Overview of Tangjiashan Quake Lake, Beichuan, China from 3 - 8 June 2008

Mon, 9 Jun 2008 20:27:53 GMT
Product ID: 1234 - English
Published: 9 Jun, 2008
GLIDE: EQ-2008-000062-CHN
FootPrint (Lat x Long, WSG84 Geographic, decimal degrees)
TopLeft: 31.921 x 104.225
BottomRight: 31.797 x 104.519

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This map presents a satellite-based water and damage assessment for the affected towns and villages along the flooded Jianjiang River valley, resulting from the earthquake-created lake and landslides. This assessment has been made with FORMOSAT-2 satellite imagery acquired from 3 to 8 June 2008 at a spatial resolution of 2m. Pre-disaster imagery recorded on 14 May 2006 was also used. This is an initial damage assessment & has not yet been validated in the field. Map scale for A3: 1:60,000; Projection : UTM, Zone 48 North; Datum :WGS 1984.
- Water levels are visibly rising from 5 to 8 June;
- Some water movement through new drainage channel;
- Two villages are submerged under the lake;
-8 pedestrian bridges and 3 main bridges are destroyed;
- Approximately 17km of road along the Jianjiang River is
submerged under water or destroyed by landslides;
- A significant threat exists from a lake-borne tsunami, generated by new landslides into Tangjiashan lake.
Satellite Data: Formosat-2
Resolution : 2.0m
Date Series : 3 - 8 June 08 & 14 May 06
Image Copyright : NSPO (2008)
Image Analysis : UNOSAT
Elevation Data : SRTM-NASA
GIS Data : UNOSAT
Map Production : UNOSAT (9 June 2008)