A generalised formulation of the mathematical model developed for the analysis of transients in a canal network, under subcritical flow, with any realistic combination of control structures and their multiple operations, has been presented. The model accounts for a large variety of control structures such as weirs, gates, notches etc. discharging under different conditions, namely submerged and unsubmerged. A numerical scheme to compute and approximate steady state flow condition as the initial condition has also been presented. The model can handle complex situations that may arise from multiple gate operations. This has been demonstrated with a problem wherein the boundary conditions change from a gate discharge equation to an energy equation and back to a gate discharge equation. In such a situation the wave strikes a fixed gate and leads to large and rapid fluctuations in both discharge and depth.
KeywordsUnsteady flow open channel networks canal transients
Unable to display preview. Download preview PDF.
- Bos M G 1976Discharge measurement structure (New Delhi: Oxford andIBH)Google Scholar
- Henry R F 1972 Simulation of long waves in branching water ways.J. Hydraul. ASCE 89: 604–629Google Scholar
- Joliffe I B 1984 Computations of dynamic waves in channel networks.J. Hydraul. ASCE 110: 1358–1370Google Scholar
- Kan A O A, Yen B C 1981 Diffusion wave flood routing in channel network.J. Hydraul. ASCE 107: 719–732Google Scholar
- Price R K 1974 Comparison of four numerical methods for flood routing.J. Hydraul. ASCE 100: 879–899Google Scholar
- Ramakrishnan C R 1979Flow characteristics of rectangular and trapezoidal finite crested weirs and triangular profile weirs, PhD thesis, Indian Institue of Science, BangaloreGoogle Scholar