The importance of sediments in ecological quality assessment of stream headwaters: embryotoxicity along the Nidda River and its tributaries in Central Hesse, Germany

Schweizer, Mona; Dieterich, Andreas; Corral Morillas, Núria; Dewald, Carla; Miksch, Lukas; Nelson, Sara; Wick, Arne; Triebskorn, Rita; Köhler, Heinz-R.

doi:10.1186/s12302-018-0150-4

Environmental Sciences Europe

Table 6 Physicochemical parameters measured at the main sampling sites at the time of sampling

From: The importance of sediments in ecological quality assessment of stream headwaters: embryotoxicity along the Nidda River and its tributaries in Central Hesse, Germany

	Main sampling sites
	N1	N2	N3	N4	N5	N6	H1	H2	H3	H4	U1	U2	U3	U4
pH
July 15	7.46	7.86	7.37	7.43	7.62	7.81	7.79	7.91	7.77	7.84	7.09	7.92	8.20	7.75
November 15	7.56	7.99	7.50	7.74	7.77	7.77	7.43	7.83	7.95	7.84	7.10	7.50	7.40	7.66
January–April 16	6.98	6.98	6.73	7.27	7.11	7.37	7.19	7.21	7.69	7.98	7.00	7.31	7.10	7.35
July 16	7.85	7.73	7.36	7.36	7.58	7.62	7.76	7.30	7.54	7.36	7.64	7.85	7.96	7.73
Nitrate [NO₃–N] (mg/L)
July 15	1.20	1.40	1.70	2.70	2.60	2.70	0.50	1.70	5.00	2.80	2.50	5.60	3.60	3.70
November 15	2.00	4.00	8.00	11.0	9.00	12.0	2.00	5.00	7.00	5.00	4.00	23.0	14.0	21.0
January–April 16	7.00	13.0	8.00	2.71	2.26	15.0	7.40	> 20.0	0.70	0.90	3.40	4.20	3.90	4.40
July 16	8.10	10.6	12.2	12.0	10.9	8.10	4.30	4.40	7.03	3.80	3.90	5.50	4.60	3.90
Nitrite [NO₂–N] (mg/L)
July 15	0.01	0.01	0.10	0.08	0.09	0.04	0.01	0.02	0.05	0.06	0.05	0.02	0.04	0.13
November 15	0.01	0.01	0.07	0.09	0.07	0.05	< 0.003	0.02	0.04	0.03	0.01	0.02	0.03	0.13
January–April 16	0.02	0.02	0.02	0.004	0.01	0.05	0.03	0.03	0.04	0.03	0.04	0.06	0.05	0.11
July 16	0.01	0.02	0.20	0.04	0.04	0.04	0.02	0.03	0.05	0.06	0.04	0.01	0.06	0.13
Ammonium [NH₄–N] (mg/L)
July 15	0.06	0.04	0.26	0.08	0.14	0.07	0.05	0.05	0.22	0.16	0.09	0.04	0.17	0.18
November 15	< 0.04	0.04	0.67	0.34	0.23	0.21	< 0.04	0.10	0.16	0.10	< 0.04	< 0.04	0.07	0.27
January–April 16	< 0.04	< 0.04	0.12	0.08	0.10	0.13	0.05	0.05	0.06	0.07	< 0.04	0.09	0.12	0.20
July 16	< 0.04	0.06	0.68	0.04	0.05	0.07	< 0.04	0.15	0.11	0.10	0.07	0.05	0.16	0.09
Phosphate [PO₄–P] (mg/L)
July 15	< 0.05	0.05	0.17	0.26	0.30	0.32	0.05	0.12	0.16	0.22	0.06	0.27	0.13	0.28
November 15	0.05	0.05	0.13	0.28	0.37	0.26	< 0.05	0.20	0.16	0.17	0.10	0.22	0.17	0.28
January–April 16	< 0.05	< 0.05	0.10	0.02	0.05	0.16	0.07	0.12	0.19	0.19	0.20	0.25	0.27	0.22
July 16	0.07	0.08	0.12	0.24	0.22	0.27	0.08	0.16	0.17	0.25	0.10	0.32	0.20	0.19
Chloride [Cl⁻] (mg/L)
July 15	8.0	10.0	28.0	73.0	86.0	> 200	5.0	18.0	108	106	29.0	91.0	120	> 200
November 15	9.0	17.0	61.0	85.0	83.0	256	8.0	31.0	86.0	85.0	28.0	71.0	96.0	824
January–April 16	11.0	25.0	22.0	35.0	29.0	83.0	< 2.5	< 2.5	20.0	25.0	22.0	34.0	34.0	270
July 16	11.0	14.0	40.0	39.0	46.0	194	7.0	23.0	80.0	96.0	47.0	67.0	69.0	> 200

The third sampling campaign was conducted in January (Usa), February (Nidda) and April (Horloff) 2016

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