Two of the main features for depth where DO is present are 1. water clarity and 2 wind mixing depth due to fetch of the water body. 1. Generally DO is produced by phytoplakton in the euphotic zone which is often 2 times the secchi depth This can vary depending on several things. 2. Strong or high wave action will mix the oxygenated waters into the depths depending on wave height. The greater the fetch and stronger the wind the greater the wave height and deeper the mixing. Fetch- the distance the wind blows across a body of water.
In most lakes and ponds that are eutrophic, the thermocline is the depth where DO begins rapid decrease to concentrations that eliminate fish.
Last edited by Bill Cody; 06/09/12 09:19 PM.
