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DEVELOPING CONVERSION AND TRANSFORMATION PARAMETERS TO IMPROVE NAVIGATION ON LOWER DANUBE
Abstract
In order to improve navigation on the Lower Danube area, some European projects are underway. The focus of FAIRway Danube project (2015-2020) is to provide current and harmonized information about shallow sections, water levels and water level forecasts. Available depths will be used optimally by adapting the location of the waterway to the current riverbed conditions. In parallel, FAIRway Danube is aiming at preparing the harmonized rehabilitation of the Danube and its navigable tributaries. The bilateral conventions and agreements signed by Romania and Bulgaria, as well as between AFDJ Galati (Romania) and IAPPD Ruse (Bulgaria), establish the responsibilities for maintaining the appropriate airworthiness conditions from km 845 to km 375. The authorities of both states have agreed to significantly improve airworthiness in the Danube section, their intention being to minimize as much as possible periods of time when commercial navigation is not possible: both during the winter, when ice climbs occur, and in summer when the Danube level is very low. As a support of the FAIRway Danube project, geodetic activities in that area included in last years geodetic observations (GNSS, leveling, bathymetry, Lidar). Previous geodetic studies established connections between CRS (Coordinate Reference Systems). If 2D connections are more easily to be established, the height connection between the old and new CRS on the left and right bank of the Lower Danube are more difficult to be established. The present study shows a way to be able to transform the heights from this area between different reference systems (Black Sea, Baltic Sea, EVRF). As a final product, a quasigeoid model and a sofware were realized and implemented at AFDJ Galati and IAPPD Ruse.
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