DBPapers
DOI:10.5593/SGEM2013/BC3/S12.003

APPLICATION OF GIS AND MATHEMATICAL MODELS IN BASIN MANAGEMENT – A CASE STUDY IN THE UPPER MORAVA RIVER BASIN

V. Rihova, J. Unucka, M. Podhoranyi, M. Gergelova
Monday 5 August 2013 by Libadmin2013

References: 13th SGEM GeoConference on Water Resources. Forest, Marine And Ocean Ecosystems, www.sgem.org, SGEM2013 Conference Proceedings, ISBN 978-619-7105-02-5 / ISSN 1314-2704, June 16-22, 2013, 19 - 30 pp

ABSTRACT

Fluvial processes in the landscape comprise river erosion and subsequent sediment transport and deposition. The river is an irreplaceable landscape component and an important landscape formation element. It is not only local climatic conditions and tectonic movements that influenced the development of Quaternary fluvial processes. In the last c. 10 000 years the human society has been changing the natural ecosystem.
The landscape was completely changed by man who created fields and pastures and established permanent housing estates turning continuous forests into a mosaic of open and forested areas, or uneven spread of green spaces, and some fertile landscape with favourable soil conditions into a forestless steppe. As a result, this affected the intensity of geologic processes. An example can be the process of landscape deforestation and soil denudation that lead to increased erosion, and sediment transport and accumulation in alluvial plains of rivers. [19]
Soil erosion, particularly accelerated soil erosion, is a worldwide problem that stands for one of the most urgent threats, along with the world population growth rate and uneven distribution of natural resources on the Earth. The development of information technologies and other related branches offers certain possibilities applicable in river basin management.
The modelling of land cover changes and their influence on runoff conditions and erosion sedimentation processes was carried out using USPED erosion model, SWAT dynamic erosion model and HEC-RAS and MIKE 11 hydrodynamic models. USPEC model was used to simulate spatial distribution of erosion and sediment deposition in order to outline potentially dangerous areas within the studied territory. SWAT model was used to quantify the transport of sediments, biochemical elements, pesticides and fertilizers from the basin as well as their transport downstream. HEC-RAS and MIKE 11 hydrodynamic models enabled detailed modelling of transport and accumulation of sediments along with the analyses of river bed and river bank erosion.

Keywords: hydrological modelling, Quaternary fluvial processes, anthropogenic erosion, Horni Morava River