Schematic of groundwater flow (IMAGE) University of Hawaii at Manoa Caption A schematic representation of groundwater flow patterns. Besides natural recharge and seawater intrusion, anthropogenic effects including groundwater withdrawal and altered recharge and flow patterns due to built infrastructure, as well as augmentation by wastewater effluent injection, leakage from wastewater infrastructure (sewer lines, cesspools, septic tanks) and irrigation (agriculture and landscaping) affect the magnitude and composition of SGD. Credit Illustration by Brooks Bays, SOEST Publication Services. Usage Restrictions Image may only be used with appropriate caption and credit information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.