Table 1. Anova test of environmental variables (means ± SE) of streams in the upper River Awash

Parameters	S1	S2	S3	S4	S5	F-stat	p-value
Water depth (m)	0.64 ± 0.1	0.5 ± 0.2	1.51 ± 0.1	0.43 ± 0.2	0.48 ± 0.13	1.21	0.01*
Velocity (m/s)	0.54 ± 0.6	0.21 ± 0.06	1.3 ± 0.02	0.25 ± 0.08	0.35 ± 0.06	0.98	0.02*
Water Temp. (°C)	19.3 ± 2.1	21.3 ± 1.5	21.3 ± 2	20.5 ± 3.1	22.6 ± 2.2	0.01	0.16
DO (mg/L)	7.5 ± 0.6	6.3 ± 2.0	7.13 ± 0.8	8.2 ± 1	6.8 ± 1.2	0.12	0.34
Conductivity (µS/cm)	214 ± 15	300 ± 33	265 ± 39	187.2 ± 19	285.5 ± 23	0.09	0.56
NH3+ (mg/L)	0.08 ± 0.03	0.43 ± 0.03	0.13 ± 0.01	0.7 ± 0.02	1.56 ± 0.02	0.07	0.09
NO3-(mg/L)	0.41 ± 0.04	0.82 ± 0.05	0.69 ± 0.07	1.81 ± 0.2	0.60 ± 0.05	1.45	0.02*
TP (mg/L)	0.8 ± 0.06	0.51 ± 0.04	3.2 ± 0.03	3.8 ± 0.03	0.53 ± 0.03	0.59	0.00**

p < 0.05;
p < 0.01.
S1, Site 1; S2, Site 2; S3, Site 3; S4, Site 4; S5, Site 5; DO, dissolved oxygen; TP, total phosphorus.