Dear Sir Greetings to all !
In a contour canal of 49.20 km length,we have four interstate gauging points viz 0.165km,12.56 km,25.10km.,49.20 km Entire canal has intercepted catchment during rainfall seasons.one outlet is there above 12.56 km which will supply that water to a dam.while taking water through outlet back water effect will be for 3kmThe canal loss is 3%..In this condition. we are gauging @ 12.56 & 25.10km (during non raifall period). to calibrate chart But the discharge @ 25.10 is lower than 12.56km we are working out in a ordinate method using cup currentmeter. velocity is 1.5m/sec. we are iterating taking gauging.how to fix it sir.