Caroline,
I attended an "open gate" event at Circle Ranch in Van Horn, TX,
Circle Ranch TX a few weeks ago and the owner stated that many of their tanks/ponds were no longer getting enough water to fill up after the land above them was keyline ripped. He did not regret that however because the water is much more valuable in the ground up high in the land form. As the grasses respond and the hydrology of your soil begins to improve a plume of moisture should begin to form under the grasses which will slowly move down slope in the land form.
Also, remember that not all rains come equally. What I mean is every year you will get rains that come faster than your soil can take it in -- so you will have run off. That surplus water is what your tank/ponds can catch and retain. What I am saying is with keyline ripping it might take longer to get a "permanent water level" pond than otherwise, but I don't think you have to look at it as an EITHER -- OR situation.
Hope this helps your thinking.
Kevin