AbstractThe Grijalva River in Mexico Hindered by a LandslideTrack: Disaster Management and Emergency Response Author The 2007 rain season in the Grijalva river basin in Mexico, had extraordinary precipitation and runoff. The city of Villahermosa, Tabasco, in the lower basin was inundated by the river overflow. On November 4th a landslide buried the rural community of Juan de Grijalva, Chiapas, on the river banks and also produced a natural barrier obstructing the river. Villahermosa had a break in the flooding by the natural dam, but the water level was dangerously increasing at a rate of 2cm/hr. After 44 days of intense work with heavy machinery, a channel was opened to drain the natural dam. To dimension the magnitude and extents of the landslide, remote sensing data from before and after the event is presented. A previous perspective was assembled with high resolution imagery and 30m DEM, and for the post event, a 1m Lidar DEM, infrared aerial mosaic and high resolution satellite imagery. Alejandro Hinojosa CICESE PO Box 434843 San Diego, California 92143-4843 United States Phone: 011526461750500 E-mail: alhinc@cicese.mx Victor Rodriguez-Moreno INIFAP Campo Experimental Pabellón. INIFAP. Km 32.5 carretera Ags-Zac, Pabellón de Arteaga, Aguascalientes, Aguascalientes 20660 Mexico Phone: 011526461750500 E-mail: rmoreno@cicese.mx Octavio Meillon CICESE Carret Ens-Tij No. 3918 Esenada, Baja California 22860 Mexico Phone: 011526461750500 E-mail: omeillon@cicese.mx |