Table 2. Compiled mean and standard error of physicochemical descriptors in each reach of the studied rivers.

	Urumea		Leitzaran		Kadagua		Deba
	Control	Diverted	Control	Diverted	Control	Diverted	Control	Diverted
pH	7.65 ± 0.09	7.54 ± 0.08	8.13 ±0.05	8.14 ± 0.02	8.16 ±0.13	8.27 ± 0.10	8.14 ±0.19	8.15 ± 0.04
Conductivity (μS cm−1)	75.13 ± 5.89	74.97 ± 6.32	243.00 ± 19.14	242.33 ± 19.64	586.00 ±38.32	590.00 ±45.51	505.00 ± 78.23	508.67 ± 61.48
Temperature (°C)	14.80 ± 1.21	15.00 ± 1.10	15.13 ±2.14	15.73 ±2.21	16.70 ±2.39	17.00 ± 2.30	18.30 ±0.38	17.90 ± 0.38
Dissolved oxygen (%)	108.90 ± 5.77	108.60 ± 6.82	103.30 ±6.58	102.3 ± 0.88	97.00 ± 0.05	103.9 ± 1.93	115.40 ±0.91	105.80 ±4.68
Cl− (mg L−1)	4.16 ± 1.50	3.00 ±0.38	6.06 ±0.28	6.98 ± 2.73	14.28 ± 5.37	8.03 ± 1.06	12.22 ± 1.97	12.37 ± 1.70
SO4−2 (mg L−1)	2.55 ±0.91	2.1 ±0.46	7.07 ± 0.95	7.18 ± 3.17	35.83 ± 10.93	20.32 ± 1.06	19.85 ± 5.99	20.02 ± 5.70
NO3−2 (mg L−1)	1.58 ± 0.67	1.04 ±0.22	2.53 ±0.11	2.81 ± 0.94	3.56 ±2.70	0.98 ± 0.17	2.13 ±0.38	2.22 ±0.17
NH4+(ugNL−1)	15.65 ±2.69	16.68 ±5.61	14.32 ± 4.70	13.90 ± 5.38	56.72 ±8.61	51.53 ± 9.82	27.02 ± 7.07	24.50 ± 6.75
DOC (mg C L−1)	1.91 ± 0.14	1.91 ±0.48	3.39 ±0.15	3.97 ± 0.39	6.40 ± 0.52	7.89 ± 0.83	5.67 ±0.96	6.14 ± 0.26
TDN (mg N L−1)	0.85 ± 0.06	0.85 ± 0.04	1.11 ±0.10	1.26 ±0.17	1.54 ±0.10	1.47 ± 0.11	1.94 ± 0.28	1.94 ±0.35
SRP(μgPL−1)	6.78 ± 1.12	9.92 ± 1.73	32.18 ± 11.42	29.04 ± 9.58	31.59 ± 11.10	28.10 ± 9.90	54.11 ± 9.90	49.25 ± 16.45
Wet width (m)	21.57 ±0.57	15.98 ±0.75	10.12 ± 0.42	9.66 ± 0.40	20.88 ±0.79	16.89 ± 0.74	20.61 ±0.79	16.58 ± 0.44
Discharge (m3 s−1)	4.60 ± 1.43	1.71 ±0.23	1.67 ±0.62	0.9 ± 0.68	2.57 ±1.22	0.80 ± 0.10	1.55 ±0.63	0.94 ± 0.13
TDN gradient (Log10TDN)	-0.064 ± 0.017		0.073 ± 0.035		0.177 ±0.021		0.288 ± 0.043

Note: TDN gradient score for each river is also indicated in the table. Rivers are ordered following log₁₀(TDN) values from left to right.