Time Series Analysis of Thailand Flooding 2011 V2
Thu, 17 Nov 2011 13:06:46 GMT| Product ID: 1615 - English Published: 17 Nov, 2011 GLIDE: FL-2011-000135-THA FootPrint (Lat x Long, WSG84 Geographic, decimal degrees) TopLeft: 14.22 x 100.46 BottomRight: 13.963 x 100.658 |  |
| UNOSAT_THA_FL20111114-Overview-A2_v2.pdf (12.4MB) | |
| This map presents a time series analysis of the dramatic southward progression of flood waters from the central provinces of Thailand towards the capital city of Bangkok, based on satellite data recorded from mid-August to 14 November 2011. Flood waters have been symbolized by color to represent the relative expansion of water from month to month. In the map, by mid-August flood waters were restricted to Northern provinces, symbolized in yellow. By mid-September, the flood waters rapidly expanded southward, symbolized in orange; by mid-October, flood waters had expanded dramatically in total area, effectively surrounding downtown Bangkok, while severely affecting most outlining populated areas; As of 14 November 2011, flood waters have further risen into the central portions of the city, while receding very little in the north of the country, indicating that it will likely take several more weeks before an appreciable decline in standing flood waters is observed. A more detailed review of very high resolution satellite imagery over Bangkok indicated that virtually all agricultural fields, significant stretches of major roads and highways as well as large residential areas remain inundated, leaving tens of thousands of residential homes and commercial businesses either partially or totally submerged. It is likely that flood waters have been systematically underestimated along highly vegetated areas along main river banks, and within built-up areas within Bangkok because of the special characteristics of the satellite data used. This analysis has not yet been validated in the field. Please send ground feedback to UNITAR /UNOSAT. | |
| Satellite Data(1) : Envisat ASAR WS- HH
Imagery Dates: 13,24 October 2011 Resolution : 150 m Source: European Space Agency Provided by: GeoPictures/ KSAT Satellite Data(2) : MODIS Aqua & Terra Imagery Dates: 14 NOV, 23-5 SEPT,13&22 AUG2011 Resolution : 250 m Source: NASA Provided by: NASA Rapid Response Settlement Data: EU-JRC / NGA Road Data: ESRI, OSM Other Data: OCHA, USGS Analysis : UNITAR / UNOSAT Production: UNITAR / UNOSAT Analysis conducted with ArcGIS v10 This work by UNITAR/UNOSAT is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. | |
