Vol. 10 No. 3-4 (2016)
Articles

Studying the development of fluvial landforms in the Berettyó-Körös Region using geoinformatic methods

Published September 4, 2016
Csaba Albert Tóth
Norbert Barkóczi
Richard William Mcintosh
Zsolt József Plásztán
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APA

Tóth , C. A., Barkóczi , N., Mcintosh , R. W., & Plásztán, Z. J. (2016). Studying the development of fluvial landforms in the Berettyó-Körös Region using geoinformatic methods. Landscape & Environment, 10(3-4), 137–144. https://doi.org/10.21120/LE/10/3-4/6

Development of fluvial landforms from 1980 till nowadays was studied based on digital elevation maps
(DEM) composed from contour lines of topographic maps, field data obtained by RTK GPS and aerial
photos taken by a drone. Greatest denudation of 6-9 metres was measured in the eastern side of the
erosional valley at Pocsaj caused by piping and mass movements. As a result, the valley widened and
slightly deepened. Since 1980 around 1-2 metres of accumulation and erosion of similar rate have been
measured in the secured floodplain environment dissected by abandoned beds, point-bars and swales
at Kismarja. These values, however, rather reflect the geometric uncertainties and deficiencies of the
contours of topographic maps than real land changes. Therefore topographic maps can give reliable basis
for studying the development of lowland landforms only if they depict adequately large sized (minimum
100 x 100 m) positive or negative forms with great height difference as well (minimum 8-10 m). Accuracy
of DEMs composed from aerial photos using photogrammetric methods – taking off height faults caused
by vegetation – is around the same as that of the models created on the basis of RTK GPS measurements.

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