A Review of the Edwards Aquifer Precipitation Enhancement Program

Rebecca L Resler, Bruce A Boe


The organization and facilities of the Edwards Aquifer Precipitation Enhancement Project (EAPEP) is reviewed, and the resources applied in the 1999, 2000, and 2001 seasons are summarized. A preliminary evaluation of the 1999 and 2000 project seasons suggests a 24% increase in rainfall volume for floating target units of 1,964 km^2 that actually received treatment within the Edwards Aquifer fixed target. This corresponds to an average water increment of 626 acre-feet per unit. The full effect of seeding over the entire target area is presently unknown. The current estimate of the benefit-to-cost ratio is 9:1.

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