Money Strike

Design a weir or flume gauging station, rate it and track how its zero drifts.

Money Strike is a bench for setting out a small stream gauging station and checking whether its readings can be trusted.

You start 🚀 by describing the site 🏗️. Set the channel width and the length of the straight approach, then pick the bed the water runs over. Next you choose one of ten structures, such as a V-notch plate, a rectangular weir or a flume. You set the crest height and the elevation redraws to match.

The app 📱 then works out the rating for what you built. You see 👀 the rating curve, a table 📋 of head against flow with an uncertainty on every row, and the range of head that can be measured.

Each rating is checked against its limits. A short note 📝 names every problem, for example a crest that is too low or an approach that is too short. The rating either holds, is suspect, or is void.

Features
- Ten structures drawn to scale, with the head shown on the plate
- Rating curve and rating table 📋 at 5, 10 or 25 mm steps
- Plain-words checks for the rating
- A fault bench of nine installation faults, with what each does to the reading
- A bench kit of ten items and what each is for

Keep the zero honest. Log 📝 each gauging visit with a staff reading and a check ✅ level 🧗 against the benchmark. Add a photo 📸 of the fixed mark to a visit. Money Strike charts the drift of the zero from visit to visit. It tells you when the drift passes the limit and the board needs re-levelling.

Use Money Strike if you gauge a beck, a drain or a works channel and want to know 💡 how far to believe the number 🔢 on the board.