(L), glacial rivers (J)
and whether they flow through lakes (S). The combination of letters indicates the origin of flow
with the first letter indicating the primary origin. The hydrological regime of these catchments
is influenced by rainfall in autumn and winter, snowmelt in spring (and glacier melt in summer).
15
Table 1. Characteristics of the considered watersheds. Letter combinations indicate
/media/vedurstofan/utgafa/skyrslur/2014/VI_2014_006.pdf
combinations indicate the
type of river, with the first letter indicating the primary type. Direct runoff river (D), presence
of lakes (S), glacier-fed river (J), groundwater (L).
Gauging station vhm vhm vhm vhm vhm vhm
19 10 26 145 66 64
Name Dynjandisá Svartá Sandá Vestari- Hvítá Ölfusá
Jökulsá
Type of river D+L D+L D+L D+J+LL+J L+D+J+S
Drainage area (km 2) 42 397 267 850 1664 5687
Mean altitude (m a.s.l
/media/vedurstofan/utgafa/skyrslur/2013/VI_2013_008.pdf
study and location of catchments. Catchment vhm278 is embedded
within vhm148 and catchment vhm277 is embedded within vhm149.
9
llllll
ll
llllllllllll
ll llllll ll
l
ll
llllll
0 100 200 300
10
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Day since 1st Sept.
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VHM 148
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ll
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0 100 200 300
15
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25
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0
Day since 1st Sept.
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/s
VHM
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_007.pdf
presents the study area and data. Sec-
tion 3 describes the methodology. Section 4 presents the results and Section 5 concludes the
report.
2 Study area and data
2.1 River basins
Rivers in Iceland are often classified according to the origin of flow (Rist, 1990): direct runoff
(D), spring-fed (L), glacier-fed (J) and whether they flow through lakes (S). Twelve river basins
were selected for this study
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_009.pdf
in km2, L the
catchment perimeter in km, Z the catchment mean altitude in meters, P the catchment averaged
mean annual precipitation in mm/day for the period 1971–2000 and Pm the catchment averaged
mean annual maximum daily precipitation in mm/day for the period 1971–2000.
3.3 Evaluation statistics
The evaluation of the index flood regression models (Eqs. 7 to 12) was first conducted by calcu
/media/vedurstofan/utgafa/skyrslur/2014/VI_2014_001.pdf
/EPP 2
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5
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/media/ces/Alam_Ashraful_CES_2010.pdf
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