COASTAL VULNERABILITY DUE TO SEA-LEVEL RISE HAZARDS IN THE - - PowerPoint PPT Presentation

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Oct 05, 2022 263 likes •471 views

Band-Aid Project E S A E S A N A S A N A S A J A X A N A S A / D L R COASTAL VULNERABILITY DUE TO SEA-LEVEL RISE HAZARDS IN THE BANGLADESH DELTA: BAND-AID R. Rietbroek, B. Uebbing, C.K. Shum, V. Ballu, S. Calmant, J.

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Project Band-Aid, 26 June 2016, UNU

Band-Aid Project

COASTAL VULNERABILITY DUE TO SEA-LEVEL RISE HAZARDS IN THE BANGLADESH DELTA: BAND-AID

R. Rietbroek, B. Uebbing, C.K. Shum, V. Ballu, S. Calmant, J. Duan, J. Guo, F. Hossain, C. Jenkins,
Z. Haque Khan, J. Kim, M. Kuhn, J. Kusche, F. Papa, K-H Teng, J. Wan, B. Braun, A. Bernzen, R.

Ahmed, and M. Hossain

LIVELIHOOD RESILIENCE, RESEARCH, AND PRACTICE BONN, 26 JUNE, 2015

N A S A N A S A / D L R N A S A E S A J A X A E S A

Partner: Bonn University, Germany Ohio State Univ., US IRD, France

Inst. For Water Modelling, Dhaka, BD

University of Cologne, Germany Curtin University, Perth, AUS LEGOS, Toulouse, France

Univ. of Rajshai, Rajshahi, BD

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2 Project Band-Aid, 26 June 2016, UNU

Band-Aid Project

Ganges–Brahmaputra-Meghna Delta (Bay of Bengal, Bangladesh) is the largest Delta and one of the most densely population regions in the world BELMONT FORUM PROJECT: BANGLADESH COASTAL VULNERABILITY & SEA-LEVEL RISE HAZARDS, BAND-AID

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3 Project Band-Aid, 26 June 2016, UNU

Band-Aid Project

Ganges–Brahmaputra-Meghna Delta (Bay of Bengal, Bangladesh) is the largest Delta and one of the most densely population regions in the world

Objectives: (1) establish a satellite geodetic observational system to quantify

sea-level rise and land motion in the Delta, and to project relative sea-level rise to 2100 and beyond, at fine regional scales, and (2) to quantify the human interaction and social sciences that govern coastal vulnerability in Bangladesh

Bangladesh is prone to transboundary monsoonal flooding, storm surges, and

climate change induced sea-level rise. Land subsidence caused by tectonics, sediment load and ground water extraction have exacerbate the risks for Bangladesh’s coastal vulnerability

BELMONT FORUM PROJECT: BANGLADESH COASTAL VULNERABILITY & SEA-LEVEL RISE HAZARDS, BAND-AID

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4 Project Band-Aid, 26 June 2016, UNU

Tide gauge trend ~1.6-1.8 mm/year

20th century global mean sea level rise

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5 Project Band-Aid, 26 June 2016, UNU

Sea level rise is not uniform

Mean: 3mm/a

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6 Project Band-Aid, 26 June 2016, UNU

Sea level rise is not uniform

Mean: 3mm/a BoB: 6 mm/a

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7 Project Band-Aid, 26 June 2016, UNU

What are the issues adressed in Band-Aid Bangladesh Assessment of SLR (~6 mm/y) and physical/social implications

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8 Project Band-Aid, 26 June 2016, UNU

What are the issues adressed in Band-Aid

Floodings, surges and cyclones Salinization Tides and coastal morphology Sea level rise Himalaya and upstream Monsoonal changes Land use (agriculture, shrimp farming, reservoir construction) Tidal river management Coastal embankment strategies Vertical land motion Sedimentation

Bangladesh Assessment of SLR (~6 mm/y) and physical/social implications

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9 Project Band-Aid, 26 June 2016, UNU

Satellite-geodetic observational system

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10 Project Band-Aid, 26 June 2016, UNU

Climate variability and ocean heat uptake

mm/a

low-lying (<10m) Currently, sea level rise is accelerating along many coast of South Asia. A part of this is natural variability; i.e. it will not continue. But what part?

1993-2014 2003-2014

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11 Project Band-Aid, 26 June 2016, UNU

Sea level Projections

Polders in green. Nonlinear (accelerated) sea-level projection based on climate scenarios [Parris et al. 2012; Vermeer & Rahmstorf, 2009] & reconstructed sea-level trend, 1950– 2012 [Meyssignac et al., 2012] & GPS subsidence [Steckler et al., 2012; courtesy]

2050

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12 Project Band-Aid, 26 June 2016, UNU

Sea level Projections

Polders in green. Nonlinear (accelerated) sea-level projection based on climate scenarios [Parris et al. 2012; Vermeer & Rahmstorf, 2009] & reconstructed sea-level trend, 1950– 2012 [Meyssignac et al., 2012] & GPS subsidence [Steckler et al., 2012; courtesy]

2100 2050

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13 Project Band-Aid, 26 June 2016, UNU

Sea level Projections 2050

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14 Project Band-Aid, 26 June 2016, UNU

Relative sea level and its measurement 2050 Land subsidence is as important as sea level rise. Long-term monitoring (vertical control, tide gauge, geodetic network) very important!

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15 Project Band-Aid, 26 June 2016, UNU

Relative sea level and its measurement 2050 Bangladesh is a polder country, strong tides and morphology changes. Long-term terrestrial monitoring along the coast is difficult and expensive. Coastal embankment improvement project.

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16 Project Band-Aid, 26 June 2016, UNU

Relative sea level and its measurement 2050 Bangladesh is a polder country, strong tides and morphology changes. Long-term terrestrial monitoring along the coast is difficult and expensive. Coastal embankment improvement project. Band-Aid: Integrate satellite data into terrestrial monitoring systems!

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17 Project Band-Aid, 26 June 2016, UNU

Regional sea level rise 1st project meeting, Dhaka 2014 Tide gauge station installed by Band-Aid

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18 Project Band-Aid, 26 June 2016, UNU

Connecting satellite and tide gauge measurements

S. Calmant (IRD)

Measuring sea level with a GPS float for calibrating satellite measurements

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19 Project Band-Aid, 26 June 2016, UNU

Band-Aid Project – Sustainable Research

Close cooperation with local partners (IWM,
thers
Capacity building (e.g. training workshop

8/2015)

Seek to engage in long-term collaboration