Projects that occupy much of Andy’s time these days involve development of tools and methods to develop and run managed aquifer recharge (MAR) systems, to simultaneously benefit both water supply and water quality objectives. Enhancements to water supply will help to reduce groundwater overdraft, contributing to reductions in the extent of subsidence, seawater intrusion, loss from critical surface reservoirs (including streams, lakes, and wetlands), and associated damage to fragile and valuable ecosystems. MAR operations can be run as part of a regional strategy, generating significant benefits to water managers, regulators, stakeholders, and aquatic ecosystems by shifting resource use patterns on the basis of (often unpredictable) availability; this characteristic will become increasingly important in coming decades as climate changes force modification of resource availability and use patterns. Many studies of MAR systems have focused on physical aspects of their operation, particularly causes and impacts of clogging. We are also working on quantitative reduction to nitrate loads during MAR, and evaluating links between microbial activity and nitrate removal. Improvements to water quality during MAR operations have been documented in a few cases, but mechanisms and controls on associated processes are poorly understood. We are also completing a regional mapping and modeling study of potential to link stormwater collection with MAR, and are developing new field sites where this approach can be applied and benefits can be verified. These projects apply novel technologies and techniques, connect UCSC to the broader community, and provide opportunities for training of the next generation of water resource specialists. Fisher has also collaborated on studies of submarine groundwater discharge, relations between river flooding and wetland enhancement, quantifying rates of surface-subsurface exchange below streams, and links between sediment load and reductions in groundwater recharge.