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A Farmscale E. coli Model for Gisborne District Council

Publication date:  June 2017
Publication reference number:  CR 277

The nationally-significant swimming sites at Rere Falls and Rere Rockslide on the Wharekopae River in Gisborne do not meet national guidelines for swimming water quality. Previous work by the Gisborne District Council (GDC) had identified that the key source of faecal contamination in the river was from ruminant animals and the catchment land-use is predominantly low intensity sheep and beef farming.

GDC approached AgResearch to develop a model of the cost-effectiveness of appropriate mitigation options that could be implemented on farm to address the issue of faecal contamination (as indicated by the presence of E. coli) of the river. GDC wanted a model that would be flexible so that it could be applied in other catchments in the region.