Newfound Water Quality Sampling: In Lake Sampling 8 Historic - - PowerPoint PPT Presentation

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Jan 30, 2023 331 likes •601 views

Newfound Water Quality Sampling: In Lake Sampling 8 Historic Sampling locations Initial Sampling in 1986 Standard Measurements include: Total Phosphorus, Chlorophyll and Secchi Disk Transparency Determine long term trends,

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Newfound Water Quality Sampling:

In Lake Sampling

– 8 Historic Sampling locations – Initial Sampling in 1986 – Standard Measurements include: Total Phosphorus, Chlorophyll and Secchi Disk Transparency – Determine long‐term trends, identify threats to the lake – Near‐Shore sampling and periphyton sampling to screen for “hot” spots.

Headwater Tributary Sampling

– Expansion of 2006‐2007 Water/Nutrient Budget – 6 Major Sub‐watersheds sampled: Black Brook, Cockermouth River, Dick Brown Brook, Georges Brook, Fowler River and Whittemore Brook – Emphasis on the collection of Total Phosphorus, Turbidity and Specific Conductivity data.

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Phosphorus and Algal Growth

10/1/2013

Phosphorus

Limiting Nutrient for

Most Fresh Waters

Tend to be “sticky”

so is transported by sediments and other matter

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0.12 0.10 0.09 0.08 0.08 0.08 0.08 0.07 0.07 0.06 0.06 0.06 0.06 0.04 0.04 0.04 0.03 0.03 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 Areal Phosphorus Load (Kg/Ha/Yr)

Wellington Brook Black Brook Dick Brown Brook Whittemore Brook Post Office Brook Hemlock Brook Yellow Brook Fowler River Georges Brook Cashman Brook Tilton Brook Cockermouth River Barn Brook Mason Brook Wilson Brook The Ledges Brook Hebron Brook Kendall Brook

Site

Newfound Lake

Areal Phosphorus Load by Tributary Sub-watershed

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Water Quality Sampling Stations And Catchment Watersheds

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Newfound Periphyton Study water Temperatures

(June 17, 2008 ‐ September 24, 2008)

10 12 14 16 18 20 22 24 26 28 30 6 / 1 7 / 2 8 6 / 2 4 / 2 8 7 / 1 / 2 8 7 / 8 / 2 8 7 / 1 5 / 2 8 7 / 2 2 / 2 8 7 / 2 9 / 2 8 8 / 5 / 2 8 8 / 1 2 / 2 8 8 / 1 9 / 2 8 8 / 2 6 / 2 8 9 / 2 / 2 8 9 / 9 / 2 8 9 / 1 6 / 2 8 9 / 2 3 / 2 8 Temperature (oC) Beachwood Fowler Hemlock Hebron

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2 4 6 8 10 12 14 16 18

chlorophyll a (mg/m2)

P-3 Beach P-4 Fowler P-5 Hemlock P-7 Hebron

Date

2008 Periphyton Inter-site comparison

22-Jul-08 14-Aug-08 26-Aug-08 24-Sep-08

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Summary:

Overall in‐lake water quality is excellent while

localized water quality variations are evident.

Threats exist
Long‐term trend of increasing chlorophyll and

decreasing Secchi Disk transparency at 2 Mayhew and Site 3 Pasquaney Bay

Major water quality fluctuations have been

associated with episodic precipitation events.

Phosphorus tends to enter the lake in a