Now that they're digging in earnest, and the water is starting to get in the way, they dig a deeper hole in the middle. This is for several reasons. To get more fill, to create a pocket for the water to recede and make it easier to dig the rest, and eventually in the hope of breaking through the hard pan layer so more water will flow into the pond.
This was the hardest thing for me to get my tongue around when I first started looking into a pond. I did internet searches and gots oodles of information - about Nothern ponds. and how they seal them with clay or a liner, and how to caluculate the runoff that will fill the pond. Well, things don't work that way down here. The land is flat, so there is essentially no runoff. There are no streams or springs. There is just the water in the ground. If you seal the pond, it would stay empty except for a little water from rainfall. We have to break through and create the world's biggest "leak" so the water can leak into our pond.
This was the hardest thing for me to get my tongue around when I first started looking into a pond. I did internet searches and gots oodles of information - about Nothern ponds. and how they seal them with clay or a liner, and how to caluculate the runoff that will fill the pond. Well, things don't work that way down here. The land is flat, so there is essentially no runoff. There are no streams or springs. There is just the water in the ground. If you seal the pond, it would stay empty except for a little water from rainfall. We have to break through and create the world's biggest "leak" so the water can leak into our pond.