ELEVATION SURVEYS FOR THE DETERMINATION OF CLOGGED AREAS ON A SECTION OF THE NERA RIVER PUBLISHEDAdrian Şmuleac, Silvica Oncia, Cosmin Popescu, Laura I. Şmuleac None
The topographic elevations for this paper were done within the ballast operations area at Naidas. The area is located along the Nera River, in Caras-Severin County. The topographic and land survey measurements were taken with the Leica TPC 805 Total Station, and the data were downloaded with the LEICA Geo Office Tools software. The total station is an optical device used for topographic measurements. It is a combination of the classic theodolite and an electronic instrument for measuring distances. The total station can include a small computer that provides storage capacity and makes precise calculations. The measurements were taken along the Nera River, on 350 metres, downstream Naidas and upstream from the bridge on DN57 that crosses the river. After field reconnaissance and the identification of the operations area, a planimetric traverse and detailed elevation was performed. The operations area covers 25,335m 2 . The coordinates were determined in Stereo ’70 system, and the elevation system was sent from the rod on the bridge pier. The “0” elevation on the rod is considered the 107.27 m elevation - the Baltic Sea. The data typed into the computer were processed with special software applications. The calculations of the geo-topographic support networks were done with the TOTAL 2.0 software. The (temporary) coordinates of the points to be determined are done automatically. The compensation of the support network is done with the least squares method, the indirect measurement method. The software creates a DFX file that can be used with the AutoCAD package at a later time. TOTAL 2.0 calculates and, where necessary, compensates any combination of direction and distance measurements, from the easiest (cancellation of registration, multiple intersection, multiple resection) to the most complex ones (various traverses, polygonometric networks, triangulation).
topographic elevation; ballast operations area; total station; temporary coordinates