developed by: r. axler and c. hagley updated: tischer creek: washburn edison middle school this...
TRANSCRIPT
Developed by: R. Axler and C. Hagley Updated:
Tischer Creek: Washburn Edison Middle School
• This slide show is adapted from slides used on 5/29/03 to introduce the website and discuss data collected by the 8th grade science class at Washburn Edison Middle School.
• It is viewable on-line via either the Netscape or Internet Explorer browsers and may be saved as a Powerpoint (.ppt) file for instructional use by educators.
• There are Notes attached to some of the slides that provide additional information.
[R.Axler 6/19/03; revised C.Hagley 7/8/03]
Developed by: R. Axler and C. Hagley Updated:
National Water Quality Monitoring “Day,” Oct 2002, and then beyond…
Tischer Creek: Washburn Edison Middle School
Developed by: R. Axler and C. Hagley Updated:
What’s the biggest, nastiest, costliest, most difficult to fix problem facing our streams ?
Developed by: R. Axler and C. Hagley Updated:
It’s not litter…
although trash and garbage add to the problem
Developed by: R. Axler and C. Hagley Updated:
It’s no longer pipes from factories and sewage treatment plants that dump toxins,
carcinogens, and….
Developed by: R. Axler and C. Hagley Updated:
It’s not from disease-causing microorganisms (pathogens),
although these can be a problem and are certainly linked to “it”
Developed by: R. Axler and C. Hagley Updated:
It’s not floods…
although they are more likely to occur because of “this” problem
1972 Brewery Cr @ 6th St and 6th Ave East
Developed by: R. Axler and C. Hagley Updated:
* USEPA
Many of the pollutants described contribute to Nonpoint Source Pollution
Polluted Runoff(Nonpoint Source Pollution)
The #1 water quality problem in the U.S.*
Developed by: R. Axler and C. Hagley Updated:
The stuff that washes in is either…
Dissolved –
• You usually can’t see it
• You are measuring EC25 to estimate total dissolved substances
• distilled water is ~ 0 uS/cm
• Lake Superior is ~ 90 uS/cm
• Tischer Creek has been ~ 150 to ~ 3000 uS/cm
• EC25 is a great indicator of road salt
• Road salt is a good indicator of how quickly pollutants can wash into streams
$50 hand-held
Developed by: R. Axler and C. Hagley Updated:
….or it’s
Particulate –
• Water gets cloudy (“turbid”)
• You use a transparency tube to estimate turbidity
• We use turbidity sensorsTurbidity increases due to
•high water from rainstorms
•snowmelt runoff
Developed by: R. Axler and C. Hagley Updated:
Automated stream water quality and stage height (flow) sensors
Developed by: R. Axler and C. Hagley Updated:
High chloride can be toxic to fish….
• But first you need to understand how chloride levels relate to electrical conductivity, the measurement that we collect on our streams.
Brook trout
Developed by: R. Axler and C. Hagley Updated:
How to estimate chloride from electrical conductivity (EC25) data
Developed by: R. Axler and C. Hagley Updated:
The first snowstorm of the season as seen by www.duluthstreams.org from October 21-22, 2002
Tischer Cr.Tischer Cr. Chester Cr.Chester Cr. Kingsbury Cr.Kingsbury Cr.
Higher chloride level = higher electrical conductivityHigher chloride level = higher electrical conductivity
(Look for(Look for darker blue darker blue to to magentamagenta))
Developed by: R. Axler and C. Hagley Updated:
…and then the 2nd snow on November 13, 2002
Drivers beware Cold weather and a heavy dusting of snow Wednesday afternoon contributed to a rash of traffic accidents in and around the Twin Ports. Between 12:40 and 3 p.m., 65 accidents were reported in Duluth and 5 more in Superior, according to the Duluth and Superior police. ...The black ice conditions forced the temporary closure of several hilly roads in Duluth, including parts of Mesaba Avenue, until sand and salt trucks could ... Source: Duluth News-Tribune (MN)
Developed by: R. Axler and C. Hagley Updated:
National Water Quality Monitoring “Day” Oct 2002 and then beyond…
Tischer Creek: Washburn Edison Middle School
Developed by: R. Axler and C. Hagley Updated:
0
20
40
60
80
100
120
140
160
0 20 40 60 80 100 120 140 160
Transparency Tube (cm)
Tu
rbid
ity
(NT
U)
Turbidity Transparency(lab NTU) (cm)
4.0 352.3 1202.5 12022.5 4334.7 402.4 80
135.2 729.2 106.1 1001.8 1201.2 1201.3 103
Tischer @ Washburn (Oct-Nov 02 & Apr-May 03)
Here’s your transparency tube data plotted against turbidity
Developed by: R. Axler and C. Hagley Updated:
Here’s your transparency and turbidity data vs our automated sensors downstream
MAY 19 – RAIN!
• The creek “came up” (stage height increased)
• The water “clouded up” (turbidity increased)
10
cmMAY 20 – NO RAIN
• The creek “came down” (stage height decreased)
• Water cleared (turbidity down)
10
0 c
m
• Washburn turbidity tube – only 10 cm!
• Washburn turbidity tube – now 100 cm
Developed by: R. Axler and C. Hagley Updated:
Invertebrate Stream Quality Indices
• Varying degrees of sensitivity to water quality
• Easy to collect and identify
• A key resource to be protected (fish food)
• Specific pollutants are expensive to measure
• Chemical changes are “flashy” – you might miss the peak levels, but the bugs won’t
• Which ones are you going to measure?
Developed by: R. Axler and C. Hagley Updated:
Many types of Invertebrate IndicesMany types of Invertebrate Indices
Washburn-Edison used a Stream Quality Assessment
I (3 pts): Dobsonfly, Caddisfly, Stonefly, Mayfly …
II (2 pts): Dragonfly, Damselfly, Crayfish, Scud, beetles, clams …
III (1 pts): Blackfly larvae, Midge larvae, worms, leeches, snails (left)…
Developed by: R. Axler and C. Hagley Updated:
Stream Quality Assessment Index
Tally the number of major groups seen (such as Caddisflies or clams)
Score by tolerance: I = Sensitive = 3 points II = Semi-sensitive = 2 points III = Tolerant = 1 point
Sum the points to characterize water quality:Sum the points to characterize water quality:
>> 23 23 Excellent Excellent 11-1611-16 FairFair
17-22 17-22 Good Good << 10 10 PoorPoor
Developed by: R. Axler and C. Hagley Updated:
Summary of Class Data – 7 groups
Washburn-Tischer Cr Invertebrate Index
0
10
20
30
1 2 3 4 5 6 7
Group #
SQ
A o
r P
TI
Mean Score: 21
GOOD
Range: 13-25
Median: 23
Mode: 23
Developed by: R. Axler and C. Hagley Updated:
Washburn Edison
Tischer Cr
Map–based data: from a Geographic Information (GIS) System
Other DuluthStreams Data - Check out the GIS Utility
You can zoom in and overlay streams, roads, land uses, etc.
Developed by: R. Axler and C. Hagley Updated:
The rest of these slides are leftover from other talks and may be useful to teachers
for introducing the website
Developed by: R. Axler and C. Hagley Updated:
Duluth has 42 named streams High density for size of urban area
DuluthStreams “Rationale”
Developed by: R. Axler and C. Hagley Updated:
Stormwater issues
Like many urban streams across the country, Duluth streams face a number of environmental threats related to stormwater runoff
Developed by: R. Axler and C. Hagley Updated:
Goal of DuluthStreams
Enhance public understanding of aquatic ecosystems and their connections to watershed land use to provide both economic and environmental sustainability
www.duluthstreams.org
But with a focus on collecting and presenting real-time data