Water resource specialists Global Warming and the Padma Bridge in Bangladesh water resource specialists.

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Presentation transcript:

water resource specialists Global Warming and the Padma Bridge in Bangladesh water resource specialists

The Indian Subcontinrent

water resource specialists Ganga – Brahmaputra – Meghna Rivers

water resource specialists Bridge design flows 1.Flood discharge yr flood 2. Water level – 100 yr level 3.Scour depths (elevations) = 100 yr scour Global warming 1.Rainfall % by Water level rise ? 3.Sea level rise – 0.5 to 1.0 m 4.Cyclones 5.Delta subsidence Design Parameters

water resource specialists Uttar Pradesh, Bihar, West Bengal, Assam and Bangladesh Bangladesh floods due to rainfall in Assam. Ganga does not influence flood levels significantly.

water resource specialists Flood Affected Area

water resource specialists

Bridge Pier Scour Hydraulic Model

water resource specialists Bridge Pier Scour

water resource specialists Annual Rainfall Change by 2100 (IPCC)

water resource specialists Northeast Regional Project – Mean Annual Rainfall Range: 8000 mm/yr to 2000 mm/yr

water resource specialists Sea-Level Rise in the Twentieth Century

water resource specialists Vanishing Glaciers Biggest Threat to World Food Supply Crops likely hit hardest by flooding, drought, pollution and will cause skyrocketing prices by Lester R. Brown According to the World Bank, it would take only a three-foot rise in sea leel to cover half the rice fields in Bangladesh, a country of nearly 160 million people. Washington Post Leter R. Brown is president of the Earth Policy Intitute an the author of “Plan B4.0: Mobilizing to Save Civilization.” World News Updated 24/7 at Vancoversun.com/world

water resource specialists Projected Areas of Flooding as a Result of Sea-level Change in Bangladesh Two scenarios (low=1m and high=3 m) (modified after Broadus et al./ 1986 Broadus, J., Milliman, J., Edwards, S., Aubrey, D. and Gale, F., 1986, Rising sea level and damming of rivers: possible effects in Egypt and Bangladesh. In J.G. Titus (ed.), Effects of changes in stratospheric ozone and global climate. Washington, DC: United nations Environment Program/U.S. Environmental Protection Agency,

water resource specialists Bridge design flows 1.Flood discharge yr flood 2. Water level – 100 yr level 3.Scour depths (elevations) = 100 yr scour Global warming 1.Rainfall % by Water level rise ? 3.Sea level rise – 0.5 to 1.0 m 4.Cyclones 5.Delta subsidence Design Parameters

water resource specialists Global Warning, The Last Chance for Change