Determining the operating point
In our example we need the pump to displace water 1 m above the water surface. By looking at the pumps performance curve, we can locate the operating point (see example image) you can see the red mark at 1 m in height, that is our operating point and at that point we can see that approx. 90 l/m are displaced - This is determined theoretically as small hose diameter, the hose length, any fittings and built in curvature can change the value of the flow in the extreme.
The delivery head is specified in mwc (metre water column).
1 mwc ~ 0.1 bar