Dams are being built in different sizes depending on the requirements and the height permissible at the particular site. The higher a dam, the larger the concerns for undesirable impacts that have to be mitigated and the assurance that has to be given to everyone that the dam is not a time bomb, the unfortunate sentiment that many tend to possess. Dams have multi-directional benefits that are much larger than the visible damage that it creates.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/building-dam-meeting-concerns
[2] http://admin.indiaenvironmentportal.org.in/category/author/j-n-srivastava
[3] http://admin.indiaenvironmentportal.org.in/category/journal/water-energy-international
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dams
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geology
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/displacement
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/reservoirs
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/riverine-ecology
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sediment-transport
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dam-safety
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/earthquakes
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/storms
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming