online_pump_pipe_system:  Operating discharge and head in a pump-pipe system Definition sketch of a pump-pipe system This online script calculates the operating discharge and head for a given hydraulic pump-system combination. The following hydraulic variables are specified as input: Pipe diameter D Pipe length L Friction factor f Upstream reservoir elevation E1 Downstream reservoir elevation E2 Entrance loss coefficient Ke Exit loss coefficient KE Sum of bend loss coefficient(s) [one or more bends] Kb The script uses these values to calculate the values of a and b in the system curve   H = a + bQ2 The pump head-discharge relation is specified in one of two ways: Theoretical:  An equation of the form  H = c - dQ2, where c and d are specified as input; or Practical:  The number of values N in the arrays of pump head H and discharge Q relation (pump curve), followed by the array of H and Q. Please note that the Q array (the independent variable) should increase monotonically, from small to large. The script calculates the intersection of the two curves in the H-Q plane, and reports the corresponding Q and H as operating discharge and head. Thank you for running online_pump_pipe_system.   [160608 22:45]