b'22Ten years of High Temporal Resolution Water Quality MonitoringRyan D1, Mellander P-E1,2, Jordan P3, Kennedy JG1, Fox I1, Madden K1, Coakley O11Agricultural Catchments Programme, Teagasc, Johnstown Castle Environment Research Centre, Wexford, Co. Wexford, Ireland2Crops, Environment and Land Use Programme, Teagasc, Johnstown Castle EnvironmentResearch Centre, Wexford, Co. Wexford, Ireland3School of Geography and Environmental Sciences, University of Ulster, Coleraine, UnitedKingdom, BT52 1SAThe Agricultural Catchments Programme (ACP) was established in 2008 to include an assess-ment of the Nitrates directive and water quality in Ireland. The experimental design was based in six catchments on differing soil and drainage types and representative of the predominant farming enterprises.As river flows generally respond quickly to rainfall in Ireland the ACP commissioned highresolution data monitoring equipment for synchronous measurement of nutrients and riverdischarges. Instantaneous nutrient concentrations and accurate calculation of loads aremeasured throughout the year and based on the Hach Phosphax sigma and Nitratax equipment. Supporting data include turbidity, conductivity meteorological parameters and groundwaterlevels and quality.Deployment of this instrumentation to help evaluate the Nitrates Directive in Ireland was novelby its nature. It also represented a stepped change in the monitoring of nutrient loss from agricultural catchments over traditional sampling methodologies and strategies.Challenges encountered included farmer stakeholder buy-in, selection of suitable sites,installation of single phase power supply, ground works including access, commissioning of instrumentation and the requirement for hands on learning approach for Technical and Research staff alike to gain required experiential knowledge of instrumentation.Ten years of this high temporal resolution water quality monitoring has provided an improved understanding of catchment science dynamics in relation to nutrient source, pathways, delivery and impactrelated to farm management under the Nitrates Directive.The high temporal resolution monitoring sites also act as hubs for education and stakeholderengagement as data can be viewed in real-time or trends presented that are linked to major weather events and periods of the farming calendar.66'