Abstract: For a given level of irrigation uniformity there is a trade‐off between the amount of water applied and the area that receives some target amount of water. If the distribution of infiltrated depth is known (e.g., a normal ...

Abstract: Providing water to users on demand usually requires an increase in canal capacity over the same volume of water delivered at a uniform rate. A simulation model was used to develop demand patterns for hypothetical surface ...

Abstract: This paper presents a method for describing and evaluating some of the major factors that cause nonuniformity in surface irrigation systems. Methods including the following are presented for statistically combining these ...

Abstract: The operation of main irrigation canals is complicated in situations in which the operator does not have full control over the canal inflow, or in which there are very long transmission distances from the point of supply, ...

Abstract: Kinematic-wave models of surface irrigation assume a fixed relationship between depth and discharge (typically, normal depth). When surface-irrigation inflow is cut off, the calculated upstream flow depth goes to zero, ...

Abstract: By appropriate choice of reference variables, dimensionless governing equations and initial and boundary conditions of unsteady canal flow have fewer independent parameters that do their dimensioned counterparts; the same ...

Abstract: Researchers have developed several algorithms to automatically control water levels in irrigation canals. Proportional-integral (PI) control logic has been used for downstream water-level control, but its performance has ...

Abstract: A number of delivery sites within an irrigation district were monitored in order to determine the amount of variability in flow rate during each water delivery. The coefficient of variation (CV) of instantaneous (1/2 hour) ...