The Central Water Commission is regularly documenting water resources and related data in its publications entitled "Water and Related Statistics". The present handbook namely, "Hand Book on Water & Related Information" gives details primarily on the progress of major and medium projects.
Links:
[1] http://admin.indiaenvironmentportal.org.in/data-statistics/handbook-water-and-related-information-2016
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/central-water-commission-cwc
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water-standards
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/statistics
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/irrigation
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rainfall