dams
They can assist in controlling flooding on many rivers. Dams can by used to create hydro-electric power. The lakes created are often great recreation areas.
Some positive things about dams include (but are not limited to) the following: * Provide protection against flooding * Provide a mechanism to create electricity * Provide a feeding-point for man-made bodies of water Some negative things about dams include (but are not limited to) the following: * Are expensive to build * Are good targets for terrorist activity * When compromised must be completely rebuilt
positive-it does not cause pollution.negative- it is expensive to build and hard (takes years)!
Mechanical energy production can have both positive and negative environmental impacts. Positive impacts include generating clean energy from renewable sources like wind turbines or hydroelectric dams. Negative impacts can include habitat disruption, noise pollution, and visual disturbance from infrastructure like dams or wind farms.
They are a useful energy sourceThey cause no pollution when producing energyThey are expensive to build
there are about 50 dams
how many dams in the river rhine11 dams whith hydropower stations .
The various types of dams are:Gravity DamsEarth DamsRockfill DamsArch DamsButtress DamsSteel DamsTimber DamsRubber DamsOn the basis of functions of dam, it can be classified as:StorageDiversionDetentionDebrisCofferReference: http://blog.thecivilengg.com/types-of-dams/
They pose hazards both above and below dams
18 dams are in pakisthan
19 dams
No, but it does have weirs.