A cement lined rectangular channel 6m wide carries water at the rate of 30m3 /s. Find the value of Manning’s constant, if the slope required to maintain a depth of 1.5m is 0.00118.

1. A gravity dam with a trapezoidal section, as shown in the figure. A distance of 15 meters from the toe, a drain is located. Which point has a pressure due to uplift of zero and increasing uniformly to full hydrostatic at the heel. Upstream face 1H:5V, while downstream face is inclined 1H:2V. Determine the maximum foundation pressure EL 50m 1 1 7m EL 52m AA 9 T साझाल Drain hard EL.0 3. ar TH th re

A 6-m-wide rectangular irrigation channel carries a discharge of 20.0 m3/sec. The channel has aslope of 0.02 and a Manning’s coefficient is n = 0.01. Determine the normal depth. Use both thefull expression of the hydraulic radius and the wide channel approximation. a) Assume wide channel and compute the normal depth as the slope decreases from 0.02down to 0.002 at increments of 0.002. Compute also the corresponding water speed.Plot the normal depth as function of the slope. b) Assume wide channel and compute the normal depth as the Manning’s coefficientincreases to 0.1 at increments of 0.01. Compute the corresponding water speed. Plot thenormal depth as function of the Manning’s coefficient.

water flows at 12m^/s in a concrete trapezoidal channel n=0.015 bottom width 4m side slopes 2H:1V longitudinal slope = 0.0009.if the depth flow at a gauging station is measured as 0.8m use the direct step method to find the location where the depth is 1.0m