What is the maximum spacing between rock ditch checks related to?

The maximum spacing between rock ditch checks is related to the elevation of the downstream check. This relationship is crucial because rock ditch checks are designed to slow down the flow of water in a channel and reduce erosion and sediment transport. The elevation of the downstream check determines how much energy the water has when it reaches that point. If the checks are spaced too far apart, the water can gain too much velocity and height before reaching the next check, which may lead to localized erosion and inadequate sediment control. Therefore, maintaining an appropriate maximum spacing ensures that the checks can effectively manage runoff while anticipating the elevation differences downstream that can affect flow dynamics.