CAD-DRASTIC: chloride application density combined with DRASTIC for assessing groundwater vulnerability to road salt application

摘要: Road salt is pervasively used throughout Canada and in other cold regions during winter. For cities relying exclusively on groundwater, it important to plan minimize the application of accordingly mitigate adverse effects high chloride concentrations water supply aquifers. The use geospatial data (road network, land use, Quaternary bedrock geology, average annual recharge, water-table depth, soil distribution, topography) DRASTIC methodology provides an efficient way distinguishing salt-vulnerable areas associated with groundwater wells, aid implementation appropriate management practices for road urban areas. This research presents a GIS-based accomplish vulnerability analysis 12 municipal wells within City Guelph, Ontario, Canada. density (CAD) value at each well calculated related measured further combined media aquifer vadose- saturated-zone properties DRASTIC. approach, CAD-DRASTIC, more accurate than existing mapping methods can be by municipalities managers improve protection application.