This layer shows aquifer hydraulic conductivity for cropland areas in Maryland, representing the 'A' parameter in the GALDIT groundwater vulnerability index. GALDIT evaluates vulnerability based on six parameters: groundwater aquifer type (G), aquifer hydraulic conductivity (A), groundwater level above sea level (L), distance from shore (D), impact of present chloride content (I), and aquifer thickness (T). Each parameter is mapped and scored individually, and the results are combined to produce an overall vulnerability index. Hydraulic conductivity, measured in meters per day (m/day), describes the rate at which water moves through aquifer material and is classified into ranges from less than 5 to greater than 80 m/day.
- Source: University of Maryland (UMD)