Citation:

j.jhydrol.2010.11.028

Name: (Supplement 1) Selected chemical composition of Icelandic river waters and bedrock age
Published: 2011
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

In this study we map the spatial distribution of selected dissolved constituents in Icelandic river waters using GIS methods to study and interpret the connection between river chemistry, bedrock, hydrology, vegetation and aquatic ecology. Five parameters were selected: alkalinity, SiO2, Mo, F and the dissolved inorganic nitrogen and dissolved inorganic phosphorus mole ratio (DIN/DIP). The highest concentrations were found in rivers draining young rocks within the volcanic rift zone and especially those draining active central volcanoes. However, several catchments on the margins of the rift zone also had high values for these parameters, due to geothermal influence or wetlands within their catchment area. The DIN/DIP mole ratio was higher than 16 in rivers draining old rocks, but lowest in rivers within the volcanic rift zone. Thus primary production in the rivers is limited by fixed dissolved nitrogen within the rift zone, but dissolved phosphorus in the old Tertiary catchments. Nitrogen fixation within the rift zone can be enhanced by high dissolved molybdenum concentrations in the vicinity of volcanoes.

The river catchments in this study were subdivided into several hydrological categories. Importantly, the variation in the hydrology of the catchments cannot alone explain the variation in dissolved constituents. The presence or absence of central volcanoes, young reactive rocks, geothermal systems and wetlands is important for the chemistry of the river waters. We used too many categories within several of the river catchments to be able to determine a statistically significant connection between the chem¬istry of the river waters and the hydrological categories. More data are needed from rivers draining one single hydrological category. The spatial dissolved constituent distribution clearly revealed the difference between the two extremes, the young rocks of the volcanic rift zone and the old Tertiary terrain.

Project(s):

International Polar Year (2007-2008) (IPY)

Coverage:

Median Latitude: 64.656554 * Median Longitude: -18.730571 * South-bound Latitude: 63.420000 * West-bound Longitude: -23.170000 * North-bound Latitude: 66.174000 * East-bound Longitude: -14.000000

Event(s):

IS_A-Jokulsa (V144) * Latitude: 65.277000 * Longitude: -18.797000 * Location: Iceland * Method/Device: Water sample (WS)

IS_Asa-Eldvatn (V328) * Latitude: 63.643000 * Longitude: -18.338000 * Location: Iceland * Method/Device: Water sample (WS)

IS_Blanda (V54) * Latitude: 65.409000 * Longitude: -19.735000 * Location: Iceland * Method/Device: Water sample (WS)

Comment:

Positions approximate. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Station label	Station		Oskarsdottir, Sigrídur Magnea
5	Age, mineral	Age mineral	Ma	Oskarsdottir, Sigrídur Magnea		wt age of bedrock
6	Silicon dioxide	SiO2	mol/kg	Oskarsdottir, Sigrídur Magnea
7	Alkalinity, total	AT	mmol(eq)/kg	Oskarsdottir, Sigrídur Magnea		unit meq/kg
8	Molybdenum	Mo	nmol/kg	Oskarsdottir, Sigrídur Magnea
9	Fluorine	F	µmol/kg	Oskarsdottir, Sigrídur Magnea
10	Nitrogen, inorganic, dissolved/Phosphorus, inorganic, dissolved ratio	DIN/DIP		Oskarsdottir, Sigrídur Magnea	Calculated, ratio of molar masses

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

335 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Latitude	3 Longitude	4 Station	5 Age mineral [Ma]	6 SiO2 [mol/kg]	7 AT [mmol(eq)/kg]	8 Mo [nmol/kg]	9 F [µmol/kg]	10 DIN/DIP
IS_A-Jokulsa	65.277	-18.797	V144	2.30	0.0001710	0.275	1.200	2.950	1.797
IS_Asa-Eldvatn	63.643	-18.338	V328	0.07	0.0002790	0.680	2.710	7.591	21.960
IS_Blanda	65.409	-19.735	V54	0.82	0.0001640	0.413	2.400	3.490	9.388
IS_Bruara	64.231	-20.455	V108	0.23	0.0002190	0.338	0.880	2.750	5.580
IS_Djupa	63.924	-17.579	V150	0.72	0.0003070	0.307		4.250	3.057
IS_Dynjandi	65.695	-23.133	V19	11.75	0.0000700	0.050
IS_Eldvatn_M	63.612	-18.149	V330	0.03	0.0003170	0.674	4.140	10.800	2.680
IS_Ellidaar	64.062	-21.762	V301	0.27	0.0001400	0.468	0.766	2.310	5.440
IS_Fellsa	64.876	-15.013	V206	5.87	0.0001230	0.218	0.560	1.030	20.790
IS_Fjardará	65.223	-14.000	V2856	11.75	0.0000960	0.153	0.200	0.706	22.270
IS_Fljótsdal	64.943	-15.039	V109	1.62	0.0001110	0.499	2.980	3.190	11.790
IS_Flokadalsa	64.579	-21.441	V4017	2.19	0.0002240	0.415		2.590	74.800
IS_Fnjoska	65.815	-17.869	V200	0.84	0.0002600	0.413		1.350	0.700
IS_Geithellnaa	64.587	-14.763	V277	5.38					9.880
IS_Gigja	63.911	-17.275	V159	0.00	0.0001270	0.497		7.760	3.120
IS_Grenlaekur	63.699	-17.875	V339	0.55	0.0003060	0.648	3.840	8.690	1.820
IS_Grimsa_L	64.555	-21.523	V4015	2.55	0.0002090	0.525		2.920	57.960
IS_Grimsa_S	65.101	-14.479	V106	5.50	0.0001540	0.338	0.860	1.610	19.160
IS_Grimsstadir	65.593	-16.150	V102	0.18	0.0002090	0.811	5.610	7.066	1.187
IS_Hamarsa	64.654	-14.543	V102	5.43					7.310
IS_Hjaltadalsa	65.763	-19.241	V51	11.40	0.0001900	0.160			2.270
IS_Hjardarhagi	65.315	-14.951	V110	1.01	0.0000970	0.333	1.240	1.910	6.770
IS_Hverfisfljot	63.873	-17.652	V71	4.78	0.0001740	0.363	2.200	3.920	3.001
IS_Hvita_S	64.229	-20.128	V4013	0.41	0.0002030	0.546	2.700	5.410	2.930
IS_Hvita_W	64.639	-21.463	V66	0.80	0.0001960	0.430		3.008	12.810
IS_Kaldakvisl	64.400	-18.550	V252	0.94	0.0000687	0.720		6.310	5.390
IS_Kreppa	64.995	-16.119	V163	0.07	0.0001380	0.442		3.684	1.460
IS_Laqarfliot	65.467	-14.371	V17	4.74	0.0001440	0.409	1.220	1.760	10.940
IS_Laxa_A	65.559	-17.080	V105	1.70	0.0002200	1.200	8.380	12.300	2.940
IS_Laxa_V	64.368	-21.811	V4020	5.53	0.0003630	0.360		1.610	74.080
IS_Leira	63.601	-18.531	V1203	0.10	0.0002130	0.860		13.440	16.300
IS_Langisjór	64.188	-18.112	V401	0.20	0.0000760	0.409	1.260	2.710	5.070
IS_Loni	64.401	-14.876	V2605	3.44					2.540
IS_Mulakvisl	63.420	-18.796	V89	0.14	0.0003010	1.179		25.790	6.755
IS_Nordura	64.675	-21.556	V128	5.42	0.0001810	0.338	1.440	1.460	9.570
IS_Olfusa	63.894	-20.922	V64	0.68	0.0002130	0.457	2.160	4.620	9.320
IS_Osa	66.107	-23.170	V2639	9.20	0.0000800	0.149
IS_Reykjadalsa	64.608	-21.454	V4016	3.85	0.0004000	0.620		10.860	94.710
IS_Sanda	66.174	-15.542	V26	3.21	0.0005650	0.346
IS_Skaftárdalur	63.759	-18.434	V70	0.22	0.0002370	0.606	2.320	5.610	5.090
IS_Skeidará	63.951	-16.908	V88	0.26	0.0002120	2.036		11.860	11.130
IS_Skjálfandafljót	65.344	-17.309	V238	0.78	0.0002160	0.519		4.910	10.400
IS_Skötufjardara	65.849	-22.792	V402	11.00	0.0000700	0.124
IS_Sog	64.030	-20.937	V271	0.30	0.0001820	0.472	1.480	3.680	6.870
IS_Sula	63.929	-17.377	V2201	0.21	0.0001500	0.497		4.730	6.080
IS_Thjorsa_U	63.897	-20.580	V320	0.53	0.0002100	0.570	4.100	8.600	2.960
IS_Thvera_N	64.651	-21.370	V4014	5.34	0.0001390	0.455		3.860	56.830
IS_Thvera_S	64.414	-21.472	V4019	4.04	0.0001300	0.340		1.860	69.350
IS_Tungnaa	64.252	-18.196	V98	0.83
IS_Tungufljot	64.203	-20.289	V68	0.45	0.0002590	0.364	1.860	3.620	5.630
IS_Vatnsdalsa	65.264	-20.034	V45	1.64	0.0003480	0.680	2.300	4.250	4.070
IS_Vatnsdalsa_B	65.557	-23.074	V204	11.32	0.0000300	0.070
IS_Vesturkvisl	64.187	-18.054	V470	0.03
IS_Vididalsa	65.294	-20.545	V468	3.26	0.0003080	0.641		2.370	9.990
IS_W-Jokulsa	65.285	-19.034	V145	1.53	0.0002630	0.675	2.400	6.040	0.031
IS_Ytri-Ranga	63.836	-20.264	V321	0.17	0.0002900	1.287	18.070	28.070	2.150