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Arch (Concrete with arched shape-less concrete used) Embankment


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Dams: Pros and Cons

Dam Types

Arch (Concrete with arched shape-less concrete used)

Embankment (earthen, rocks)

Buttress (concrete)
Advantages of Dams:

Recreation (lake)

Flood control downstream

Irrigation potential from water storage

Hydroelectric Power generation capability

Evening out of flow during the year


Disadvantages of Dams:

Change in ecosystems

Flooding upstream (buried by water)

Loss of sediment below stream (delta starvation)

Silting of lake

Fish trapped below dam

Potential dam failure

Evening out of flow during the year (prevents sediment renewal on floodplain)

Formation of Reservoirs not on lakes

(examples: Pyramid Lake, CA, Black Rock, WA-proposed):



Pumping of water into a basin that has no natural river system (requires some energy to pump water into lake area)

Storage of water for irrigation/drinking/power generation


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