The Wendon catchment runs from the headwaters down through mid-slopes to the lower flats, a mix of rolling hill country and lowland farms that drain a patchwork of arable, forestry, sheep, beef and dairy land into the local streams. The relationship between landscape and land use means the catchment faces issues like erosion, sediment and nutrient run-off, while also containing pockets of native bush, wetlands and important stream habitat.