APPLICATION OF DIGITAL PHOTOGRAMMETRY AND IMAGE PROCESSING TECHNIQUES FOR HYDRAULIC MODEL EXPERIMENTS

摘要

Stability and suction removal of the sand bed under the rock-armoring layer were exposed under the wave and discharge generated steady flow and coexisting flow investigated at apron area of the open channel discharge system. Determination of the stability of the armoring layer was achieved by micro and macro scale tests focused just sample stone(s) and all armoring area in 1/25 scale laboratory physical model. In this study, two methods are used in order to investigate probable displacement caused by the water flow in a hydrological experimental setup. The setup is a scaled model of an harbor in Omman, UAE, which is already in construction. Both methods are dealing with photos taken with a digital camera. The photos are taken in four epochs. The first epoch of photos has been taken just after the construction of the experimental setup. This causes the first epoch of photos to be the reference set. Between the following three epochs, an hydraulic experiment has been taken place. Comparison these three epochs of photos with reference set and each other results the investigated probable displacement. The data contains all the photos and the terrestrial measurements. The difference of methods is the processing of the data. The first method is the standard photogrammetric method, where the second one deals much more with image processing. The results of these two methods will be compared with each other in order to give accuracy. Image processing techniques was applied at macro scale tests of the armoring area before and at the end of the experiments. Instability was not determined for whole armoring layer after the both image processing processes and photogrammetric approach.