U.S. Geological Survey Open-File Report 99-518
By B.A. Morgan, G. Iovine, P.G. Chirico and G.F. Wieczorek
In August 19/20, 1969, 71 centimeters of rain fell in the Nelson County area of Virginia. The intense debris and floods that followed extensively damaged roads, bridges, communication systems, houses, farms, and livestock, as well as taking 150 lives. This inventory is of the debris flows and floods which area digitally based, and are derived from aerial photography collected on August 25, 1969 and April 27, 1971. This study was undertaken to provide a basis for detailed analysis of both terrain and failure sites using GIS techniques not available to earlier studies.
U.S. Geological Survey Open-File Report 1999-336A
By Russell H. Campbell1 and Pete Chirico2
Documentation for and preliminary evaluation of the digital terrain data and GIS procedures applied to make the potential debris-flow hazards map of U.S. Geological Survey Miscellaneous Investigations Series Map I-2623B (Morgan and others, in press)
U.S. Geological Survey Open-File Report 97-438
By Benjamin A. Morgan, Gerald F. Wieczorek and Russell H. Cambell
Digital Compilation By Russell H. Cambell and Peter G. Chirico
A severe storm on June 27, 1995 triggered hundreds of rock, debris and soil slides from the steep hillsides Madison County, Virginia. Most of these transformed into debris flows that inundated areas downslope causing damage to structures, roads, utilities, livestock and crops. This study contains an analysis of areas susceptible to debris flows including an examination of source areas, channels and areas of deposition. This project has been prepared in cooperation with the Federal Emergency Management Agency.
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