Dr. Todd Halihan is an Assistant Professor for the School of Geology at Oklahoma State University. His expertise includes site characterization and monitoring of karstic and fractured aquifers in both the U.S. (Missouri, Oklahoma, Texas, and Wisconsin) and abroad (Australia, Bahamas, and South Africa). He has developed several new tools for the analysis of these aquifers, including well analysis techniques and modeling of aquifer flow properties across a range of spatial scales. These methods include hydraulic and geophysical techniques that make use of GPR (ground penetrating radar) and Electrical Imaging techniques.