Measured groundwater levels and geochemical data require interpretation to estimate flow directions, flow paths, and water-level changes that define hydrologic conditions in a study area. Local flow directions are estimated using simplified potentiometric surfaces as defined by measured groundwater levels. Water chemistry data provides additional insights for refining flow-path interpretations that are ambiguously defined by available potentiometric data. The effects of pumping are estimated and projected from rates of groundwater-level change in wells. These common hydrologic problems are addressed in three Excel workbook applications; KML_3Point-Flow, Piper & Stiff, and Slope Finder TOOL that will be demonstrated during a 1-hour webinar. Each tool’s required data, use, functionality, outputs, and interpretation will be illustrated using practical examples.
Instructors:
Keith Halford, Halford Hydrology LLC
Phil Gardner, US Geological Survey