2011/2012 Fall Creek Pond Study - Wildlands School

kayakjokeMechanics

Feb 22, 2014 (3 years and 8 months ago)

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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 2011
-
12

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

9/15/2011

0.69



309



300





9/15/2011

1.524



91



189





9/15/2011

0.762



10



166

9/26/2011

1.1



100



264





9/26/2011

1.1



46



238





9/26/2011

1.37



86



212

10/4/2011

1.2



35



241





10/4/2011

1.5



17



388





10/4/2011

1.7



38



365

10/25/2011

0.61



123



254





10/25/2011

0.76



87



218





10/25/2011

0.76



90



395

11/7/2011

0.76



76



232





11/7/2011

0.69



68



551





11/7/2011

1.37



234



805

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

9/15/2011

1.0

60

136.7

78

218.3

80

9/26/2011

1.2

58

77.3

74

238.0

80

10/4/2011

1.5

55

30.0

65

331.3

80

25
-
Oct

0.7

65

100.0

75

289.0

80

11/7/2011

0.9

62

126.0

77

529.3

80

Raw Data

Data averages converted to
Trophic

State Index values

Carlson’s
Trophic

State Index

Where is the Fall Creek Pond

on this scale?

0
10
20
30
40
50
60
70
80
90
9/4/2011
9/14/2011
9/24/2011
10/4/2011
10/14/2011
10/24/2011
11/3/2011
11/13/2011
Trophic State Index Number

Date

Trophic State Index, Fall Creek Pond 2011
-
12

Secchi TSI
Chl TSI
P TSI
Oligotrophic

Mesotrophic

Eutrophic

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 = 22,135.68
meters cubed/day


Outflow = .2246 meters cubed/second = 19,405.44
meters cubed/day


Averaged = .2404 meters cubed/second =
20,770.56 meters cubed/day


Volume of the pond = 95,780 meters cubed


95,780 meters cubed/20,770.56 meters cubed/day =
4.6 days of hydraulic residence time



Conclusion… Tying it all together


New Map


Flushing Rate


Sedimentation Rate


Trophic

State