Discussion: ʻChanging river courses in the western part of the Ganga-Brahmaputra delta' by Kalyan Rudra (2014), Geomorphology, 227, 87-100

- Inconsistencies of Rudra's (2014) work are brought out.
- These mainly involve misstatement of facts and presentation of untenable results.
- The detected issues are corrected with up-to-date information wherever applicable.

Rudra (2014, Geomorphology, 227, 87-100) presented a review of geomorphic changes of the Indian part of the Ganga-Brahmaputra delta (GBD) during the last ~ 240 years, emphasising deterioration of distributary channels, effects of discharge augmentation from the Farakka barrage project into the Bhagirathi-Hugli river and the patterns of coastal erosion. The work contained many inconsistencies, improper understanding, and misrepresentation of facts. The principal of these involved (1) usage of nomenclature like GBD, Bengal basin, and their delineation; (2) discussions made on evolution and current status of the deltaic distributaries; and (3) generation and presentation of data on discharge, tides, and sea level. Besides this, most figures of the work contained positional inaccuracies and/or errors in survey years. We systematically addressed all these issues in the present discussion and offered corrected and up-to-date information wherever applicable.