In a sharp rejoinder over the proposed Kalpasar reservoir project in the Gulf of Khambhat, with former Government of India Secretary Babubhai Navalawala has dismissed the alternatives floated by veteran sociologist Prof. Vidyut Joshi as mere “supplements” rather than substitutes for the mega project. In the rejoinder to Prof. Joshi’s recent column Samudra Manthan in Gujarati daily Sandesh (see news item here ), Navalawala has argued that the scientific options suggested by the sociologist cannot replace Kalpasar.