Subsurface Total Piped Load

The total piped load is the total load leaving a node, and is calculated by summing all of the contributing loads: intercepted surface load, subsurface piped loads, and subsurface external loads. For nodes where there are no surface loads or external loads entering, the total piped load is equal to the sum of subsurface piped loads (upstream).

Note: The rational component of the total piped load will be based on the overall controlling time, which is the largest of the upstream system time, the intercepted load time of concentration, or the external load time of concentration.