Pond Boss Forums INTRO Questions & Observations Question about water pressure

I have been pondering whether or not to expand my pond. The water level is pretty close to the ground water level and it is fed by 4-5 springs. I didn't own the land when the pond was dug, but the previous owner said that the springs "shot out like a water hose" when they were struck. The deepest part of the pond is 16' when the water-table is at it's high average for the year, and was 13-14' during the dryest part of this past summer. I live in a rural farm area, so irrigation does come in to play with our water table.

I've spent a lot of time in the last month (since I found the forum) reading as much as I can, and I understand the possible advantages and disadvantages of a spring-fed pond and the possible issue of the spring acting as a drain when the pressure of the pond exceeds the pressure of the spring. My question, though, is this: since I live in a sandy soil area and my water level is at the mercy of the water table, am I at any more of a risk of draining if I expand the surface area of the pond? And, is water pressure only a factor of depth, or depth and area? For instance, if I expanded the surface area of the pond but kept the depth at an average of 9-10' would that put any more pressure upon the spring?