Station 1

Station 2

Station 3

Features of the reach

Constrained

Unconstrained

Unconstrained

Riparian vegetation

Native

Native

Native

Land use

Agriculture

Agriculture

Forestry/Agriculture

Substrate type

Silt/Sand

Silt/Sand

Sand/Clay

Canopy cover (%)

60

60

70

Qualitaative habitat evaluation index (QHEI)

80

54

67

pH

7.23 ± 0.0095**

7.075 ± 0.0126**

6.96 ± 0.037**

(7.2 - 7.26)

(7.04 - 7.12)

(6.8 - 7.02)

Electrical conductivity (µS/cm)

111.6 ± 0.46**

210.65 ± 0.41**

106.95 ± 0.128452**

(110 - 113.1)

(209 - 211.7)

(106.6 - 107.5)

Colour (Pt.Co)

2.47 ± 0.147**

5.51 ± 0.13**

3.63 ± 0.20**

(2 - 2.89)

(5 - 5.83)

(3 - 4.1)

Turbidity (NTU)

15.38 ± 0.13**

22.44 ± 0.11**

14.44 ± 0.16**

(15 - 15.76)

(22 - 22.7)

(14 - 14.86)

TSS (mg∙l−1)

46.47 ± 0.51**

52.37 ± 0.48**

50.23 ± 0.46**

(45 - 48)

(51 - 54)

(48.9 - 51.6)

TDS (mg∙l−1)

56.42 ± 0.21*

107.57 ± 0.29*

53.67 ± 0.32*

(55.8 - 57)

(107 - 108.8)

(52.7 - 54.6)

DO (mg∙l−1)

6.63 ± 0.09**

6.11 ± 0.02**

6.39 ± 0.05**

(6.4 - 7.01)

(6.02 - 6.17)

(6.3 - 6.6)

BOD5 (mg∙l−1)

2.80 ± 0.03**

2.70 ± 0.03**

2.14 ± 0.03**

(2.7 - 2.89)

(2.6 - 2.78)

(2.05 - 2.23)

COD (mg∙l−1)

24.18 ± 0.18**

14.37 ± 0.21**

13.01 ± 0.07**

(23.7 - 24.87)

(13.6 - 15.02)

(12.8 - 13.2)

NH4N (mg∙l−1)

0.014 ± 0.002*

ND

0.008 ± 0.0026*

(0.01 - 0.02)

(0 - 0.015)

NO2 (mg∙l−1)

0.013 ± 0.002*

0.05 ± 0.011*

0.013 ± 0.0015*

(0.01 - 0.02)

(0.02 - 0.09)

(0.01 - 0.02)

NO3 (mg∙l−1)

0.03 ± 0.005*

0.06 ± 0.0071*

0.045 ± 0.006*

(0.01 - 0.04)

(0.04 - 0.09)

(0.03 - 0.06)

Phosphate (mg∙l−1)

0.64 ± 0.025*

0.24 ± 0.02*`

1.67 ± 0.14*

(0.57 - 0.73)

(0.19 - 0.3)

(1.32 - 2.05)

Temperature (˚C)

25.92 ± 0.36**

25.74 ± 0.28**

25.05 ± 0.31**

(24.8 - 27)

(25 - 26.6)

(24 - 26)

Depth (m)

0.28 ± 0.02**

0.27 ± 0.02**

0.30 ± 0.03**

(0.24 - 0.35)

(0.23 - 0.34)

(0.25 - 0.4)

Flow velocity (m∙s−1)

0.24 ± 0.04*

0.11 ± 0.03*

0.19 ± 0.06*

(0.24 - 0.35)

(0.08 - 0.16)

(0.14 - 0.29)