A zone of influence is the approximate topographic area which may have an impact of the water quality at a bathing water due to surface run-off from rivers or streams particularly after heavy rainfall.Datatype for use in typed skos:notationsA skos:notation sub property carrying datatyped notations that code zone of influence spatial-objectsA reusable property of associating some thing, typically a bathing water, with a zone of influence spatial object.1001