Modelling options to assess hydraulic connectivity of agricultural fields
Modelling options to assess hydraulic connectivity of agricultural fields with monitoring wells for edge-of-field groundwater surveillance
Groundwater monitoring for residues of active substances and their metabolites is an important part of the European risk assessment scheme for the authorisation of plant protection products. In case of edge-of-field studies, monitoring wells for sample collection can be placed at various distances to test fields treated with products depending on the purpose and corresponding design of a groundwater monitoring study. A common challenge for the design of monitoring studies and the interpretation of monitoring data is the need to demonstrate that well and filter screen are appropriately placed in order to detect potential residues. This is mainly determined by the hydraulic connectivity which depends on the well’s location, filter placement in the saturated zone, and other environmental factors and properties.
Nils Kehrein1, Wenkui He1, Florian Hegler1, and Robin Sur2
1knoell Germany GmbH, Crop Protection
2 Bayer AG, Crop Science Division, Germany
Event: SETAC Europe 2019, Helsinki, Finland