The archaeological department has found five thousand-year-old remains of one of the biggest man-made reservoir near Dholavira village in the border district of Kutch
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/5000-yr-old-reservoir-unearthed
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/pioneer-new-delhi