just upstream of the weir; (c) whether or not a region of supercritical gradually-varied flow exists downstream of the weir.