The advice I gave is only relevant IF that is the CORRECT diagnosis of the problem! (My background is geology.)

The best way to dry out the pond is very specific to your exact conditions. Use the search function and read some of the threads about cleaning out muck. If nothing is an exact match, then you will at least learn what are the most important factors. You can then start a new thread with an in depth description of your conditions.

That way you might be able to get some good advice for your pond from some of the experts!