monsoon floods early warning: monitoring rainfall and river levels upstream lcg der mtg. 16 july...
TRANSCRIPT
Monsoon Floods Early Warning: Monitoring Rainfall and River Levels
Upstream
LCG DER Mtg.16 July 2008
UN WFP/ Disaster Risk Reduction
Overview
Why upstream monitoring important for Monsoon Monitoring, Early Warning, and Preparedness
Some easily accessible sources of rainfall and river levels upstream
Monitoring for awareness, and potential future analysis
Why upstream monitoring is important ?
Why upstream monitoring is important ?
In an average year, 844,000 million cubic metre of water flows into the country during the humid period (May to October) through the three main rivers the ganges, the Brahmaputra-Jamuna and the meghna. This volume is 95% of the total annual inflow. By comparison only about 187,000 million cu m of streamflow is generated by rainfall inside the country during the same period.
95% of water from in-flow; 5% from rainfall in Bangladesh
Source: Banglapedia
Where to find data on river levels upstream? Indian Govmt. : Central Water Commission
(CWC)
Indian CWC; Sample OutputsSummary Report: Sites Above Warning
Level
Indian CWC; Sample Outputs
Individual Station Level Data: Assam Guwahati
Individual Station Level Data: Assam Dibrugarh
Upstream River Flow Data: Dartmouth Flood Observatory
http://www.dartmouth.edu/~floods/index.html
Upstream River Flow Data: Dartmouth Flood Observatory: River Watch Data
Rainfall Data Upstream: Indian Met Dept.
India: IMD
NASA TRMM Rainfall Estimates: Satellite Based
NASA TRMM Rainfall Estimates: Satellite Based
Closing Thoughts Monsoon Flood Early Warning and
Preparedness can be significantly improved via greater utilization of Upstream Data
Data availability is much better than most of us realise
Creative approaches (i.e. GIS etc …) should be used to better understand upstream-downstream dynamics; … i.e. significant events upstream, and timing… impacts downstream