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Environmental Studies
Mr. SkirbstScienceTopic 28
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SurveyingGoal of the surveying team is todetermine the stream gradient
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SurveyingGoal of the surveying team is todetermine the stream gradient
Stream gradient: stream slope
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SurveyingStream slope = rise / run
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SurveyingStream slope = rise / run
In the field: rise = (determined by surveying)
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SurveyingStream slope = rise / run
In the field: rise = (determined by surveying)run = (calculated using the
Pythagorean Theory)
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SurveyingSurveying: Using instruments to make
measurements of the land
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Surveying Terms
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SurveyingData Table:
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Bench Mark (BM)
Transit
Stream Slope
Line of site
Cross hairs
Rod
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Bench Mark (BM)
Transit
Cross hairs
BB
D
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Bench Mark (BM)
Transit
Cross hairs
BB
D
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Cross hairs
BB
D
Rise
Run
Stream
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BB
D
Rise
Run
Stream
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Rise
Run
StreamRise
Run
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Rise
Run
Stream
(Stream)2 = (Rise)2 + (Run)2
Pythagorean Theory
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Stream Team
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Stream TeamGoal of the stream team is todetermine the stream discharge
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Stream TeamGoal of the stream team is todetermine the stream discharge
Stream discharge- water volume released in a period of time
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Q (disc
harge)
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Stream Team
Volume =
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Stream Team
Volume = width x height x length( 3 dimensions)
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Stream Team
Volume = (width x height) x length
Discharge (Q) = area x velocity(cubic feet per second)
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Stream Team
Stream width –
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Stream Team
Stream width –Distance from bank to bank at
the cross-section
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Stream Width
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Stream Team
Stream depth–
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Stream Team
Stream depth– average depth along the cross-section
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Stream Team
Stream depth– average depth along the cross-section
(must be average since depth is not uniform)
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Stream Team
Average depth determined by taking depths at regular intervals and dividing by number of intervals
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Stream Depth
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Stream Team
Stream area = width x depth(2 dimensions)
(feet2)
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Stream Team
Stream length –
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Stream Team
Stream length = stream speed
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Stream Speed
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Stream Team
Stream length = stream speed
Speed (velocity) = distance/time
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Distance
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Distance
Time
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Distance
Time
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Stream Team
Stream length = stream speed
Speed (velocity) = distance/time(feet/second)
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Stream Team
Discharge (Q) = area x velocity
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Stream Team
Discharge (Q) = area x velocity
units = cubic feet per second(ft3/sec)
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Tree Team
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The goal of the tree team is to calculate the % canopy cover, measure the tree density, and identify species of trees.
Tree Team
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Tree Team
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Tree Team
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http://www.arborday.org/trees/whatTree/whatTree.cfm?ItemID=E6A
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Soil Team
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The goal of the soil team is to analyze the texture, chemistry, and biology of the soil.
Soil Team
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Soil texture -
Soil Team
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Soil texture – how the soil feels
Soil Team
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Soil texture – the composition of soil in terms of the relative amounts of clay, silt, sand, and gravel.
Soil Team
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1. Clay – < 0.002 mm2. Silt –3. Sand –4. Gravel –
Soil Team
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1. Clay –2. Silt – 0.002 mm to 0.05 mm3. Sand –4. Gravel –
Soil Team
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1. Clay –2. Silt –3. Sand – 0.05 mm to 2.0 mm4. Gravel –
Soil Team
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1. Clay –2. Silt –3. Sand –4. Gravel – > 2.0 mm
Soil Team
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Method for determining texture
Soil Team
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Method for determining textureSettling Rate:
Soil Team
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Method for determining textureSettling Rate:Larger particles settle first,
followed by smaller particles
Soil Team
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Soil Team
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Method for determining textureSoil Sieve:
Soil Team
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Method for determining textureSoil Sieve:Passing soil sample through a
series of sieves to separate particle sizes
Soil Team
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Soil Team
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Soil Team
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Soil Biology:Extracting the organisms in the
soil for observation
Soil Team
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Soil Biology:Extracting the organisms in the
soil for observationMacroinvertebrates – “big bugs”
Soil Team
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Soil Biology:Extracting the organisms in the
soil for observationMacroinvertebrates – “big bugs”Microinvertebrates –“small bugs”
Soil Team
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Extraction of organisms:Berleese funnel
Soil Team
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Soil Team
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Soil Chemistry:Analyzing the soil nutrients that
support plant life
Soil Team
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Soil Chemistry:Analyzing the soil nutrients that
support plant lifeNPK
Soil Team
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The goal of the water team is to determine the biological health of the stream.
Water Team
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Sample locations:
Water Team
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Sample locations:A, B, C, D (work FROM
downstream TO upstream!)
Water Team
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Sample technique:
Water Team
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Sample technique:Kick net – “kick up” sediment in
2ft2 area downstream of net
Water Team
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Sample technique:Kick net – “kick up” sediment in
2ft2 area downstream of net
Catch net – hand net
Water Team
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Benthic macroinvertebrates:
“bottom” “big bugs”
Water Team
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Pollution Tolerance Index (PTI):
Water Team
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Pollution Tolerance Index (PTI):A measure of how tolerant the
benthic macroinvertebrates are to pollution.
Water Team
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Pollution Tolerance Index (PTI):A measure of how tolerant the
benthic macroinvertebrates are to pollution.
Value 1 -4 (1 = very health4 = not healthy)
Water Team
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Water Team
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Reporter – work with others in team to interview everyone
Support Team
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Reporter – work with others in team to interview everyone
Photographer – take pictures of everyone doing their job
Support Team
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Reporter – work with others in team to interview everyone
Photographer – take pictures of everyone doing their job
Videographer – video everyone doing & explaining their job
Support Team
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