TopoFlow-Channels-Diffusive Wave

This process component is part of a spatially-distributed hydrologic model called TopoFlow, but it can now be used as a stand-alone model. It uses the "diffusive wave" method to compute flow velocities for all of the channels in a D8-based river network. This method includes a pressure gradient term that is induced by a water-depth gradient in the downstream direction. This means that instead of using bed slope in Manning's equation or the law of the wall, the water-surface slope is used.

此过程组件属于名为TopoFlow的空间分布式水文模型的一部分，但现已成为一个独立的模型。该模型采用“扩散波”方法计算基于D8河网中所有水道的流速。该方法包含由下游方向水深梯度诱导的压力梯度项。这意味着在Manning方程或壁面定律中，不再使用河床坡度，而是采用水面坡度。