Your pump sounds`awful big at 1 HP. I moved lots more water than that
with a 1/2 HP shallow well pump. A smaller pump with a bigger hose or
more hoses is the way to go. But since you already have the pump, I
would use it till it croaks. But I WOULD add a couple of hoses, within
limits, the more water the better. Put a manifold on the pump, connect
all the hoses to the manifold. Do the same on the suction so you don't
starve the pump.

Stretch