Purposes and Ideas Behind the Project Esau – I have a interest in a career that involves natural resources. Austin – I am a new student at Wildlands this year. This project sounded like a great way to start the year. Brett – I also have an interest in a career in natural resources.

The Issues Sedimentation Issues and Mapping Water Quality Issues and Trophic State Flushing Rate

Sedimentation/Mapping… Background/Problem How has the pond changed over the last 5 years?

2006 Fall Creek Pond Depth Map

2011 Fall Creek Pond Depth Map

Trophic State… What is it? Why is it important? How is it calculated?

These are the three main Trophic States... Oligotrophic Mesotrophic Eutrophic

Oligotrophic

Mesotrophic

Eutrophic

How We Converted Our Data Trophic State Index Fall Creek Pond Site 1 Site 2 Site 3 Secchi in m Chl - a ppb Total P ppb Secchi in m Chl - a ppb Total P ppb Secchi in m Chl - a ppb Total P ppb 9/15/ /15/ /15/ /26/ /26/ /26/ /4/ /4/ /4/ /25/ /25/ /25/ /7/ /7/ /7/ Trophic State numbers derived visually from Carlson’s Trophic State Index graphic from EPA’s Lake and Reservoir Restoration Guidance Manual. Secchi in m Secchi TSI Chl - a ppb Chl TSI Total P ppb P TSI 9/15/ /26/ /4/ Oct /7/ Raw Data Data averages converted to Trophic State Index values

Carlson’s Trophic State Index

Where is the Fall Creek Pond on this scale?

Flushing Rate… What is it? Why is it important? How is it calculated?

Flushing Rate Calculations… To Determine Flow Rate – Inflow and Outflow Inflow =.2562 meters cubed/second = 22, meters cubed/day Outflow =.2246 meters cubed/second = 19, meters cubed/day Averaged =.2404 meters cubed/second = 20, meters cubed/day – Volume of the pond = 95,780 meters cubed – 95,780 meters cubed/20, meters cubed/day = 4.6 days of hydraulic residence time

Conclusion… Tying it all together New Map Flushing Rate Sedimentation Rate Trophic State