Airborne Laser Scanning is the most efficient surveying method that enables the collection of 3D data of regions that were hit by natural disasters e.g. storms, earthquakes, floods, wildfires and thus, to provide a basis for watershed analysis and flood risk assessment shortly after the weather incident.
LiDAR derived point clouds can be incorporated into relief, rescue and flood simulation software to provide advanced topographical information for risk assessment. In AeroPhoto Co Ltd, we employ modern methods and software for faster analyses and deliverables compared to traditional methods.
In particular we are capable of providing our clients with disaster management services, which require accurate geospatial data assessment of each occurrence in order to produce reliable hazard maps and flood prediction models, enhance risk prevention systems and establish damage maps for insurance and government bodies. By processing the Digital Elevation Models (DEMs), we conduct watershed analysis, examining elevation variations, slopes and aspect. This analysis further involves mapping the flow direction and accumulation, delineating watershed boundaries and deriving the stream network of an area, which can also be outputted in vector format.
Human artifacts, building blocks, constructed river banks or roads have a great effect on water flow path, dynamics and flood propagation leading to frequent urban flooding and thus, our efforts to improve the effectiveness of proposed models.
Additionally change detection methods are required, for monitoring shifting and changes of soil due to human interaction, erosion, movements of dunes, or landslides, for identifying changes caused by volcanic pressure and for estimating the volumes of sediment moved by floods (e.g. sediment transport). By analyzing terrain characteristics and flow patterns, sediment transport models can predict erosion hotspots, sediment deposition areas, and sediment loads in streams and rivers.
