Tavo,

Where is your location in Texas? The amount of annual rain to fill the pond is much greater in East Texas than in West Texas.

Also, can you expand your satellite view and topo map view and examine some of the nearby ponds? If you see several ponds that have 10:1 drainage area to pond size that gives you a working estimate. If it is 25:1, then you may have to reduce the size of your pond unless you really want to do a lot of dirt work to direct the surface water flows on your property.