Data is recorded in Norwegian standard time (equivalent to winter time).
The graphs showing real-time hydrological data display all measurements taken in the specific time period. The data displayed includes the 25th and 75th percentiles, as well as the median water level, water flow and ground water values. Statistics and percentiles is calculated from daily mean values. Daily mean values are not displayed. The explanation is only in Norwegian.
- Water level, link to: Map, list, overview of graphs
- Water discharge, link to: Map, list, overview of graphs
- Water temperature, link to: Map, list, overview of graphs
- Groundwater level, link to: Map, list, overview of graphs
- Groundwater temperature, link to: Map, list, overview of graphs
- Snow water equivalent, link to: Map, list, overview of graphs
- Air temperature , link to: Map, list, overview of graphs
Click at a symbol on the map:
Green square = graph updated last 24 hours,
Blue square = graph updated last week,
Red square = graph updated last 60 days,
Black square = missing data.
Link below the graph:
Graph with data from the last week,
List of values from the last 14 days,
List of values from the last 2 months,
List of daily mean values from the last 2 months.
Catchment area(nedbørfeltareal) is given in square kilometre.
Some important Norwegian words used on this website:
Vann - Water
Vannføring - Discharge
Sanntid-vannføring - Real-time discharge
Målestasjon - Metering station
Klikk - Click
Plott - Plot diagram
Kart- Map
Nedbørfeltareal - Catchment area
Explanation of real-time graphs:
Water flow: The volume of water that passes a given point in the river, expressed as volume per unit of time (usually m3/s).
Recurrence interval: Average number of years between each time an event (flood) will occur.
Mean flood: Average highest water flow each year.
10-year flood: Flood with a recurrence interval of ten years. There is a 10% probability each year that a flood exceeding this size will occur.
100-year flood: Flood with a recurrence interval of 100 years. There is a 1% probability each year that a flood exceeding this size will occur.
What are the 25th, 50th and 75th percentiles?
Water flow measurements are recorded in many watercourses every day. Comparing daily measurements with the water flow on the same date in previous years can provide an indication of the daily water flow level.
Example
If measurements are recorded on the same date for a period of 20 years, the five lowest water flows (25%) will be below the 25th percentile level; the five highest (25%) will be above the 75th percentile level, while the ten water flows in the middle (50%) will lie between the 25th and 75th percentiles. The 50th percentile indicates the average of the water flows measured on the date. In other words, there will be an equal number of observations that are higher than the 50th percentile as there are observations lower than the 50th percentile. The water flow in a river varies throughout the year, which means that the limit between the various levels will also vary.