Tata AIG General Insurance Company - Insurer Innovation Award 2024
Rivers forms and processes
1. Rivers: Forms and Processes Dr. Chris Parker Fluvial Geomorphologist / Senior Lecturer in Physical Geography Department of Geography and Environmental Management University of the West of England
5. Why it is important to understand how and why rivers move: Flood Risk
6. Why it is important to understand how and why rivers move: Flood Risk
7. Why it is important to understand how and why rivers move: Flood Risk Lane et al, 2007
8. Why it is important to understand how and why rivers move: Flood Risk +12.2% 1 in 0.5 year flood: 2002 climate 1 in 0.5 year flood: 2050 climate Lane et al, 2007
9. Why it is important to understand how and why rivers move: Flood Risk Lane et al, 2007
10. Why it is important to understand how and why rivers move: Flood Risk +5.7% 1 in 0.5 year flood: 2002 channel 1 in 0.5 year flood: 2004 channel Lane et al, 2007
11. Why it is important to understand how and why rivers move: Flood Risk
12. Why it is important to understand how and why rivers move: Flood Risk
13. Why it is important to understand how and why rivers move: Navigation
14. Why it is important to understand how and why rivers move: Damage to infrastructure
15. Why it is important to understand how and why rivers move: Damage to ecology
16. Why it is important to understand how and why rivers move: Damage to ecology
28. How will rivers move in the future? Cellular Catchment Model
29. How will rivers move in the future? Cellular Catchment Model (CAESAR) Coulthard et al
30. How will rivers move in the future? Average modelled sediment percent increase from baseline for the River Eden catchment, Cumbria Average rainfall percent increase from baseline for the River Eden catchment, Cumbria Coulthard et al
31. How will rivers move in the future? Modelled morphological change in the River Eden, Carlisle resulting from 90% increase in sediment yield Predicted increase in flood inundation resulting from predicted morphological change Coulthard et al
Editor's Notes
Satellite photo of the Songhua River, northeast China - includes Oxbow lakes .
The catchment and reach under study: the Upper Wharfe, Yorkshire Dales National Park, North Yorkshire. Sedimentsensors were installed in the Oughtershaw and Greenfield subcatchments, and at Beckermonds, Deepdale, Hubberholme, Buckden and Starbotton.
Predictions of areas inundated in the 1 in 0·5 with 2002 geometry and flows and with 2002 geometry and 2050s flows
Predictions of are as inundated in the 1 in 0·5 with 2002 geometry and flows and with 2004 geometry and 2002 flows.For the 1-in-0·5-year event, the increase in inundated area was almost one-half of the increase in inundated area estimated as resulting from simulated climate change to the 2050s.The indirect impacts of the climate change signal upon sediment delivery will act so as to reinforce the importance of short-term aggradation upon the magnitude and frequency of floodplain inundation, and that short-term variability in aggradation rates may be superimposed on top of a longer-term, aggradational trend. This emphasizes that the changing flood risk identified here will be strongly impacted upon by climate change, not only because of the direct impacts of climate upon the magnitude and frequency of high flow events, but also because of the indirect effects of changing climate upon coarse sediment delivery which in turn will impact upon coarse sediment delivery and hence aggradation rates.
Hawkcombe Stream, Porlock – 1960 flood
2 million properties in floodplains along rivers, estuaries and coasts in the UK are potentially at risk of river or coastal flooding. In England and Wales alone, over 4 million people and properties valued at over £200 billion are at risk. Flooding, and managing it, cost the UK around £2.2 billion each year: we currently spend around £800 million per annum on flood and coastal defences; and, even with the present flood defences, we experience an average of £1,400 million of damageForesight Future Flooding(Office of Science and Technology – April 2004)
