National Mission for Clean Ganga (NMCG) approved 13 projects pertaining to geo-mapping in Uttarakhand, Uttar Pradesh and NCT of Delhi, sewerage management in Uttarakhand, Uttar Pradesh, Bihar and West Bengal, riverfront development works in Uttarakhand, wetland conservation, Arth Ganga and refurbishment of gates of Belia Circular Canal in Kolkata, said a press release by the Ministry of Jal Shakti on Thursday.