-year return period, based on the complete ICRA dataset. Timeseries were
extracted using the average value of all the grid-points within the catchment. 1M5 value
is shown in red.
Hálslón
2 years 5 years 10 years 25 years 50 years 100 years
3 hours 8 11 13 15 18 20
6 hours 18 23 27 31 36 39
12 hours 35 43 49 54 62 67
24 hours 60 70 78 85 94 101
48 hours 91 105 115 125 137 147
/media/vedurstofan-utgafa-2022/VI_2022_006_extreme.pdf
to
Earthquakes shake Bláfjöll ski-area
Two
earthquakes of magnitude around M4 occurred, only 5 seconds apart,
14.9.2018
On the 13th of
September at 20:17, two earthquakes of magnitude
/about-imo/news/earthquakes-around-blafjoll-ski-are
the Fljótsdalsheiði region . . . . . . . 47
18 Seasonal mean wind power density within the Fljótsdalsheiði region . . . . . . . . 48
19 Directional mean wind power density within the Gufuskálar region . . . . . . . . . 49
20 Seasonal mean wind power density within the Gufuskálar region . . . . . . . . . . 50
21 Directional mean wind power density within the Hellisheiði region . . . . . . . . . 51
22 Seasonal mean
/media/vedurstofan/utgafa/skyrslur/2013/2013_001_Nawri_et_al.pdf
in flooding were evaluated at 67 sites in Finland with var-
iable sizes of runoff areas using a conceptual hydrological model and 20 climate scenarios from both glo-
bal and regional climate models with the delta change approach. Floods with a 100-year return period
were estimated with frequency analysis using the Gumbel distribution. At four study sites depicting dif-
ferent watershed types
/media/ces/Journal_of_Hydrology_Veijalainen_etal.pdf
20 cm of
observed uplift was modelled with another sill intrusion, but deeper than before, at ~6.3
km depth (Pedersen and Sigmundsson, 2005).
Both intrusion episodes, in 1994 and 1999, were also detected by GPS and dry tilt
measurements. Sturkell et al. (2003) modelled the data from 1999 by a point pressure
source at 3.5 km depth, just south of the glacier rim. They suggested a similar model
/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_013.pdf
-values, average windspeed and the median for the average windspeed in m/s, km/h, and knots.
Top of page
Windspeed classification
To ease the understanding of the m/s measurement, the following table can be used.
Windspeed IN m/s
Description
<5
Very slow wind
5-10
Rather slow wind
10-20
Considerable wind, may lead to difficulties
20-30
Very windy, caution is advised
>30
/weather/articles/nr/1283
-values, average windspeed and the median for the average windspeed in m/s, km/h, and knots.
Top of page
Windspeed classification
To ease the understanding of the m/s measurement, the following table can be used.
Windspeed IN m/s
Description
<5
Very slow wind
5-10
Rather slow wind
10-20
Considerable wind, may lead to difficulties
20-30
Very windy, caution is advised
>30
/weather/articles/nr/1283/
currents. Because of the wide range of likely flow rheologies, three Manning's n values are assessed: 0.05, 0.1, and 0.15 s/m1/3. Results indicate that a large part of the lowland between the rivers Skaftafellsá and Breiðá (350 km2) is susceptible to flooding because of jökulhlaups descending the western and southern slopes of Öræfajökull. Characterised by average flow velocities in excess of 20 m/s
/hydrology/hazard-risk-assessments/glacial-outburst-floods/markarfljotsaurar-oraefajokull/
(Quante and Colijn, 2016). Work on risk analysis and adaptation is in different
stages in the countries of the world.
Coastal floods have caused problems in Iceland in the past (Jóhannsdóttir, 2017) and are likely to do
so in the future as well. Large coastal floods can be expected in Iceland every 10 - 20 years and the
probability of such events can rise with climate change (Almannavarnir, 2011
/media/vedurstofan-utgafa-2020/VI_2020_005.pdf