A GIS policy approach for assessing the effect of fertilizers on the quality of drinking and irrigation water and wellhead protection zones (Crete, Greece)
National policy system for assessing groundwater quality status, a case study in one of the most intensively cultivated area of Greece. Development of a Fertilizer Water Pollution Index (FWPI). Monitoring drinking and irrigation wells data. Estimation of groundwater flow direction and seepage velocity. Accurate delineation of wellhead protections zones.