SPATIALLY VARIED STEADY FLOW IN IRRIGATION CANALS

A mathematical model is developed for the analysis of spatially varied steady flow in an irrigation canal. The spatially varied steady flow equations are solved using the finite difference method. The model res ults are verified with the observed water surface profiles available i n literature. The effect of canal seepage, canal condition, turnout fl ows, backwater and drawdown conditions are studied in terms of dischar ge in the canals, performance of turnouts and spatial variability of f low. It is observed that even for design roughness and seepage paramet ers, the actual depth and discharge in the canal is significantly diff erent from the designed ones.