Water Quality (Rivers)

Dissolved gases & major ions; Bicarbonate buffer system; Nutrients- N, P and DOC; Water temperature

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What varies the dissolution of O2 and CO2 in rivers?
A and C
1 of 18
When water temp rises, the conc of O2 and CO2...
Falls
2 of 18
In groundwater there is...
Low O2 and high CO2
3 of 18
Why is this?
A and C
4 of 18
In small turbulent streams there...
A saturation of O2 and CO2
5 of 18
The two major ions in river water are:
CA2+ and HCO3-
6 of 18
What is the world average runoff ratio (average runoff per unit area/average rainfall)?
0.46
7 of 18
This suggests that the other (1-runoff ratio) is...
Evaporated
8 of 18
What % of river water sodium (Na+) originates from precipitation?
8
9 of 18
What is the main source of river water sodium (Na+)?
Halite in sedimentary rocks
10 of 18
The main sources of SO4(2-) are:
B and C
11 of 18
100% CO2=
Acidic river
12 of 18
100% HCO3- =
Neutral river
13 of 18
100% CO3(2-) =
Alkaline river
14 of 18
What are the causes of increased DOC?
A, B and D
15 of 18
A possible remediation of DOC is:
Drain-blocking
16 of 18
Water temperature is important for ecotherms, structure of stream communities, organic matter decomposition, chemical reactions and...
Dissolved gas concentrations
17 of 18
The main driver of stream temperature is:
Shortwave radiation
18 of 18

Other cards in this set

Card 2

Front

When water temp rises, the conc of O2 and CO2...

Back

Falls

Card 3

Front

In groundwater there is...

Back

Preview of the front of card 3

Card 4

Front

Why is this?

Back

Preview of the front of card 4

Card 5

Front

In small turbulent streams there...

Back

Preview of the front of card 5
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