lecture 18: the jamuna-brahmaputraclasses.geology.illinois.edu/17sprgclass/geogese_222/big...
TRANSCRIPT
• Geomorphology and Hydrology •Flooding, erosion and bank protection •Water quality •Ecology •Water management and policy
Length: 2900km
Peak Discharge: 72,748m3s-1
Mean Annual Water
Discharge: 33,600m3s-1
Drainage Basin Area: 0.63 *
106 km2
Current Average annual
suspended sediment
discharge: 600* 106 t
• Whole infrastructure collapses during severe floods
• In 1988, floods washed away:
- 2700 schools
- 3000 km of roads
- 630 km of railway
- 45 bridges
• Loss to economy was $2billion
•24,000 km network of rivers
•On average, 20% of land floods annually
•40% in 1987, 62% in 1988
•1988 flood killed 2379 people, damaged or destroyed 7 million homes
see links on course website
Best et al., (2007), Chapter 19 in
Large Rivers
Singh, S.K., (2007), Chapter 18 in
Large Rivers