Physicochemical Characterization of Dembi Reservoir Water for Suitability of Fish Production, Southwest Ethiopia
Table 2
Chemical characteristics of water at Dembi reservoir (n = 10).
Chemical characteristics
Sampling sites
Overall mean ± SD
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
pH
7.64 ± 0.02bcd
7.6 ± 0.02cd
7.67 ± 0.04bcd
7.71 ± 0.09abc
7.75 ± 0.03ab
7.7 ± 0.02abcd
7.72 ± 0.02abc
7.81 ± 0.03a
7.63 ± 0.01cd
7.59 ± 0.04d
7.68 ± 0.07
DO
4.53 ± 0.02de
4.39 ± 0.04f
4.61 ± 0.06bcd
4.47 ± 0.03ef
4.77 ± 0.07a
4.56 ± 0.01cde
4.65 ± 0.05bcd
4.67 ± 0.01abc
4.73 ± 0.01ab
4.54 ± 0.04de
4.6 ± 0.12
TH
23.0 ± 0.02a
22.47 ± 0.04c
22.38 ± 0.03cd
22.32 ± 0.02d
21.36 ± 0.05i
21.75 ± 0.07g
21.89 ± 0.04f
21.6 ± 0.02h
22.04 ± 0.03e
22.82 ± 0.01b
22.16 ± 0.51
NO3-
6.27 ± 0.04a
5.28 ± 0.01c
6.13 ± 0.05b
6.07 ± 0.01b
5.13 ± 0.05d
5.11 ± 0.07de
5.1 ± 0.05de
5.02 ± 0.01e
5.16 ± 0.04d
5.17 ± 0.04d
5.44 ± 0.48
NO2
0.47 ± 0.01a
0.29 ± 0.02d
0.34 ± 0.01c
0.4 ± 0.015b
0.21 ± 0.02e
0.21 ± 0.03e
0.13 ± 0.01g
0.17 ± 0.02ef
0.21 ± 0.02e
0.21 ± 0.01e
0.26 ± 0.11
NH4
2.23 ± 0.06a
2.15 ± 0.06ab
2.17 ± 0.05ab
2.17 ± 0.05ab
2.09 ± 0.04b
2.13 ± 0.05ab
2.02 ± 0.04ab
2.08 ± 0.04b
2.07 ± 0.04b
2.13 ± 0.05ab
2.13 ± 0.06
TP
3.24 ± 0.04a
3.11 ± 0.02b
3.03 ± 0.02c
3.12 ± 0.03b
2.9 ± 0.05d
2.88 ± 0.02d
3.01 ± 0.01c
2.73 ± 0.03e
2.73 ± 0.04e
3.02 ± 0.01c
2.97 ± 0.16
SRP
2.07 ± 0.01a
1.76 ± 0.01b
2.06 ± 0.01a
2.03 ± 0.02a
1.42 ± 0.05c
1.52 ± 0.06c
1.4 ± 0.03c
1.52 ± 0.06c
1.5 ± 0.06c
1.42 ± 0.05c
1.67 ± 0.27
TA
53.64 ± 0.05a
53.33 ± 0.06b
53.14 ± 0.06c
51.83 ± 0.04e
51.31 ± 0.03f
52.65 ± 0.01d
53.0 ± 0.04c
53.03 ± 0.06c
50.73 ± 0.05g
52.67 ± 0.06d
52.54 ± 0.91
Ca
4.36 ± 0.06ab
4.34 ± 0.01ab
4.23 ± 0.03cd
4.37 ± 0.03a
4.15 ± 0.05de
4.15 ± 0.01de
4.09 ± 0.03e
4.16 ± 0.01de
4.26 ± 0.05bc
4.33 ± 0.03ab
4.24 ± 0.11
BOD
3.04 ± 0.01a
2.7 ± 0.02b
2.97 ± 0.06a
3.02 ± 0.02a
2.58 ± 0.03cd
2.48 ± 0.04d
2.3 ± 0.02e
2.58 ± 0.05c
2.57 ± 0.01cd
2.61 ± 0.03bc
2.68 ± 0.24
The values are given as mean ± SD. Chemical characteristics: DO (mg L−1), TH (mg L−1), NO3-N (mg L−1), NO2-N (mg L−1), NH4-N (mg L−1), TP (mg L−1), SRP (mg L−1), TA (mg L−1), Ca (mg L−1), and BOD (mg L−1). Mean value of reservoir sampling sites water chemical characteristics with a similar letter in a row are not significantly different from each other at 5% level of significance.
