what the colour figure is measuremnet of ..?what does colour hazen show?

Question

The table below is an analysis of the water in natural loch in Scotland

colour hazen units:12.5

TDS:65 mg/l, CL:15 mg/l, SO4 :28.2, Na 6.0 mg/l, K:.83 mg/l,Ca:12.03,Mg:1.701 mg/l

what's your comment briefly on:

1-whether the oxygen content of the water would be expected to be higher / lower in winter compared to summer ?

2-whether the oxygen content would be expected to be higher / lower than on seawater at the same temperature

Answer 1

color hazen limits is the color of a water sample on a scale of 1 to 70. go to web1.er.usgs.gov/nemi/method_pdf/5535.pdf to find out more.