Come see us at the Earth Educators' Rendezvous, July 20-23, 2026, at the University of South Carolina in Columbia, South Carolina.

Em3 Stream Table

Em3 Stream Table

A modular and sizable system perfect for teaching of river science principles. The 3-meter basin provides greater capabilities than the Em2, but still fits easily into classrooms, labs, museums and nature centers, where it can be used for a single teaching unit or an entire semester-long course.

Em3 at the Louisiana Art and Science Museum
Em3 with a nice delta
Em3 Single Tilt
Em3 at Carbondale Community Arts
Em3 with Lone Oaks Lab crew

Drag to rotate

Designed for a Lab Space or Classroom

Flow Outlet

Flow Outlet

The moveable Flow Outlet pipe introduces water into the Stream Table. Many Em3 users upgrade to the K500 Digital Flow Controller.

Em3 Box

Em3 Box

The welded aluminum box features T-Slot gunwales for mounting instruments and controllers.

Modeling Media

Modeling Media

The Em3 comes standard with 108 kg (240 lb) of non color-coded media. Color-coded media is available as an upgrade.

Reservoirs

Reservoirs

Two reservoirs are connected by a gravity feed hose for a total capacity of 151 L (40 gal).

Optional Dual-Tilt base

Optional Dual-Tilt base

The Em3 comes standard with static supports and can be upgraded at any time to a single or dual-axis tilting base.

Standpipe

Standpipe

The standpipe moves up and down to control stream slope.

Leveling Casters

Leveling Casters

The leveling casters allow the Em3 Tilt Base to be positioned in the lab or classroom and precisely leveled.

Specifications

Dimensions
Box: 3 m x 1 m (9.8 ft x 3.2 ft)
Model Footprint: 3.25 m x 1.02 m (128 in x 40 in)
Portability
Moderately portable
Can be powered with a deep-cycle 12V battery
Water
151 L (40 gal)
Media Amount
108 kg (240 lb)
Media type
Non color-coded (can upgrade to color-coded)
Base options
Static, single, and dual-tilt
System includes
Reservoirs, pump, power supply, flow controller, sediment trap, energy dissipating unit. Modeling accessories: Measuring tape, limestone and plastic rip-rap, acrylic shapes to simulate culverts, plastic vegetation, dye injection bottles for visualizing flow, scoops, and scrapers. User and laboratory manual.
Upgrades
The following modular options can be added at any time: Color-Coded media, Tilting Base, Accessories, Instruments.

The extended length of the Em3 allows the stream to develop longer running and more varied features in a river channel. For example, one bank on a meander bend can feature hard armoring while another can feature simulated vegetation to simultaneously demonstrate the effects of different methods of river management. The added length also provides space for a larger downstream pool and longer developing deltas, and, with the addition of a Wave Maker, demonstrations of coastal morphological phenomena such as longshore drift.

A class of 15 plus a teacher or facilitator can participate with the Em3, with a second row of 15 observers, so it’s a perfect choice for hosting school groups and field trips. The Em3 stream table is designed to be set up and put away by two people, and can be transported in a full-size pickup or cargo van for outreach and education events. It can also be powered onsite by a 12V marine battery. The Em3 stream table is popular with high schools that have dedicated geology labs, colleges, nature centers and museums, and universities.

The standard static supports are engineered from high-strength aluminum and create a box slope of 3 degrees or 5%. Decreasing the slope is as simple as raising the standpipe water level or inserting a support under the table’s downstream end.

An exciting upgrade to the Em3 and Em4 models is a single- or dual-tilt base. With the single-tilt base, a handwheel controls the box slope continuously from zero through 3.5 degrees through a robust gearbox and acme screw system. The box tilt may be easily and quickly changed as the model is running to dynamically model and demonstrate the effects of changing slope or geologic uplift. The dual-tilt option allows the user to additionally change side-to-side roll through a +3 degree range to further explore geologic change to the river basin. The stream in the table responds rapidly and dynamically to these changes, making the single or dual-tilt base a unique research, learning, and teaching tool.

The Emriver Em3 comes standard with 240 pounds of our Alpha thermoset plastic modelling media as described above, and can be upgraded with color-coded media.

We have used the Emriver Em3 fluvial geomodel to demonstrate a variety of processes and resulting morphologies to undergraduate students. We’ve demonstrated different channel types, channel migration, point bar development and cut banks, meander cut-offs, erosional terracing, knickpoint migration, channel incision, delta development, the effects of base level on the depocenter, and delta-lobe switching. Overall, this geomodel has been a very useful educational tool to provide a visual example for some basic concepts of fluvial and deltaic geomorphology.

Dr. Ioannis Georgiou
Professor Gratis
The University of New Orleans

We used the stream table in our intro-level lab this semester, and students enjoyed seeing it in action. Our students gained a greater understanding of meandering river processes and a better grasp of the landforms formed by rivers through the stream table. A master’s student will be using the stream table next year to help him with his thesis.

Dr Carol Sawyer
Associate Professor of Geography and Geographic Information Systems
University of South Alabama

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.

Sadie Neuman
Graduate
Winona State University