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... Dams can be constructed of earth, concrete, wood or rock. Dams can provide many benefits such as water supply, flood control, hydroelectric power, fishing and recreation. However, dams can also be a great threat to the safety and well being of downstream property and people if they are not properly constructed or maintained.
Dams’ primary reason of being built is to provide water for irrigation and hydropower. ... (2)
There are many disadvantages to building dams. Generally dams:
Ø deplete natural settings
Ø flood the spawning grounds of fish
Ø inhibit the seasonal migration of fish
Ø threaten and endanger some species of fish and mussels
Ø flood archaeological sites or ancestral burial grounds
Ø can foster diseases if unkempt (6)
Dams cause the deaths of many young fishes, especially salmon migrating downstream after hatching. ... Dams can easily reduce the size of the salmon community. ... Dams can also affect our beaches, which many enjoy; by trapping the sediment we are starving the beaches of a sediment source. ... (5)
Another example of how dams affect the environment around it is the in the Snake River.
Approximate Word count = 811
Approximate Pages = 3.2
(250 words per page double spaced)
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