1. It is very expensive to build.
2. Natural habitats are destroyed for the building of the plants.
3.Large sources of water is needed.
4.The quality and the quanity of the water may be lowered.
there are over 20 hydro-electric dams in Iowa
That would be water. Water from rivers being very popular with the hydroelectric dams. Storing its potential energy behind the dam.
Some concerns are the strengtheners and what backs up the dam if it breaks.
Well, there's been some talk that the pressures generated as it goes through the turbines would be detrimental to plankton and stuff, but I don't think anything's been proven. The big thing about hydroelectric dams is that they are big, and they change the landscape quite a lot.
Hydroelectric dams do not directly produce carbon dioxide. However, construction of dams can result in some carbon dioxide emissions due to activities like land clearing, transportation, and concrete production. Operations of the dams can also have indirect emissions through processes like vegetation decay in flooded areas.
Sometimes dams slow the water down, and makes the water build up, causing floods.
Roads, railways, libraries, hydroelectric dams, milk processing factories, sheep farms.
A dam is a structure which controls the amount of water flowing. Silt build up is a type of problem many dams face. Silt is a type of sediment which builds up around the dam, as all water contains some form of silt or debris. Some problems caused by silt build up are erosion of dam parts, abrasion to dam materials, and damage to the dam turbines.
Some of the major dams on the Ganga River include the Bhagirathi Dam, the Tehri Dam, the Ramganga Dam, and the Bansagar Dam. These dams are important for various purposes such as hydroelectric power generation, irrigation, and flood control.
Wind, solar, water (as in hydroelectric dams), and Biofuel (corn-based ethanol) are major alternatives to fossil fuels.
Hydroelectric power is already one of the current methods and has been for well over 100 years. No it cannot completely replace other means of generating electricity. For one thing most western nations have already maxed out their usage of hydroelectric power and some have actually had to tear down some older dams due to environmental damage caused by the dam. Rivers that can be economically dammed to generate power are a very limited resource.
there are two major dams on the Ganga. One at Haridwar diverts much of the Himalayan snowmelt into the Upper Ganges Canal. The other dam is a serious hydroelectric affair at Farakka. The dams were named according to the cities.