Flooding in the Midwest : Image of the Day. Drought Turns to Deluge in California : Natural Hazards. Why Do Rivers Have Deltas? Triple Divide Peak, Montana - EPOD - a service of USRA. Provided by: Tom Kotynski, Great Falls Tribune Summary authors & editors: Rod Benson The peaks shown in the above photo are glacial horns located in Glacier National Park, Montana.
These pyramid-shaped features are formed as three or more glaciers erode the sides of a single mountain. The larger horn in the background is Mt. Stimson and the smaller one near the middle is Triple Divide Peak. It was given its name because runoff from each of its three sides drains into a different body of water. The hikers are near the ridge that separates the Hudson Bay and the Gulf of Mexico. The photograph was taken looking toward the southwest. Related Links: NWS JetStream Learning Lesson: Water Cycle Paper Craft. Overview Water moves from the ground to the atmosphere and then returns to the ground, however, the actual path water takes in its cycle is more complicated.
There are many stops on water's journey. Students will learn how the water cycle works using 3-D paper craft activity. Thompson Canyon FlashFlood(comp) River Systems: Process and Form. Compiled by Jeff Crabaugh at Carleton College (more info) (SERC) and the University of Wyoming This section provides access to a number of visualizations and supporting material that can be used effectively to teach students about physical processes acting in rivers and their floodplains.
Visualizations include simple animations, visual output from numerical models, as well as numerous static illustrations and photos. For more visual resources, browse the complete set of Visualization Collections. Rivers Terrestrial Animations This set of animations from the Community Surface Dynamics Modeling System (CSDMS) group contains 16 movies of various river processes. Braided River Videos: In Nature and Lab. Terrace Formation and Evolution. Oxbow Lake Formation (more info) From Wycombe, this Flash slide show renders a detailed five step analysis of oxbow lake formation.
Meander Migration Animations: Thames Valley, England. Floods: NASA Astronaut Photos from Space. Dryland Rivers. Deltas. Earth from Space - Image Information. River Systems: Process and Form. SVS: The Rivers of the Mississippi Watershed. Water Cycle - Earthguide Animated Diagram. Harold Fisk’s Incredible Maps Track the Ghosts of the Mississippi. In 1944, Harold Fisk had been following ghosts for three years.
His ghosts were of the meandering Mississippi. A river, big or small, doesn’t stay still – as its waters flow it carves out new paths in a route towards its ultimate destination. Over time, the bends and curves of what seems like a static river snakes into new outlines. By looking at the geologic evidence, you can even map many of the paths a river once took – like looking at the past lives of the waters, the river’s ghosts.
In a report for the US Army Corps of Engineers, in 1944 Fisk had completed a mammoth effort entitled, “Geological Investigation of the Alluvial Valley of the Lower Mississippi River” (downloadable here). And here are all 15 maps, laid end-to-end. These are some of the most beautiful maps I have ever seen, especially considering that these were created in a time without computer graphics. You can download the hi-res versions of Fisk’s maps here. Why Do Rivers Curve? Classroom Activity. Objective To construct a model of a river system with levees. copy of "Overflowing the Banks" student handout (PDF or HTML)A large flat container or tray with sides, such as a wallpaper trayor aluminum baking panA sufficient amount of modeling clay to cover the bottom of the panwatersome spongesdrawing paperpencils St.
Louis, Missouri, was protected from serious flood damage because of the walls that were built to hold the river on course even in predicted maximum flooding conditions. The first model will show what would happen without any human interference in the banks of the river. When flooding conditions occur, the entire floodplain is covered with water. Online Resources for Teaching about Streams and the Water Cycle. Streams Resources. Rivers and Streams - Water and Sediment in Motion.