Calling: Earth.

                                  Mark Rains, the Director of the USF School of Geosciences, discusses his research into water flow and the impact of its relationship to current federal and state legislation. More about Mark can be found here: https://works.bepress.com/mark-rains/ Calling: Earth is a production of the USF Libraries in cooperation with the USF School of Geosciences. Questions, comments, and any other feedback can be directed to callingearth@usf.edu.