Stepwise development of catchment hydrology for effect modelling in regulatory landscape-scale aquatic risk assessment

5 May, 2020

The EFSA Guidance Document on Aquatic Risk Assessment (EFSA, 2013) indicates a key role for effect modelling in future aquatic risk characterization in a tiered risk assessment framework. Such approaches require correspondingly adapted exposure tools and scenarios ranging from simple edge-of-field to spatio-temporally explicit landscapescale catchment models. These approaches should be sufficiently flexible and transparent in order to design lower- and higher-tiers of consistent protection levels. On the catchment scale, a hydrological model needs to be set up with explicit locations of fields und streams. Furthermore, the simulation time steps should be in an appropriate
resolution (e.g. 1 h) in order to cover exposure profile resolutions needed for a proper effect assessment. In the present study, a flexible modelling setup using the Catchment Modeling Framework CMF (Kraft et al. 2011) is introduced.

This generic framework allows developing model setups adapted to the data availability for the catchment of interest.
The aim is to produce spatially and temporally explicit calculations of Predicted Environmental Concentrations allowing to analyse effects at the landscape scale for regulatory
aquatic risk assessment.

Do you have questions regarding this topic? Don´t hesitate to contact Florian Krebs.

Event: SETAC Europe, Dublin 2020

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