Estimating Stream Bank and Bed Erosion and Deposition with Innovative and Traditional Methods

Understanding the contributions of stream bank and bed erosion will allow us to implement the most effective management practices. The objective of this study was to assess different methods to measure bank and bed erosion at different scales, specifically the watershed, reach and plot. Innovative and traditional methods were utilized. At the watershed scale, indices based on free satellite images were used. For the reach scale, indices were used, but the images with higher accuracy were purchased and captured by unmanned aerial vehicles (UAVs). At the plot scale, erosion pins, cross-sections and laser scanning were applied. The watershed scale analysis showcased “hot spots”. These “hot spots” were reaches vulnerable to erosion and deposition. The indices of the purchased images were applied to these “hot spots” and allowed us to narrow the length of the reaches where UAV flights took place. These flight images located where erosion and deposition occurred. Finally, at the plot scale, laser scanning provided more detailed and accurate data at a greater scale compared to the traditional methods. The implementation of these methods allows us to find the areas vulnerable to erosion and deposition. These are the areas where nature-based solutions should be implemented to effectively mitigate erosion problems

Combining 3D surveying with archaeological uncertainty: the metopes of the Athenian Treasury at Delphi

Summarization: At the archaeological site of Delphi, significant monuments inherently communicate uncertainty regarding the reconstruction of their initial form. An innovative, preliminary, theoretical formulation of a 3D visualization system is proposed, combining 3D surveying based on terrestrial laser scanning and archaeological uncertainty which, unlike past work, will offer multiple hypotheses to be visualized. The system, when implemented, will take as input the archaeologists’ assessment regarding various evidence and offers probabilistic reasoning in relation to the monuments’ past form, which is finally reconstructed and visualized in 3D. The positioning of the metopes of the Athenian Treasury at Delphi is presented as a case study.Παρουσιάστηκε στο: 2021 12th International Conference on Information, Intelligence, Systems & Application