Emriver Em2
Stream Table

The Emriver Em2 stream table is perfect for demonstrating river science and conservation principles to audiences of all ages and educational backgrounds. This model is optimized for ease of setup, use and portability.

Em2 specifications
Dimensions

Box 1.9 m x 0.8 m (6.2 ft x 2.6 ft);

Model footprint 2.29 m x 0.86 m (90 in x 34 in)

Portability Very portable.
Can be powered with a deep-cycle 12V battery. Can be stored in one square meter of floor space
Water 102 L (27 gal)
Media Amount 68 kg (150 lb)
Media Type Non color-coded
(can upgrade to color-coded)
Base Options Static
System Also Includes Reservoir, pump, power supply, flow controller. Modeling accessories: Measuring tape, quartz and plastic stones and rocks, acrylic shapes to simulate culverts, plastic vegetation, dye injection bottles for visualizing flow, scoops, and scrapers. User and laboratory manual, river geomorphology DVD.

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Download detailed specifications with photos.

UPGRADES

See the Applications for Science and Teaching pages for examples of how to use the Em2 for earth science, environmental scicence, geology, and more. Our model users include universities, K-12 schools, museums, and enviromental educators.

Unlike table-top stream tables, the Em2 is large enough to model a full range of fluvial phenomena such as meanders, oxbows, and delta formation. Our Em2 stream table is also engineered for portability: it stores in as little as three feet square of closet space and can be quickly set up in a classroom by a single person. You can also transport the stream table for on-location teaching with a small pickup truck or SUV and power it with a 12V marine battery. Despite its compact size, the Em2 can easily accommodate 10 hands-on learners plus a teacher. Adding a second row of observers can allow a whole class to gather at the stream table. The Em2 is very popular with elementary through high schools, nature and conservation centers, and colleges.

All of the standard instruments and accessories fit into the single, 27-gallon reservoir for storage or transport, and it is easy to fill the model with a garden hose or 5-gallon buckets from a utility sink. The included pump will drain the system in less than 5 minutes and can be used to rinse out the model after removing the media. The Em2 comes with heavy-duty engineered aluminum folding stands that create a standard box slope of 3.5 degrees. The slope can be lowered by putting an additional block under the downstream end of the table, and by raising the standpipe.

The Em2 comes standard with our Alpha thermoset plastic modeling media which is 60% lighter than sand, so it is easier to transport and models fluvial processes much more quickly. It also has a wider and more specific distribution of particle sizes than sand for a more accurate demonstration of channel morphology. Upgrading to color-coded-by size media opens the door to a deeper understanding of sedimentology and differential erosion, transport, and deposition. The Em2 uses 150 pounds of media packed in five, 5-gallon buckets for easy transportation and storage. Some of our users get their own 3-gallon buckets to make the carrying weight lighter.

I had the privilege of attending Winona State University where we had multiple stream tables and a large flume. These tools provided me a major advantage as a geoscience student, but they also played a key role in our department’s community education and outreach efforts. The tables naturally attract visitors of all ages! Children and parents alike let their curiosity guide them in conducting informal experiments – without even realizing it.

I also have to say, the staff working the tables at the Minneapolis GSA years ago were phenomenal folks. They so kindly gave me a mug (that I still use everyday!) for helping scoop sediment while they were busy with other visitors. We had a great conversation and it has always stuck with me what a difference it makes when you talk to people who clearly love their job. These people are passionate about their work. So if you have questions, I encourage you to reach out to them! It’s worth it!

Sadie Neuman

Winona State University graduate

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