Abstract: It is well known that in steep channels, the flow becomes unstable when the Froude number exceeds some critical value. Instead of obtaining uniform flow, a short distance from the channel inlet, waves of various lengths, ...

Abstract: The WAVE model describes the transport and transformations of matter and energy in the soil, crop, and vadose environment. A lateral field drainage subprogram was added to the WAVE model to simulate lateral subsurface ...

Abstract: Unsteady flow problems in open channels can be classified as simulation‐ and operation‐type problems, according to the objectives of the study. The simulation problem is for predicting the discharge and water level in the ...

Abstract: A downstream control algorithm was developed for the control of multireach canal systems. The objective of the control is to maintain a target water level at the downstream end of each pool by adjusting the control gate ...

Abstract: A downstream control algorithm for on‐demand operation of irrigation canal systems is presented. A constant water level is maintained at the downstream end of the pool. The approach is based on an explicit finite‐difference ...

Abstract: Some of the highest losses of nitrate to surface waters come from drained agricultural land. This research studied, for Belgian farming conditions, (i) the effect of subsurface drainage density on nitrate losses and (ii) ...