Detecting land subsidence is an important part of land management. When an area starts to subside, it can cause a lot of damage to infrastructure and property. In some cases, it can even be life-threatening. That’s why it’s important for governments and landowners to have a way to detect subsidence as soon as possible. In this blog post, we will discuss the different methods of detecting land subsidence with lidar surveying.
Lidar surveying is a type of remote sensing. It uses laser pulses to measure the distance between the sensor and the ground. By measuring the time it takes for the pulses to bounce back, lidar can create a very accurate three-dimensional map of an area.
One of the benefits of lidar is that it can be used to detect land subsidence. When an area starts to subside, there will be changes in the shape of the ground surface. Aerial Lidar can pick up on these changes and produce a detailed report.
There are two main types of land subsidence: compressive and tensile. Compressive subsidence happens when the ground is being compressed by weight or pressure. This can happen when there is heavy rainfall or when buildings are constructed on top of the ground. Tensile subsidence happens when the ground is being pulled apart by forces such as wind or water erosion.
Aerial Lidar surveying can be used to detect both types of subsidence. By measuring the changes in the shape of the ground surface, lidar can give us a very accurate picture of what is happening underground.
