DOI: 10.5593/SGEM2014/B31/S12.099


K. Kramska, K. Vrana
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 775-782 pp

This article deals with describing of sheet erosion at the experimental area of The Pozarsky stream catchment. The experimental area is located near the town rivoklát, in the Central Bohemian Region, where highlands dominate. This area is characterized by the occurrence of very deep valley, shaped like the letter "U" to "V", which contain torrents and often deep gullies. In this experimental area, there are built five torrent control cross-section objects. Especially two of them are located in the gullies, which are surrounded by managed fields. There is an assumption of the sheet erosion occurence. In this topic, there are two „points of view“ presented – solving of water erosion at fields which is presented mainly like soil loss and on the other hand there is solving of sediment transport at steep land area at a torrent (gully) catchment. To understand the principles of release, transport and storage of sediment in the channel of torrent (in the bed of gully) it is needed to calculate sediment transport regime. For the calculation it is necessary to carry out detailed field surveys and surveys about erosion in the area. The calculation give an overview of the formation of sediment in the catchment, especially with their assumed amount and volume. This knowledge contains basic data for the design of appropriate torrent control objects, such as constructions of some cross-section objects, and then determines the type and parameters of necessary precautions and in this case it gives the possibility to verify torrent (gully) control objects functions. Attention is focused on defining the source areas of released sediment particles in the catchment and their movement in the bed of the stream (gully) from their place of release to their place of storage (in the streambed area or retention capacity of the experimental objects).

Keywords: Water erosion, sediment transport, torrent and gully control 775