aaron, if you can post a topo of yer pond site and surrounding area, folks here can help you. you need to be able to read the topographic contour lines (hills, valleys, divides) yer watershed will be the entire area sloping towards yer pondsite.
if yer springs are relatively small, a quick and dirty estimate of flow volume can be obtained w/ a 5-gallon bucket....funnel the spring water to a deep spot (maybe have to dig a little) stick the bucket in and time how fast it fills..convert to gallons per minute.
