dcslideshowcompresse dwithsoundlooped

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Published on April 17, 2008

Author: Vilfrid

Source: authorstream.com

Slide2:  THE FLUME ON THE MALL: BRINGING RIVER RESEARCH TO LIFE FOR THE PUBLIC NCED: Jeff Marr, NCED Engineer and Stream Restoration Project Manager Michal Tal, University of Minnesota PhD candidate in Geology & Geophysics Karen Campbell, Director of Higher Education and Knowledge Transfer Travis Sandland, Science Museum of Minnesota Earthscapes Teacher NCED Partners: Gordon Grant, Pacific Northwest Research Station, USDA Forest Service Karen Bennett, Watershed Program Manager, Siuslaw National Forest Slide3:  In 2005, the Forest Service celebrated its 100th anniversary and was featured at the annual Smithsonian Folklife Festival. Motivated by this opportunity to engage thousands of festival visitors with the agency’s role in river research, the Pacific Northwest Research Station and the National Center for Earth-surface Dynamics (NCED) designed a 3-part exhibit on various aspects of river dynamics that was assembled on the National Mall. One model was a 25 foot research flume designed for experiments in river planform dynamics. Two experiments were conducted in the 25 foot flume over the 12 day festival run. The first experiment investigated the response of a vegetated meandering channel to sediment pulsing; the second involved the response of a braided system to the introduction of log-jams and woody debris during floods. Visitors learned about channel patterns, system disturbance, and sediment transport and were able to see how data is collected in experimental studies. Slide4:  A second model was of the Glines Canyon Dam on the Elwha River in the Olympic National Park. This interactive model was based on a larger experimental model at NCED. Visitors learned about sediment storage in reservoirs upstream of dams and the considerations in dam-removal of how this sediment will be delivered to the downstream river environment. The third component in the exhibit was a large sand and concrete stream table sculpted onsite to illustrate watershed processes. Here, again, visitors had a hands-on opportunity to explore the meaning of floodplains and the issues associated with human development near rivers. Public enthusiasm for all three exhibits was overwhelming, with many visitors returning daily to follow experimental progress. Slide5:  Test assembly of 25 ft research flume on SAFL’s lower deck Slide6:  Fully assembled with camera racks and reading rails Slide7:  The flume in pieces, ready to be loaded for transport to DC Slide8:  Packing up Slide9:  Loaded up… Slide10:  ….ready to go Slide11:  The empty tent on the Mall, awaiting flume assembly Slide12:  Flume pieces ready to be assembled in the tent Slide13:  Assembling the frame Slide14:  Folklife festival volunteers help with assembly Slide15:  The flume takes shape Slide16:  Volunteers help with assembly Slide17:  Flume and streamtable assembled Slide18:  Jeff Marr, NCED Engineer, assembling flume and stream table on the Mall Slide19:  Sand in place Slide20:  Sediment feeder Slide21:  Volunteers help spread sand Slide22:  Mountains sculpted in watershed stream table Slide23:  Braided unvegetated channels from above, taken by a flume-mounted camera Slide24:  Sowing alfalfa seeds Slide25:  Seeded flume Slide26:  Hanging the Elwha River poster Slide28:  View of the Mall from Flumeland Slide29:  Gordon Grant records topography measurements Slide30:  Dr. Gordon Grant, NCED collaborator, with a visitor on Opening Day Slide31:  Greeting Opening Day visitors Slide32:  Hanging floodlights for the cameras Slide33:  Flume with banner Slide34:  Use a pebble to vote: will the experiment yield a braided or a meandering river? Slide35:  Visitors vote that the river will ultimately braid Slide36:  Visitors learn about the vegetation experiment Slide37:  NCED graduate student Michal Tal with the stream table Slide38:  Travis Sandland instructs a visitor in sediment-feeding in the Glines Canyon model Slide39:  Michal with the dam removal model Slide40:  Visitors learn about removal of the Glines Canyon Dam on the Elwha River, using scaled version of NCED research model Slide41:  Gordon Grant and Travis Sandland measure the topography of the vegetated river. Slide42:  Visitors watch a flood on the vegetated river Slide43:  Narrating a flood… Slide44:  Gordon Grant with young scientists Slide45:  Travis Sandland observing river behavior with visitors Slide46:  June 30: the 100 year flood clears out the dying vegetation to make way for Experiment 2 Slide47:  Gordon Grant narrated the 100 year flood Slide48:  Visitors filled the tent for the 100 year flood Slide49:  Visitors fill the bleachers to watch the first flood of Experiment 2 Slide50:  Visitors learn about the behavior of log jams in rivers Slide51:  Gordon Grant explains the movement of logs in Experiment 2 Slide52:  Gordon Grant recruits the next generation of fluvial geomorphologists Slide53:  Young visitors build communities in the watershed streamtable Slide54:  Visitors often lingered long after the flood subsided to learn more Slide55:  Young visitors add sediment to the Lake Mills delta Slide56:  Gordon Grant and Michal Tal Slide57:  Back on to the truck for the return trip Slide58:  Jeff Marr and “Trucker Tom” unloading at St. Anthony Falls Lab

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