nutrient dynamics in streams of four land use types in the lake champlain basin allison jerram,...
TRANSCRIPT
![Page 1: Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley,](https://reader031.vdocuments.us/reader031/viewer/2022013011/56649d0a5503460f949dda48/html5/thumbnails/1.jpg)
Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin
Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley, Andy Vermilyea
![Page 2: Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley,](https://reader031.vdocuments.us/reader031/viewer/2022013011/56649d0a5503460f949dda48/html5/thumbnails/2.jpg)
Research Questions
How do nutrient concentrations in streams differ among land use types over time?
How does nutrient loading during storms differ among land use types?
![Page 3: Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley,](https://reader031.vdocuments.us/reader031/viewer/2022013011/56649d0a5503460f949dda48/html5/thumbnails/3.jpg)
Strategy and Site Selection
• Deploy identical in situ sensor suites in streams in Rhode Island, Delaware, and Vermont
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Wade BrookForested
Potash BrookSuburban
Hungerford BrookAgricultural
Land Cover for 3 VT Endmembers
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Sensor Selections• YSI EXO2
– Conductivity– Dissolved Oxygen– pH– Turbidity– Fluorescent Dissolved Organic Matter(fDOM)– BGA/Chlorophyll
• s::can Spectrolyser– Nitrate-N– Dissolved Organic Carbon– Total Organic Carbon– Turbidity– Full UV/Visible ‘Fingerprint’ scan
• Both sensors: 15 minute resolution
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Field Installations - Suburban
Solar panel
Datalogger
Battery Box
s::can sensor
EXO2 sensor
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Discharge Data Rating curves were developed for the forested
and suburban site USGS data were used for the agricultural and
mixed sites
![Page 8: Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley,](https://reader031.vdocuments.us/reader031/viewer/2022013011/56649d0a5503460f949dda48/html5/thumbnails/8.jpg)
Forested Site Rating Curve
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Variability in Nitrate Across Sites
![Page 10: Nutrient Dynamics in Streams of Four Land Use Types in the Lake Champlain Basin Allison Jerram, Andrew Schroth, Breck Bowden, Matthew Vaughan, Jamie Shanley,](https://reader031.vdocuments.us/reader031/viewer/2022013011/56649d0a5503460f949dda48/html5/thumbnails/10.jpg)
Relationship of Storm Discharge to Nutrient Export
How much of a certain nutrient enters the stream (and exported downstream) during a storm?
How is storm export different among land use types for a storm of the same size? How does this vary across storms and seasons?
Must normalize discharge and concentration data by including area in calculation
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Nitrate Export During Storms
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Y = 0.03x+0.10, R2=0.42
Y = 2.53x-0.55, R2=0.92
Y = 0.82x+0.13, R2=0.95
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Questions?
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Sensor QA/QC – Nitrate
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Sensor QA/QC – DOC
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.00.0
5.0
10.0
15.0
20.0
25.0
f(x) = 0.974448866504488 x + 3.53259680582608R² = 0.941771456514281
f(x) = NaN x + NaNR² = 0 Wade Brook
Linear (Wade Brook)Hungerford BrookLinear (Hungerford Brook)
Shimadzu DOC concentration (mg L-1)
S-c
an D
OC
con
cen
trat
ion
(m
g L
-1)