Analysis of the 2003 Varunawat Landslide, Uttarkashi, India using Earth Observation data
Autor: | K. Vinod Kumar, R. S. Chatterjee, Asis Bhattacharya, Tapas R. Martha, R. C. Lakhera |
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Rok vydání: | 2007 |
Předmět: |
Hydrology
Earth observation geography geography.geographical_feature_category Lineament Landslide classification General Engineering High resolution Landslide Debris Rockfall Earth and Planetary Sciences (miscellaneous) Natural degradation General Earth and Planetary Sciences Environmental Chemistry Physical geography Geology General Environmental Science Water Science and Technology |
Zdroj: | Environmental Geology. 55:789-799 |
ISSN: | 1432-0495 0943-0105 |
Popis: | Mass movements such as landslides in mountainous terrains are natural degradation processes and one of the most important landscape-building factors. Varunawat Parbat overlooking Uttarkashi town witnessed a series of landslides on 23 September 2003 and the debris slides and rock falls continued for 2 weeks. This landslide complex was triggered due to the incessant rainfall prior to the event, and its occurrence led to the blockage of the pilgrim route to Gangotri (source of the Ganges river) and evacuation of thousands of people to safer places. Though there was no loss of lives due to timely evacuation, heavy losses to the property were reported. High-resolution stereoscopic earth observation data were acquired after the incidence to study the landslide in detail with emphasis on the cause of the landslide and mode of failure. Areas along the road and below the Varunawat foothill region are mapped for landslide risk. It was found that the foothill region of the Varunawat Parbat was highly disturbed by man-made activities and houses are dangerously located below steep slopes. The potential zones for landslides along with the existing active and old landslides are mapped. These areas are critical and their treatment with priority is required in order to minimise further landslide occurrences. |
Databáze: | OpenAIRE |
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