Citation:

hyp.11478

Name: Saturated hydraulic conductivity of fen peat for different water salinities
Published: 2019-03-25
License: https://creativecommons.org/licenses/by/4.0/
Keywords: coastal peatland; fen peat; saturated hydraulic conductivity; water salinity

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Abstract:

Coastal peatlands represent an interface between marine and terrestrial ecosystems; their hydrology is affected by salt and fresh water inflow alike. Previous studies on bog peat have shown that pore water salinity can have an impact on the saturated hydraulic conductivity (Ks) of peat because of chemical pore dilation effects. In this study, we aimed at quantifying the impact of higher salinities (up to 3.5% NaCl) on Ks of fen peat. Two experiments employing a constant‐head upward‐flow permeameter and differing in measurement and salinity change duration were conducted. Additionally, a third experiment to determine the impact of water salinity on the release of dissolved organic carbon (DOC) of the studied peat type was carried out. The results show a decrease of Ks with time, which does not depend on the water salinity but is differently shaped for different peat types. We assume pore clogging due to a conglomerate of physical, chemical, and biological processes, which rather depend on water movement rate and time than on water salinity. However, an increased water salinity did increase the DOC release. We conclude that salinity‐dependent behaviour of Ks is a function of peat chemistry and that for some peat types, salinity may only affect the DOC release without having a pronounced impact on water flow.

Keyword(s):

coastal peatland; fen peat; saturated hydraulic conductivity; water salinity

Coverage:

Latitude: 54.009444 * Longitude: 12.124722

Event(s):

Poelchow * Latitude: 54.009444 * Longitude: 12.124722 * Location: Pölchow, Rostock, Mecklenburg-Vorpommern, Germany * Method/Device: Soil pit (SPIT)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Sample ID	Sample ID		Gosch, Lennart
2	Soil type	Soil type		Gosch, Lennart
3	Conductivity	Cond	mS/cm	Gosch, Lennart	electrical conductivity of water
4	Number	No		Gosch, Lennart	measurement interval number
5	Time in minutes	Time	min	Gosch, Lennart	measurement duration
6	Core length	Core length	cm	Gosch, Lennart
7	Core diameter	core diam	cm	Gosch, Lennart
8	Volume	Vol	cm³	Gosch, Lennart	of core
9	Hydraulic gradient	Hyd grad		Gosch, Lennart
10	Conductivity, hydraulic, saturated	Ks	m/day	Gosch, Lennart	corrected for temperature (10°C) and salinity (0.035%)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

1050 data points

Data

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

1 Sample ID	2 Soil type	3 Cond [mS/cm]	4 No	5 Time [min]	6 Core length [cm]	7 core diam [cm]	8 Vol [cm³]	9 Hyd grad	10 Ks [m/day]
1	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.2128
1	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.1147
1	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.1777
2	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.2733
2	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.2285
2	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.1618
3	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.4500
3	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.3539
3	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.5240
4	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.4581
4	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.2414
4	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.2643
5	fen peat	0.7	1	15	6.12	7.2	250	0.8	1.3216
5	fen peat	0.7	2	15	6.12	7.2	250	0.8	1.0127
5	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.7701
6	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.1747
6	fen peat	55.0	2	15	6.12	7.2	250	0.8	0.3333
6	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.0266
7	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.4211
7	fen peat	55.0	2	15	6.12	7.2	250	0.8	0.4930
7	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.2082
8	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.7325
8	fen peat	55.0	2	15	6.12	7.2	250	0.8	0.4202
8	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.1950
9	fen peat	0.7	1	15	6.12	7.2	250	0.8	1.4068
9	fen peat	55.0	2	15	6.12	7.2	250	0.8	0.9907
9	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.5538
10	fen peat	0.7	1	15	6.12	7.2	250	0.8	2.5313
10	fen peat	55.0	2	15	6.12	7.2	250	0.8	1.1738
10	fen peat	0.7	3	15	6.12	7.2	250	0.8	2.5920
11	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.0217
11	fen peat	21.0	2	15	6.12	7.2	250	0.8	0.0791
11	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.0453
12	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.0434
12	fen peat	21.0	2	15	6.12	7.2	250	0.8	0.0678
12	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.0249
13	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.1192
13	fen peat	21.0	2	15	6.12	7.2	250	0.8	0.0949
13	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.1451
14	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.4510
14	fen peat	21.0	2	15	6.12	7.2	250	0.8	0.3005
14	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.2539
15	fen peat	0.7	1	15	6.12	7.2	250	0.8	0.5529
15	fen peat	21.0	2	15	6.12	7.2	250	0.8	0.4903
15	fen peat	0.7	3	15	6.12	7.2	250	0.8	0.4375
16	fen peat	21.0	1	15	6.12	7.2	250	0.8	0.0315
16	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.0447
16	fen peat	21.0	3	15	6.12	7.2	250	0.8	0.0118
17	fen peat	21.0	1	15	6.12	7.2	250	0.8	0.0485
17	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.0447
17	fen peat	21.0	3	15	6.12	7.2	250	0.8	0.0094
18	fen peat	21.0	1	15	6.12	7.2	250	0.8	0.0485
18	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.0894
18	fen peat	21.0	3	15	6.12	7.2	250	0.8	0.0685
19	fen peat	21.0	1	15	6.12	7.2	250	0.8	0.1068
19	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.0626
19	fen peat	21.0	3	15	6.12	7.2	250	0.8	0.0425
20	fen peat	21.0	1	15	6.12	7.2	250	0.8	0.1456
20	fen peat	0.7	2	15	6.12	7.2	250	0.8	0.1900
20	fen peat	21.0	3	15	6.12	7.2	250	0.8	0.1393
21	fen peat	1.2	1	15	6.12	7.2	250	0.8	0.0063
21	fen peat	19.6	2	15	6.12	7.2	250	0.8	0.0053
21	fen peat	1.2	3	15	6.12	7.2	250	0.8	0.0063
22	fen peat	1.2	1	15	6.12	7.2	250	0.8	0.1221
22	fen peat	19.6	2	15	6.12	7.2	250	0.8	0.1253
22	fen peat	1.2	3	15	6.12	7.2	250	0.8	0.0849
23	fen peat	1.2	1	15	6.12	7.2	250	0.8	0.2020
23	fen peat	19.6	2	15	6.12	7.2	250	0.8	0.1686
23	fen peat	1.2	3	15	6.12	7.2	250	0.8	0.0727
24	fen peat	1.2	1	15	6.12	7.2	250	0.8	0.3729
24	fen peat	19.6	2	15	6.12	7.2	250	0.8	0.2529
24	fen peat	1.2	3	15	6.12	7.2	250	0.8	0.1649
25	fen peat	1.2	1	15	6.12	7.2	250	0.8	0.5438
25	fen peat	19.6	2	15	6.12	7.2	250	0.8	0.5974
25	fen peat	1.2	3	15	6.12	7.2	250	0.8	0.3152
26	fen peat	19.6	1	15	6.12	7.2	250	0.8	0.1240
26	fen peat	1.2	2	15	6.12	7.2	250	0.8	0.0308
26	fen peat	19.6	3	15	6.12	7.2	250	0.8	0.0216
27	fen peat	19.6	1	15	6.12	7.2	250	0.8	0.1624
27	fen peat	1.2	2	15	6.12	7.2	250	0.8	0.1163
27	fen peat	19.6	3	15	6.12	7.2	250	0.8	0.1547
28	fen peat	19.6	1	15	6.12	7.2	250	0.8	0.3608
28	fen peat	1.2	2	15	6.12	7.2	250	0.8	0.1163
28	fen peat	19.6	3	15	6.12	7.2	250	0.8	0.0982
29	fen peat	19.6	1	15	6.12	7.2	250	0.8	0.4510
29	fen peat	1.2	2	15	6.12	7.2	250	0.8	0.2918
29	fen peat	19.6	3	15	6.12	7.2	250	0.8	0.2578
30	fen peat	19.6	1	15	6.12	7.2	250	0.8	0.4871
30	fen peat	1.2	2	15	6.12	7.2	250	0.8	0.5908
30	fen peat	19.6	3	15	6.12	7.2	250	0.8	0.4420
B1	bog peat	0.7	1	15	6.12	7.2	250	0.8	0.0068
B1	bog peat	55.0	2	15	6.12	7.2	250	0.8	0.0113
B1	bog peat	0.7	3	15	6.12	7.2	250	0.8	0.0052
B2	bog peat	0.7	1	15	6.12	7.2	250	0.8	0.0152
B2	bog peat	55.0	2	15	6.12	7.2	250	0.8	0.0067
B2	bog peat	0.7	3	15	6.12	7.2	250	0.8	0.0025
B3	bog peat	0.7	1	15	6.12	7.2	250	0.8	0.0173
B3	bog peat	55.0	2	15	6.12	7.2	250	0.8	0.0159
B3	bog peat	0.7	3	15	6.12	7.2	250	0.8	0.0020
B4	bog peat	0.7	1	15	6.12	7.2	250	0.8	0.0370
B4	bog peat	55.0	2	15	6.12	7.2	250	0.8	0.0387
B4	bog peat	0.7	3	15	6.12	7.2	250	0.8	0.0143
B5	bog peat	0.7	1	15	6.12	7.2	250	0.8	0.0413
B5	bog peat	55.0	2	15	6.12	7.2	250	0.8	0.0341
B5	bog peat	0.7	3	15	6.12	7.2	250	0.8	0.0150