WellTape Drawdown Lab

Know what your well can actually deliver — measured, not remembered. WellTape Drawdown Lab is an offline-first groundwater pump-test workbench. Lower a virtual sounder tape down the casing, run an interval pump test, and walk away with a real specific capacity in gpm/ft plus a safe pump-setting band. SOUNDER-TAPE DEPTH ENTRY Drag the reel tape down a slate casing cross-section. Tick marks click, a haptic "plink" fires at the water line, and release commits the reading in feet or meters with a confirmation card. GUIDED PUMP TEST A 1/5/10/15/30/60-minute interval timer keeps the run honest. Every reading lands on a live drawdown curve with a fitted trend line while the pump runs. SPECIFIC CAPACITY, AUTOMATICALLY Get gpm per foot of drawdown (or L/s per m), a recommended pump-setting band, a drawdown ceiling, and a safety margin against over-pumping the aquifer. RECOVERY TEST Plot the rise back toward static level and compute 1-hour and 24-hour recovery percentages with a pass or weak verdict. WELL CONSTRUCTION RECORD Casing diameter and material, screen interval, total depth, seal and grout type — drawn as a scale cross-section built from your own numbers. MULTI-RUN HISTORY Runs are stored on-device and plotted on a longitudinal water-level trend, so seasonal decline and drought drawdown become visible at a glance. WATER-QUALITY SAMPLE SHEET Offline interpretation rules for pH, iron, hardness, nitrate, and a coliform flag, with plain-language treatment directions. No internet needed. REMINDERS AND WIDGET A home-screen widget plus scheduled reminders: annual test countdown, freeze watch, and a "static level unchanged?" sanity nudge before the season starts. EXPORT A one-page well record (PDF and share sheet) plus CSV of every reading — ready for a driller, a buyer's inspection, or a county water-system file. OFFLINE FIELD LIBRARY Unit conversions, sounder vs air-line vs electric-probe methods, typical yields by aquifer type, wellhead safety, and pump-safety limit cards. WellTape Drawdown Lab is a measurement instrument, not a farm notebook. It works with no signal, keeps your readings on your device, and puts a defensible number behind every pump decision.