<div><b><span style="font-size: 1rem;">A seminar on climate change and disaster management was held today at Bangladesh Open University (BOU) on its campus in Gazipur.</span><br></b></div><div><br></div><div>In the seminar, Dr. Jennifer Pickering of Memphis University, USA presented the keynote paper on "Rethinking Geomorphic Drivers in Bengal: Impacts of Megafloods on Fluvial-Deltaic System Dynamics", said a press release.</div><div><br></div><div>BOU vice-chancellor Professor Dr Syed Humayun Akhter and Professor Dr. Mike Blum of University of Kansas, USA, BOU Pro-VC (Administration) Professor Dr Nasim Banu, Pro-VC (Academic) Professor Dr Mahbuba Nasreen, Treasurer Professor Mostafa Azad Kamal and Open School dean Professor Sabina Yeasmin addressed the seminar, among others.</div><div><br></div><div>While addressing on Megafloods on Fluvial-Deltaic System, Dr. Jennifer said, the paleo valley floor is defined by a gravel unit containing boulder-sized casts up to 30 cm in diameter, deposited after ca. 30 ka but before ca. 9 ka.</div><div><br></div><div>The current research indicates that glacial-lake outburst floods sourced from the Tibetan reaches of the Brahmaputra were routed through the low stand valley, producing mega flood-scale discharge capable of transporting gravel and cannibalizing the valley margins, she added.</div><div><br></div><div>Dr Jennifer said the timing of these glacial-lake outburst flood-driven discharge events was coincident with valley development and explains the anomalously large width of the valley and basal gravel surface, reports BSS</div><div><br></div><div>Despite the underfit scale of Brahmaputra discharge following the last glacial period, a strengthening monsoon and high sediment discharge in the early Holocene subsequently contributed to the efficient infilling of the massive paleo valley by the mid-Holocene, she added.</div><div><br></div><div>bnbd24/fas</div>