UAV LiDAR for Surveying Steep Slopes
Steep slopes have always posed particular problems for surveying. Typically inaccessible or with limited access, steep slopes can now be mapped with UAV LiDAR, eliminating the need for expensive airborne surveys or hazardous surveying from the ground.
|Application||Advantages of UAV LiDAR for steep slopes|
|Dam and water conveyance infrastructure surveying to monitor the condition of the assets, predict potential deterioration, identify issues or structure failure, and plan preventive maintenance.|
As well as presenting difficult, steep slopes to survey, dam sites typically also contain other hazards such as transmission lines, which means it is too dangerous to undertake helicopter surveys. UAV LiDAR removes this barrier offering quick, repeatable surveys for monitoring and maintenance.
|Landslide||UAV LiDAR is an amazing landslide mapping tool. One of the great strengths is that it can give the form of the land surface even when it is covered in dense vegetation. LIDAR is mainly used for landslide investigation to create accurate and precise high-resolution digital terrain models, and this can be repeated at regular intervals to give temporal information. The main applications range from mapping to monitoring, including deformation analysis, measuring the speed of slope displacements and erosion monitoring.|
Monitoring subsidence at regular intervals is another application to establish where and how much the land is subsiding and slipping. Extracting a bare earth model to compare and interpret movement over time, allows for informed decisions to be made to enable remedial ground engineering work to be undertaken.
|Water pipelines||Every year, wastewater managers must make decisions about which portions of their collection system should be maintained, rehabilitated or replaced. Decisions are made more complex with aging wastewater infrastructure. LiDAR can be used to map and inspect pipelines to assess soil erosion rates, deformation, and size measurements. LIDAR can also provide additional feature information when no accurate as-built data is available. such as bends in the pipe, which can then be accurately modeled and measured. When it comes time to replace a given section of pipe, the precise bend angles and bend radius measurements from the LIDAR can be factored into the rehab design.|
Water pipelines are often located in naturally hazardous environments such as steep canyons, where the sides are so steep and so close together that it is impossible to fly a helicopter through it. UAV LiDAR provides the perfect solution.
|Archeological sites||Archeologists typically want to achieve very detailed and high resolution models of sites of historical interest, usually small sites, located in remote and inaccessible locations. No doubt located in such positions to provide as much natural fortification and defense from marauding tribes as possible.|
This very location of the site makes it difficult to access and undertake a conventional survey. To compound this, helicopter surveys are prohibitively expensive and normally beyond the budget of most archeological teams. UAV LiDAR provides the perfect solution.