Management Challenges In Shallow Alluvial Aquifers

Shallow alluvial aquifers are often considered inferior groundwater resources primarily because of their limited water storage and close proximity to surface contamination. The water quality is often difficult to protect and the saturated section may not be adequate when needed most. However, the potential for contamination from surface activities is tied directly to the potential for significant recharge making these aquifers good candidates for sustainable groundwater management. Unfortunately, impacts to shallow alluvial aquifers near urban centers due to inadequate management and neglect have produced significant challenges for sustainable use. The Brazos River Alluvium aquifer in central Texas exemplifies many of the possible impacts and subsequent challenges common to shallow alluvial aquifers. Mining, landfills, impervious surfaces, bank filtration, conjunctive use and decreased stream flows could all potentially affect the groundwater in the Brazos River Alluvium aquifer near Waco, Texas.  Simply identifying the problems does not usually lead to sound solutions. It is critical to quantify the aquifer characteristics and develop sound hydrogeological information to guide the needed policies. It is also crucial to quantify and monitor the impacts as policies are implemented. Baylor University has been working with stakeholders and management agencies such as local cities, counties, and groundwater management districts in order to provide “Best Management Knowledge” (BMK). These efforts include class projects, workshops and internships. A summary of the trials, successes, failures and recommendations are presented in an effort to aid others in the improvement of sustainable management in shallow alluvial aquifers.