Texas A&M University - Corpus Christi (TAMU-CC) will study the contribution of groundwater inputs to decreased marine alkalinity in Copano Bay. TAMU-CC will quantify groundwater discharge and reduced sulfur export on a seasonal basis in selected groundwater discharge sites and construct the relationship between alkalinity drawdown and acid export using biweekly surveyed surface water data. Project results will help resource managers to direct appropriate resources for restoration purposes to combat alkalinity loss and maintain healthy ecosystem functions in environmentally sensitive estuaries.