Brainstorm with students and list all different terms that are connected to a natural and man changed the shape of a river (torrent, meander, delta, dams, riprap banks, channelization).
Look at each of the terms and try to define its correct meaning.
Take the Worksheet “The Sections of Riverbeds Changed by Man” and have a discussion with students about characteristics of each type:
Unchanged rivers = natural rivers
Significantly changed rivers = significantly changed (accumulations, regulated with the application of artificial materials for stabilizing the banks, etc.).
Artificial channels = constructed by humans.
Look at the collected pictures and try to match them with one of the above types of water body.
Find photo or reference pictures out of history books, or make a drawing of an example of a water body before and after the different regulation constructions (each group or pupil can try to find one or more examples).
Make a drawing showing spring in the mountain and let pupils finish drawing splitting them into few groups with different tasks. Each group should make one of three different kinds of morphological categories of the water body (unchanged, significantly changed and artificial). They should create a story around their presentation:
What happened with their river?
What can be the effects of dam construction on the surrounding area? What will happen to the ecosystem upstream of the dam and downstream of the dam?
What will the upper sector of your intervention look like?
What will the lower section of your intervention look like?
Materials and Worksheets
pictures of different rivers collected from various sources