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Student News Net editor: Great questions Wyoming students! Since a number of the questions dealt with levees, the source for expert information is the U.S. Army Corps of Engineers. They have good information about levees on their website at:

Regarding the question about whether Iowa has a lot of rain each year, the link below gives annual precipitation by state so you can compare Wyoming and Iowa to other states. Here is the link
Wed Sep 28 15:16:07 2016
Student News Net editor: The question about how scientists can predict when a river will crest was a great one. The link below is from the University of Iowa College of Engineering that reprinted an article from the Cedar Rapids Gazette. It has a great explanation of the complicated factors that are considered when predicting water flow and height during floods. Here is the link:
Wed Sep 28 15:22:22 2016