Flood are top-ranking natural disaster in terms of annual cost in insured and uninsured causes.
Many studies have been taken in scientific literature since 1970 s, about mapping and monitoring floods using data .
Based on a dynamic model and a sample of 442 municipalities from 2009 to 2014, it is found that damages to infrastructure have negative impact on municipalities current income balance and their annual results . This indicates a weakening of municipalities' financial situation
This project discusses about the existed development on flood disaster and new methadology
that leverage earth observation and critical infrastructure data sets to estimate damages to infrastructure caused by flooding . It also critically discusses planning policies, requirement, challenges and perspective action to prevent building and infrastructure during flood disaster using satellite remote sensing products.
Boey says, " combined with other flood information sources ,satellite data can be definitely
be effective".
Flooding usually causes due to heavy rainfall ,melting ice or snow , increase in volume of water level in rivers which all depends on the weather and climate . This results in a great negative social impacts.
To address these challenges , that exist in making earth observation data more readily usable
and actionable in assisting flood disaster preparedness and response , the scientific community should seek collaboration with end users. The idea is that the focus should be on flood resilience rather than defense scheme.
A useful technique is by creating hydrodynamic simulations for our various river basins.
Originally these were physical scale models but numerical models running in computers
are increasingly important.
The idea behind the project was to use satellite data as an additional means of mapping flood extend in zones close to river as well as creating more accurate flood risk maps and carrying
out post - flood damage assessment
For imaging (mapping) the rivers corresponding to historical flood ERS and Envist Radar Image
were acquired .High resolution IKNOS and landsat EIM optical imagery became the basis of risk
maps with risk mapping you are combing three different variables,firstly ,the spatial extend-
which areas are flooded .Then comes the type of area will be affected;a flooded meadow won't
cause a much damage as an inundated urban area. The final variable is the return period-will
the flood recur once a year ,every ten years or every 100 years .The idea is that making ourselves familiarised with the area of earth observation and so making it much more likely
we will make operational use of future .
In case of flood monitoring and response several organizations including space agencies like
NASA (National Aeronautics And Space Administration) and ESA(European Space Agency)
as well as many universities and research institutes used to provided many services like imagery and computer vision products which was useful in finding after affected flooded
areas in the world and to understand what limits the usefulness of monitoring capabilities.
There are also international initiatives and organisations comprising many different players,
that provided relevant services and geospatial data. For flood mapping ,SAR(Synthetic Aperture Radar) has the advantage to penetrate cloud cover and remains largely unaffected
by adverse weather condition in flood mapping and accelerated progress in flood forecasting.
video on Flooding:
presentation on flooding:
https://drive.google.com/file/d/1_ztdE9lfg4mRdPEFlPQnz6dcIBxT7X7z/view?usp=sharing
referred links:
http://floodobservatory.colorado.edu/DischargeAccess.html
http://oas.gsfc.nasa.gov/floodmap
https://earthdata.nasa.gov/about/science-system-description/eosdis-components/lance
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