Quote (joeinfhills @ Apr 3 2016 04:16pm)
Wow.. I leaned something new today :)
cant tell if sarcastic or not
Quote (RzChaos @ Apr 3 2016 02:50pm)
DO is dissolved oxygen. Fish need oxygen to breathe, it isn't "food". It is oxygen, just like it is for you and me.
For a given temperature and pressure, only so much oxygen can be dissolved in a sample of water.
DO_saturation would be given as a percent, like 50%. Meaning that if at the given conditions, the sample could contain a max of X DO, then it contains 0.5X.
BOD is how much of the DO is needed by aerobic bacteria to break down organic material in the water.
If you have a large amount of organics in the water, then the BOD is going to be high, because the bacteria are going to need a lot of DO to break down the material. They are now consuming a large amount of the DO, so there is less DO for other aerobic life forms.
ahh i see.
do u know how to problems involving BOD and DO? like critical deficit and critical time?