Optimal Cutting and Filling Height for Canal Length

Transfer canals convey the water from source to destination for further use downstream. Canal runs in partial or complete cutting, filling or combination of both when the natural slope and canal slope are not same. If the canal runs only in excavation it leads to construction-related problems. Similarly if the canal is in-filling then huge quantity of borrow earth is required from borrow area near the canal. To eliminate these practical problems this paper presents the analytical solution of the balancing depths for canal section as well as canal length. The optimal cutting and filling depth is calculated from the earth-balancing section as well as for the whole length of those canals other than contour canals. For this analysis the parabolic section is considered for a given flow. The solution will eliminate the practical problem of dumping of huge quantity of earth generated from canal construction or borrowing a huge quantity of earth for canal construction.