Wigton didn't flood

A couple of days before Christmas, we heard reports that Station Road had flooded. It had been raining AGAIN for a long time. Fortunately the reports were wrong. The Wiza was still 1 metre below road level. A constant stream flow exerts a force on an object by applying Newton's Second Law in this way: instead of F=d(mv)/dt which is rate of change of velocity, write F = v.dm/dt because the velocity of the stream is constant. So force = velocity x mass flow rate. Look what happens when the stream hits the inflow from the side pipe. The incoming mass of water has enough inertia to stop the flow down the right hand side of the stream. The force as calculated above is enough to bend the incoming flow into the correct direction. The water was heavily silt-laden and angry that day but the water is pollution-free and supports Kingfishers and Dippers.