Wednesday, December 11, 2013

Field Trip to West Eugene Wetlands

On 12/3/13, the Kinder River Spies and the 1st/2nd Grade River Spies explored West Eugene Wetlands near West 11th and Danebo Avenue. Susanna Hamilton, an environmental educator from Willamette Resources & Educational Network (WREN) and her team of volunteers (Ron Leonard and Mackenzie Cowan), led our explorers through the wetlands. The River Spies learned about the components of a wetland, inspected plants, identified wetland creatures, and found clues that signified the presence of various animals. We saw evidence of beavers, nutria, birds, raccoons, and insects. Susanna kept us warm on an especially brisk day by interspersing stops along the trail with jacks, jumps, duck waddles, and high knee runs! The River Spies walked trails through the wetlands and along a portion of Amazon Creek that parallels West 11th heading toward Fern Ridge Reservoir.
A tree used by raccoons as a communal toilet!

A Doug Fir cone. Easy ID clue: 
appears as though mice have crawled underneath the bracts.

Defining a wetland.

A branch gnawed by beavers and beaver teeth.

Collecting rose hips for closer inspection.

River Spies ask excellent questions!



Water Filters and Testing Water Properties

On 11/19/13, the Kinder River Spies created their own water filters out of soda bottles, coffee filters, sand, and gravel. We tested each water filter's ability to clean "dirty" water. This activity allowed the kids to observe filtration rates through different types of soil and to witness soil's capacity for trapping pollutants. 

Here are all the Kinder River Spies with their water filters: 
Fin

Sasha

Aarav
Maya
Elena

The 1st/2nd Grade River Spies explored water properties through several demonstrations and activities. They tested various household substances to determine pH levels and predicted the turbidity of different substances suspended in water. 

They also explored surface tension by figuring out how to float a paper clip on top of water.
We recapped our Amazon Creek clean-up by modeling 2/3 of a cubic yard (total trash collected) with student bodies. That's a lot of trash!

Monday, November 18, 2013

Amazon Creek Clean Up


Kinder River Spies hauling away a blanket

The Kinder and the 1st/2nd Grade River Spies decided to undertake an action project to improve the water quality of Amazon Creek. On 11/12/13, the River Spies embarked upon our first ever Amazon Creek Clean Up.

The 1st/2nd Grade River Spies found this sign along Amazon Creek banks.
The sign 
says "No Garbage Dumping"!

We started near the dog park at 29th & Amazon and moved north along Amazon Creek from there. With 45 minutes allotted for each group, the River Spies collected as much trash as possible in and along the creek. I have never seen kids so excited about picking up trash!


Armed with gloves, buckets, bags, squeeze handles, and boots, the River Spies picked up an astounding array of debris: plastic bags, food wrappers, cans, glass bottles, blankets, tarps, clothes, shoes, shave cream, masking tape, and balls.


A gigantic thank you to Carrie Karl of Eugene Park Stewards for loaning us supplies and for hauling away our trash collection at the end. All total, the River Spies extracted 2/3 of a cubic yard of trash from Amazon Creek!

Monday, November 11, 2013

Watershed Models in a Tray


On 11/5/13, the Kinder River Spies created watershed models out of paper and water soluble markers. We added precipitation (via a spray bottle) to the models and watched as watersheds formed. This simple project clearly shows how water travels from ridges to basins and how gravity pulls water down the "mountains" through the path of least resistance.  

Watershed Model 

Adding water soluble markers to paper ridges


The 1st/2nd Grade River Spies designed watershed models in trays with sand, gravel, sponges, and wooden blocks. They had wildly different and unique designs! Before testing the models, the River Spies predicted how water would flow over their landscapes. 


Rory and Julia

Greta and Avi

Nora and Jocelyn

Jayling and Lena

Brennan and Levi

Monday, November 4, 2013

We Took the World Water Challenge!


Amazon Creek in Amazon Park

On 10/29/13, the River Spies participated in the World Water Monitoring Challenge by collecting data from Amazon Creek in Amazon Park (Kinder River Spies) and at the intersection of Amazon and Fox Hollow (1st/2nd Grade River Spies). Our hardy teams of young investigators measured water temperature, turbidity, dissolved oxygen, and pH levels. 


Amazon Creek and Fox Hollow


Temperature
The Amazon Creek sites had a water temperature of 10℃. Aquatic organisms need a certain temperature range to survive and thrive. For a frame of reference, trout and salmon require cool water no greater than 20℃ to survive. Salmon and steelhead need water temperatures less than 13℃ to spawn.

1st/2nd Grade River Spies analyzing a water sample

Turbidity

The Amazon Creek sites had a turbidity reading of 0 JTU. In general, the less turbid (or less suspended particles) the better. Suspended particles can clog fish gills, smother eggs, block sunlight needed by aquatic plants, and raise water temperature by absorbing heat.

Dissolved Oxygen
With a DO reading of 4ppm, our Amazon Creek site was about 35% saturated. Cold water can hold more dissolved oxygen than warm water before it is 100% saturated. Bodies of water with high dissolved oxygen levels provide healthy and stable environments for a variety of aquatic organisms. 


Mixing the pH reagent 


Comparing pH with a color results sheet

pH

Our Amazon Creek site had an average pH of 7.0. A majority of freshwater organisms live within a pH range of 5.5 to 7.5.

I entered our data from 10/29/13 on the World Water Monitoring website: http://www.worldwatermonitoringday.org



Monday, October 28, 2013

Compass Directions, Scavenger Hunts, and the pH Scale


On 10/22/13, the Kinder River Spies and the 1st/2nd Grade River Spies participated in a water feature scavenger hunt. Our detectives used clues and compass directions to find water features in close proximity to Edison Elementary. I also wanted to gauge the River Spies endurance levels for a possible field outing - by foot - to Amazon Creek. We may have to wait on that one! 

The Kinder River Spies did a mini scavenger hunt, so we also had time to explore the pH scale with some common household items. We tested the following substances of varying pH: lemon juice (2), milk (6.5), water (7), baking soda (8.5), and soap (10.0).


pH stands for "the power of hydrogen". On a scale from 1-14, one represents the most acidic and fourteen represents the most alkaline. Pure water has a pH of 7.0. Most aquatic animals live in water with a pH range of 6.5-8.2.



Water Quality Investigations

On 10/15/13, all of the River Spies sampled for aquatic macroinvertebrates in Amazon Creek. The Kinder River Spies tallied diversity and abundance near the intersection of Amazon & Fox Hollow. The 1st/2nd Grade River Spies identified and counted aquatic macroinvertebrates in the Amazon Creek headwaters near Martin Street. 


Amazon Headwaters along Martin Street Trail
View downstream of the Amazon Headwaters site
Amazon Creek near Fox Hollow.

Macroinvertebrates are animals that lack a backbone and can be seen with the unaided eye. "Aquatic" refers to animals that spend most of their lives associated with bodies of water. These animals are excellent bioindicators - their presence, abundance, and diversity  indicates the health of a stream, river, lake, wetland, or other aquatic environment. Macroinvertebrates are grouped according to their tolerance to pollution. 


Fin discovers an aquatic snail.


Greta and Jayling identify an aquatic macroinvertebrate found under a rock. 

The 1st/2nd Grade River Spies also conducted water quality testing by measuring temperature, dissolved oxygen (DO), pH, and turbidity.


Learning how to sample for temperature, DO, pH, and turbidity

The Kinder River Spies rated the water quality as poor at the Amazon & Fox Hollow site. The 1st/2nd grade River Spies rated the water quality as fair at the Amazon Headwaters site. I loaded our data on to StreamWebs™  - an online water quality data base managed by OSU: http://streamwebs.org

I entered our temperature, DO, pH, and turbidity data on the World Water Monitoring website: http://www.worldwatermonitoringday.org

Monday, October 14, 2013

Water Pollution, Surface Tension, and Macroinvertebrate Match Game


On Tuesday 10/8/13 the Kinder River Spies focused on water pollution
We asked and answered several questions: 
Where does pollution originate? Can we see all water contaminants with the unaided eye? How do pollutants affect eggs and nesting animals? 
The kids already knew a fair amount about potential water contaminants. 
They identified fertilizers, pesticides, motor oil, pet waste, litter, and excessive dirt as sources of water pollution.

Examining an oil soaked egg


After the River Spies had mentioned motor oil as a contaminant, we conducted an experiment to test how eggs (hard boiled) faired when immersed in oil (cooking oil). We peeled an egg after 10 minutes and then one after 30 minutes. The oil soaked through the porous shell membrane and coated the inside of the eggs. The shell of the egg that soaked for over 30 minutes was soft and disintegrating! 
The kids could easily relate the results of our experiment with the devastating effect motor oil can have on ground nesting animals.


The River Spies had a rare opportunity to "taste" an experiment in which invisible "pollutants" were dissolved in tap water. I added lemon juice, salt, and sugar to various cups and had the kids sample the mixtures. This simple demonstration introduces the fact that not all pollution can be seen. Clear water is not necessarily clean water!

On Tuesday 10/8/13 the 1st/2nd Grade River Spies practiced identifying aquatic macroinvertebrates and explored surface tension.
Earlier, I had collected some specimens from Amazon Creek so the River Spies could match real invertebrates with a corresponding identification sheet. Our young detectives demonstrated excellent powers of observation! 
Examples of a few invertebrates that we identified:

Blackfly Larva
Mayfly Larva

Caddisfly Larva
 We also guessed how many drops of water one could place on a penny before the water spilled over the edge. Surprisingly, some of the River Spies managed to fit over 100 droplets on the penny's surface. The kids deduced that water is "sticky". The polarity of water molecules causes them to stick together - the hydrogen atoms carry a positive charge and the oxygen atom carries a negative charge.

Drops on a penny


Sunday, October 6, 2013

Field Trips to Amazon Creek and a Rain Garden


On 10/1/13, the 1st/2nd Grade River Spies searched for aquatic macroinvertebrates at Amazon Creek. The recent rains meant deeper water and sloshy boots! 


The River Spies found dragon nymphs (invertebrates) and several juvenile fish. 

Nora & Levi. Nora was our star collector for the day!
The fish were temporarily placed in a holding bin with the dragonfly nymphs so we could better observe them. We soon discovered that a dragonfly nymph was "missing" or had been predated. We will know next time to separate our invertebrates from our vertebrates!

Greta, Jocelyn, and Lena inspect our samples.


 Our first field trip for the Kinder River Spies was to a rain garden at the Willamette Center (27th & Willamette Street). 



This rainscaping project is the first of its kind in Eugene. Commercial property owners, private investors, the City of Eugene, and the Long Tom Watershed Council (LTWC) have collaborated to retrofit an existing building to manage storm water. The building's proximity to Amazon Creek lends to the importance of reducing and treating runoff for healthier and safer urban waterways.

We used our senses of sight, sound, touch, and smell to make observations.

We recorded the water temperature at 12°C and measured the pH at 7.5.
For more information on the Long Tom Watershed Council and projects in our area, 
check out their website: http://www.longtom.org/