River Gauge Station Inspection Logger
Stream gauge site checks — intakes, stilling well, staff plates, datum, sensors, telemetry and channel changes; offline + GPS.
New gauge station inspection
Site visits per program (6–8 weeks typical, monthly in flood season); after every major flood, immediately — datums and intakes move.
Field guide: River Gauge Station Inspection Logger
A river gauge is only as honest as its plumbing and its datum: silted intakes make stage lag the river (fatal during flash floods, when the lag is the warning), a transducer drifts millimeters that become cubic meters through the rating curve, and one good flood can shift the channel control so the rating itself — the stage-to-flow translation — quietly expires. This logger structures the site visit around those truths: reference checks first (staff plate versus sensor), then intakes, sensors, telemetry, and the channel observations that tell hydrographers a new rating measurement is due.
Flood season inverts priorities: a station down in August is maintenance; the same station down during monsoon is a public-safety gap with downstream warning systems running blind. The 'station down (flood season)' class encodes that urgency. Post-flood visits get their own discipline — survey the high-water marks before weather erases them, verify the staff datum hasn't moved with its bank, and expect intakes full of the flood that mattered.
Field tips
- Read the staff plate and the sensor at the same instant on every visit — that one comparison validates the entire record between visits.
- Flush intakes BEFORE flood season, not during the first event; lagging stage during the rise is the program's worst failure mode.
- After major floods, flag and survey high-water marks within days — they calibrate the peaks that gauges miss or clip.
Records are stored only in this browser (localStorage) — export regularly. This tool aids field documentation; it does not replace your agency's official inspection procedures or engineering judgment.
River Gauge Station Inspection Logger — Stream gauge site checks — intakes, stilling well, staff plates, datum, sensors, telemetry and channel changes; offline + GPS. Free, offline-first and GPS-aware: open it on any phone, log in seconds, and hand your GIS team clean GeoJSON.
About River Gauge Station Inspection Logger
A river gauge is only as honest as its plumbing and its datum: silted intakes make stage lag the river (fatal during flash floods, when the lag is the warning), a transducer drifts millimeters that become cubic meters through the rating curve, and one good flood can shift the channel control so the rating itself — the stage-to-flow translation — quietly expires. This logger structures the site visit around those truths: reference checks first (staff plate versus sensor), then intakes, sensors, telemetry, and the channel observations that tell hydrographers a new rating measurement is due.
How to use River Gauge Station Inspection Logger
- 1Enter the station id / river and tap 📍 GPS to pin the gauge station's exact location (or type coordinates).
- 2Work through the gauge station checklist — every field matches what a real inspection program records.
- 3Pick a condition on the Operating — data good / Maintenance item / Data suspect — flag / Station down (flood season!) ⚠ scale; actionable findings are tallied automatically.
- 4Add notes and log the inspection — it saves instantly to your device, even with zero signal.
- 5Export the round as CSV for your asset system, GeoJSON for the GIS, or print a clean report.
Why use River Gauge Station Inspection Logger?
- ✓100% free, no sign-up — built for crews, not per-seat licences
- ✓Offline-first: records save to your device instantly and survive dead zones
- ✓One-tap GPS tagging with accuracy capture on every record
- ✓Exports CSV for asset systems, GeoJSON for GIS, and print-ready reports
- ✓Checklist and guidance aligned with USGS
Frequently asked questions
Why do silted intakes endanger flood warnings?+
The stilling well sees the river through its intakes; silt throttles them, so well level lags true stage — most severely during rapid rises, exactly when warnings fire. A gauge reading 'rising slowly' while the river is in a wall-of-water rise has happened in post-event reviews. Free-flowing intakes are a warning-system component, not housekeeping.
What is a rating curve and why does it 'expire'?+
The empirical stage-discharge relation built from many flow measurements at that site, valid while the channel control (the riffle/bar/structure governing stage) stays put. Floods rearrange controls; the curve then mistranslates stage into flow. Channel-change findings in this log are the trigger for new measurements that re-anchor it.
How is the gauge datum verified?+
By differential leveling from established benchmarks to the staff plate and sensor orifice on a schedule (and after floods or bank movement). A staff that settled 30 mm with its bank lies by 30 mm forever after. 'Datum verification due' is the finding that keeps a station's record continuous across decades.
What does staff-vs-sensor disagreement indicate?+
Worked from cheap to expensive: sediment around the orifice/intakes, drifted transducer calibration, moved staff plate, or actual datum shift. The instantaneous comparison localizes it — agreement at low flow but divergence at high suggests intakes; constant offset suggests calibration or datum. Logged pairs over visits hand the hydrographer the diagnosis.
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