Brda

https://en.wikipedia.org/wiki/Brda_(river) 15.10.2016

 

 

COMPARING OF INVESTIGATIONS

Place: Brda River, Bydgoszcz,  Poland

 Time of the year: winter  and early spring 2016

Investigation carried out by: Polish students (winter) and Erasmus+ team (early spring)

 

Winter

average value

Early spring

 average value

TEMPERATURE oC

7.5

10oC

pH

7.35

7.6

general hardness

11.5 on

11.7 on

carbonate hardness

9 on

8.3 on

nitrates (III) NO2-

< 0.025 mg/l

< 0.025 mg/l

nitrates (V) NO3-

2.66 mg/l

1.16 mg/l

phosphates PO43-

0.25 mg/l

0.25 mg/l