Geohazard detection and analysis along an electricity transmission line in Tibet, China

摘要: To facilitate scientific decision-making and geohazard prevention mitigation during the construction operation of an electricity transmission line projects in Tibet, China, this paper used remote sensing (RS) geographic information system (GIS) technologies to semi-automatically extract potential geohazards along which pose threats towers from perspective drainage basin, especially for high-speed long run-out geohazards, such as glacial landslides debris flows (triggered by lake burst rainstorm). Spatial analysis tools are model relationships among different towers, according development movement laws each kind geological disasters position towers. Using proposed extraction model, 37 posing direct 93 were automatically filtered. These corroborated field investigations should be monitored following stage. The results show that based on spatial can quickly filter locate corresponding hazards with a distance effectively reduce workload investigation.