Levees prevent rivers from flooding their banks as often
provides a source of irragation
Building dams is a threat to fish because it takes away from their habitat and breeding grounds. Dams may also hinder their ability to migrate.
Architects.
Lire Ersado has written: 'Small-scale irrigation dams, agricultural production, and health' -- subject(s): Agriculture, Diseases, Economic aspects of Agriculture, Irrigation
It comes at a trade off. The production of electricity from hydroelectric sources reduces emissions, but typically requires building dams, which can have severe environmental impact.
building houses or dams
beaver
dams
The result of growth in agricultural production in the late 1920 were things such as- construction of dikes and dams,use of fertilizers in farming, small farms to large farms, crop rotation, invention of the seed drill, farm journal-which was as newspaper, but for farmers giving them ideas on how to farm, and newspapers. These are some of the basic and important results of the agricultural production. And this lead to the increase of population as well as migration.Then that caused a new revolution the energy revolution or new technology.
By selecting cows that have the best milk production in the herd and breeding them to bulls whose dams also had superior milk production, resulting in heifers with higher milk production than their dams.
Building dams
they route it differently
Dams disrupt a river's ecosystem.