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001-es BibID:BIBFORM062293
Első szerző:Bertalan László (geográfus)
Cím:Lateral erosion monitoring along a southern section of Sajó (Slaná) River / Bertalan László, Szabó Gergely
Megjegyzések:The aim of our investigations is to analyse meander and river bank development influenced by natural processes and human activity on the alluvial Sajó (Slaná) River of Hungary.The rate and pattern of meander development was evaluated by analysing horizontal meander parameters. Long term morphological changes of Sajó River were evaluated on the basis of maps aerial photographs (1952, 1956, 1972, 1988, 2000, 2005 and 2011) and the 1:10.000 scale topographic map of Hungary (1980). All resources were geo-corrected by applying the Hungarian EOV coordinate-system. The horizontal channel parameters which reflect the morphological metamorphosis of the river were measured and their temporal changes were evaluated. The determination of these parameters was based on the vectorized bank-lines. In every investigated periods the bank edges were vectorized in ArcGIS then the centerlines were calculated as well.In 4 selected bends and meanders detailed UAV measurements by DJI Phantom 2 quadrocopter were performed between April 2014 and May 2015 to identify bank retreat. The field measurements were supported by Stonex S9 RTK and D-GPS and Spectra Precision Focus 8 Total station. The centerline analysis on the total section of the Hungarian part of Sajó River shows an outstanding shortening between 1952 and 1980 related to the regulation works performed by several industrial purposes. After 1980 the centerline-length of Sajó River started to increase and we suggested that it could be a reason of meander-development along the river.The ortophotographs and DEMs of the banks for the short-term lateral erosion monitoring were created in Agisoft Photoscan by using UAV aerial photographs. The development of the selected bends and meanders supplemented by the UAV monitoring results shows very active bank retreatment rate as 4,5 meters/year (1952-2014) and in some places about 2,4 meters/month.
Tárgyszavak:Természettudományok Földtudományok előadáskivonat
lateral erosion
oldalazó erózió
bank retreat
Megjelenés:Detailed Aerial Mapping and Flood Impact Monitoring in the V4 Region / ed. Andrea Křížová. - p. 4. -
További szerzők:Szabó Gergely (1975-) (geográfus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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