Pump for cleaning out pond

I use a shop vac to suck the yuck off the bottom of my pond, but it fills up
in about nine seconds flat, and then I have to dump it and start over, a
tedious and tiring process. What I want is a pump with a hose or wand on
one end to suck mucky water from the bottom, and a hose on the other end to
deposit it where I want it. I guess it might be a small version of the
industrial pumps used to drain water from flooded areas. Does anyone know
about such a thing?

Thanks,
Harriett