The degradation of freshwater is a key environmental challenge of our time and nutrient enrichment from agriculture is a major contributor. Nutrient losses from farms respond to various factors, including management and climate. Measuring nutrient losses is challenging and cannot capture the entire range of possible conditions that might occur.

Overseer is a model that aims to estimate farm-scale nutrient flows. The Science Advisory Panel have reviewed Overseer to assess whether the current modelling approach gives confidence that Overseer can predict what impact changes in farm management may have on losses of nutrients into water.

In this document, a team of independent technical experts review the Overseer model. This is necessary to assess whether it can confidently be used as a decision support tool and in a regulatory context