Lab costs for grant received by Green Lake Association.

Sediment oxygen demand results.

Write-up of how oxygen demand was determine on sediment samples.

The Green Lake Association is sponsoring a lake protection grant on Big Green Lake in Green Lake County.The main goal of this D&F Study is to study the metalimnetic oxygen minima issue, determine biological / chemical causative mechanisms and create models to assess degree of potential water quality improvements from management actions.

The Green Lake Association is sponsoring a lake protection grant on Big Green Lake in Green Lake County.The main goal of this D&F Study is to study the metalimnetic oxygen minima issue, determine biological / chemical causative mechanisms and create models to assess degree of potential water quality improvements from management actions. The following work activities will be completed: 1.Install and monitor continuous-sampling mooring buoys, Conduct sediment core analysis of sediment oxygen demand and physical parameters,Conduct sediment core analysis of radionuclide and biogeochemical tracers,Continue water column profiles and stream monitoring,Expand ongoing sampling with additional chemical sampling,Conduct biological sampling & Use Biofish to describe horizontal variations of water quality. 2. Develop an empirical eutrophication model with coupled hydrodynamic lake model a. Review historic data, conduct sensitivity analysis to quantify response of TP & DO to changes in identified driver(s), Identify the reductions needed to achieve WQ goals, Develop alternative management strategies to achieve WQ goals & Evaluate and rank alternative strategies b.Determine the feasibility of meeting WQ goals, recommend alternative management strategies and monitor for changes, Update the LMP. 3.Communicate findings to lake stakeholders (local & statewide), give presentation at Lake Conference, post info on websites.