Geographers can tell you that the one thing that most rivers and their adjacent flood plains in the world have in common is that they have rich histories associated with human settlement and development. This especially true in arid regions which are very dependent upon water. Two excellent examples are the Nile and the Tigris-Euphrates rivers which show use the relationship between rivers and concentrations of people. However, the Colorado River is not such a …showed first 75 words of 3651 total…

…showed last 75 words of 3651 total…cries from the conservationists. In 1991 the Arizona stretch of the Colorado River was named the most endangered river of 1991 by American Rivers, a conservation group. Many of the fish and wildlife have disappeared. Special areas have been designated as wildlife protection areas. The Endangered Species Act protects the river and can be enacted independently of the Clean Water Act. Federal Fish and Game, state resources and conservation groups have all worked to make the public