Thus in the case of a low-density development, where attention has been paid to landscaping with indigenous natural vegetation, where the likelihood of nutrient-enriched runoff into the system is low, as a result of internal policies that limit the application of fertilizers and the over-irrigation of planted areas, recommended buffer areas should be substantially less than in cases where similar types of receiving water bodies are impacted by high-intensity developments associated with a large area of hardened surface relative to total size and a high likelihood of generating polluted runoff (e.g. from car parks, irrigated and fertilised planted areas or lawns, or direct discharge of contaminated stormwater).