SHORT- AND LONG-TERM SUSTAINABILITY OF THE EDWARDS AQUIFER IN CENTRAL TEXAS, USA

Nearly three million people in central Texas rely on the Edwards Aquifer for their livelihoods. However, potential threats to this valuable water resource stem from regional population growth, which would increase water use, and global climate change, which is anticipated to introduce greater extremes, variability, and uncertainty in weather patterns. The Edwards Aquifer’s karstic nature conveys both strengths and weaknesses to its resilience to these potential threats. On one hand, the long-term sustainability of the aquifer is promising due to the sub-humid climate and ability of the aquifer to recharge significant quantities of water rapidly during periods of heavy precipitation. Conversely, more frequent or prolonged periods of drought could lead to reduced water availability from the aquifer. Another significant threat to the Edwards Aquifer is the potential degradation of its water quality. Ill-advised and unfettered development over the source area for the aquifer’s recharge could degrade the quality of water in the aquifer due to introduction of potential contaminants associated with development. The short- and long-term sustainability of the aquifer depends on implementation of science-based regulations, management practices, and development strategies designed to protect this valuable resource.