East Pond Data 2008
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5/3/2008: 

King launched the Colby pontoon boat.  Sampled for nutrients 69.76657 W, 44.5964 N in stream outflow near boat launch, and took a lake profile at Colby A (DEP1). 



Notes

Profile

Colby A

Bottles 4, 5 - 1 meter; 6, 7 - 3 meter; 8, 9 - 6 meter.  Whole samples.

 

Colby  A

CTD profile

 

Colby A

Secchi Depth: 2.67 Meters

 

Colby A

Wind calm, light rain




 On 5/3 East Pond is well mixed from top to bottom as illustrated by the uniform temperature and oxygen profiles shown below.   The fluorescence is high in the lake, consistent with the shallow Secchi depth.  The lake is relatively cold, but could warm up quickly with a few warm, sunny days.   Given the shallow Secchi depth, we expect most of the warming to occur in the top 2-3 meters.   Significant rain or wind events will distribute the heat deeper in the lake.



5/14/2008: 

King installed the weather station and sampled Colby A (DEP1) for nutrients and measured O2, T, FL, and pH

Activity

Location

Notes

Profile

Colby A

1 meter filtered - 1A

 

 

1 meter unfiltered - 2B

 

 

5 meter filtered - 3C

 

 

5 meter unfiltered - 4D

 

Colby  A

EP ColbyA0514a.xls

 

Colby A

Secchi Depth: 3.5 Meters

 

Colby A

Wind calm, sun





 On 5/14 East Pond is generally mixed with a hint of surface warming in the top 0.5 meters of the lake.  The profile was taken at 3 PM so the warming is a normal daily event due to absorption of sunlight.  The Secchi depth has deepened by 0.6 meters to 3. 5 meters in the last 11 days.   This deepening is consistent with the fluorescence profile that shows significantly less chlorophyll in the top 2 meters.

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5/22/2008

Colby and UMO groups sampled both East and North Pond.

Activity

Location

Notes

Profile

Colby

EP ColbyA0522a.xls

 

UMO






 On 5/22 East Pond and North Ponds are  mixed at 15 oC.      The Secchi depth in East Pond has deepened by almost two meters to 5.4 meters in the last 8 days.   This deepening is consistent with the fluorescence profile that shows significantly less chlorophyll above 4.5 meters.  


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