1. Home and Quick Access
- Explore the map: open the map of available basins.
- Compare basins: run the historical SWE series comparison.
- Languages: choose FR, EN, or IT in the selector.
2. Interactive Map and Filters
- Quick search: search for a basin and center the map.
- Basin details: click a basin, then 'View details'.
- Filters: filter by park, type, or glacier cover.
- Glaciated basins: hide basins with glacier cover above 15 %.
- Reset: reset the search, filters, and map.
3. Detailed Basin Page
- Period: choose a month, the latest data, or a hydrological year.
- SWE: read the value in mm, % of normal, and departure from normal.
- Glaciated basin: a badge flags glacier share above 15 %.
- Charts: compare the selected year, past years, and the historical average.
- Compare: add up to 3 nearby basins or open the historical comparison.
- Exports: download the SWE series as CSV or the outline as GeoJSON.
4. Historical Comparison
- Inter-basin mode: compare up to 5 basins over a common period.
- Inter-annual mode: compare several hydrological years for one basin.
- Filters: filter by source or park, then search for a basin by name.
- Period: adjust the date range before running the analysis.
- Results: show the chart, SWE summary, and CSV export.
5. Interpretation Notes
- SWE: water stored in the snow, expressed in mm.
- Hydrological year: from September to August.
- Historical normal: reference calculated from available past years.
- Monthly data: latest available day of the selected month.
- Glacier cover: 15 % threshold to flag or hide basins influenced by glaciers.