What this site is
Nokken.net pulls together near-real-time water-flow readings, short-range forecasts, and a working catalogue of paddleable river sections across Norway. The aim is narrow: tell you whether a stretch of river is at a level worth driving to, and let you keep an eye on the gauges that matter to you.
The audience is whitewater and touring paddlers, plus the small set of guidebook authors, instructors, and river nerds who track Norwegian hydrology for their own reasons. The interface is built for that audience first: fast, dense, and assumes you already know what a cumec is.
A short history
Nokken has been online since 2015, run continuously by the same volunteer for the better part of a decade. The original stack was PHP and MySQL on a small VPS; over the years it accumulated a gauge scraper, an alerts engine, a section catalogue, and a steady drip of contributions from paddlers across the country.
The current stack is a ground-up rebuild on Python, FastAPI, and PostgreSQL, with hand-written HTML, a little HTMX, and a deliberately small amount of JavaScript. The legacy URLs still resolve where it makes sense to keep them; everything else points at the new shapes. Nothing about the data contract has changed; the gauges, the sections, the thresholds are all the same numbers paddlers have been checking for years.
Where the data comes from
Live flow and water-level readings are sourced from the public feeds of three Norwegian operators:
- The Norwegian Water Resources and Energy Directorate (NVE), the bulk of the country's hydrological gauges.
- Glommens og Laagens Brukseierforening (GLB), gauges in the Glomma and Lågen catchments.
- Lysakerelvas Venner (LvV), gauges in the Lysaker catchment.
Weather observations and short-range forecasts come from the Norwegian Meteorological Institute (met.no). River-track elevation profiles are sampled from Kartverket's DTM 1 terrain model.
The section catalogue (names, grades, put-ins, take-outs, optimal flow ranges) is curated. Most of it traces back to the FrendeLause whitewater guides, the printed Padleguide for Oppdal og omegn, and a long tail of first-hand reports from paddlers who got in touch over the years.
Who runs it
The site is built and operated by a single volunteer, a paddler based in Norway. There is no company behind it, no team, no funding. Just one person, the occasional pull request, and a steady stream of corrections from the community. If you've ever sent in a flow threshold, a put-in correction, or a missing section, your name is probably attached to a row in the database somewhere; thank you.
Questions, corrections, and additions go through the contact form. It reaches a real human, usually within a week.
What this site isn't
It isn't a guidebook. The section pages tell you what the river is doing right now; they don't replace local knowledge, a printed guide, or a paddler who's been down the run before. Grades and flow thresholds are best-effort and occasionally wrong.
It isn't a commercial service. There's no subscription, no premium tier, no advertising, and no plan to add any. The cost of running it is measured in coffee and weekend hours.
It isn't affiliated with NVE, met.no, GLB, LvV, or Kartverket. Nokken consumes their public data on the same terms as any other caller, and credits each source on the pages where their data appears. Any mistake on this site is the operator's, not theirs.
Open corrections
If you spot a wrong grade, a moved put-in, an outdated optimal range, or a section that should exist and doesn't, please say so. Corrections from people who have actually paddled the run are the single highest-leverage way to improve the catalogue, and they always get applied.
Acknowledgements
Thanks to NVE, GLB, LvV, met.no, and Kartverket for keeping their data feeds open. Thanks to the authors of the FrendeLause guides and the Oppdal padleguide for the years of work behind the section knowledge that the catalogue rests on. And thanks to every paddler who has ever sent in a flow report, a correction, or a new section. This site is mostly your work.