Complex Monitoring of the Coastal Cliffs on the Example of Cliff in Jastrzebia Gora, Poland

The cliff coasts, which are in total about 100 km long, are especially vulnerable to abrasion. The mean regression of the studied object which is the seacliff in Jastrzebia Gora depends on time. For example, from 1875 to 1937 the cliff regress 90 m in mean pace of 1.4 meter a year. Besides of natural factors causing the degradation, there is also an anthropogenic activity, which speeds up the abrasion process. Based on these informations, the monitoring of the cliffs susceptibility is important, not only in reference to its geometry but also for geomorphological aspects. There are numerous studies on stability issues of polish cliffs, based on classical measurements methods. In case of the modern geometry monitoring there are many forms to estimate the regression of the cliffs with high precision and accuracy.