Quiz Water Quality

quiz for apes

What is DO

Measures the amount of oxygen dissolved in water

Which of these can cause an increase in DO (select all that apply)
A. waterfalls
B. plants
C. Animals
D. Atmospheric pressure Decrease
E. Algae
F. rapids
G. Rocks
H. Turbines

Waterfalls, rapids, rocks, and turbines add DO to the water. The rest cause a decrease in DO

Hardness measures

the concentration of dissolved minerals by measuring polyvalent Cations in mg/l of CaCO3

What can influence the concentration of dissolved minerals

surrounding geology, waste water treatment plant effluent, mining operations.

What can cause Hardness

Weathering of limestone, Residues from food substances and cleaning agents, expose rocks containing calcium and magnesium, weathering and erosion of granite or igneous rocks.

The Tigris river has a water hardness of 200 mg/l

Lake Huron has a water hardness of 58 mg/l

The Dead Sea has a water hardness of 169 mg/l

Interpret the water hardness of these three bodies

The Tigris river has very hard water
Lake huron has soft water
The dead sea has hard water

How do you measure Nitrates

measure the organic or fertilizer matter in water in mh/l

What can cause an increase in Nitrates?

Runoff from agricultural land, residential lawns, and gold courses

What causes a decrease in Nitrates.

Springs, tributary, runoff or other clean water sources that reduces the level of nutrients per unit volume of water

What is pH

Measure the hydrogen ions on a logarithmic scale

What causes a decrease in pH

sphagnum moss and pine needles are slightly acidic (bogs, marshes, and pine forests).

How do you measure Phosphates?

measure the organic or fertilizer in water

What causes a decrease in Phosphates

Springs, tributary, runoff or other clean water sources that reduces the level of nutrients per unit volume of water

Can removal of vegetation change temperature?

Yes

How can stream-bank vegetation change temperature?

It provides shade and reduces runoff (turbidity)

What can cause a decrease in temperature

groundwater, tributary, springs, and reservoir bottom water can be colder than the receiving water

What is turbidity

Measures the clarity of water using a turbidimeter or Secchi Disk

What causes an increase in turbidity

Agriculture, road building, construction, and logging all increase erosion rates which increase turbidity.