Lateral structure of uniform flow

The concept of uniform flow is traditionally associated with a cross-section-integrated description of channel flow. In some analyses of flow in wide channels, it may be appropriate to adopt a depth-integrated description. The ensuing lateral structure of the depth-integrated flow is investigated at uniform flow. The steady state ordinary differential equation for the lateral structure is established, along with the formulation as a boundary value problem. An integral part of the formulation is the relationship between the channel resistance models for cross-section-integrated and depth-integrated descriptions, respectively. Predictions are shown for a rectangular channel and for an irregular channel.