Modelling the impact of anthropogenic modifications to river channels on the course of extreme floods
Czech Republic ; Flood ; Human impact ; Impact ; Modelling ; River bed
This paper presents the results of analysis of the impact of anthropogenic modifications to river channels on the course of floods by means of hydraulic modeling. The study is focused on the quantitative analysis of changes of the flow dynamics
in the river bed and in the inundation zone due to river network modifications. The one-dimensional hydraulic model HEC-RAS coupled with GIS is used to simulate the effect of the river channel changes on the course of extreme flood. - (EN)
Czech Republic ; Drainage network ; Flood ; Geographical information system ; Nineteenth Century ; River basin ; Thematic map ; Twentieth Century
The article is focused on the historical shortening of the river network as on of the important factors influencing the course and consequences of the floods. The solution is based on GIS analysis of various data sources - historical maps covering
Flood ; Human impact ; Land use ; Natural environment ; Natural hazards ; Vulnerability
This text presents the position of floods among various natural hazards which is discussed from the point of view of economic. It is possible to reduce vulnerability of natural environment and social links in a way to minimize consequences
Czech Republic ; Flood ; Fluvial deposit ; Heavy metals ; Hydrochemistry ; Pollution ; Surface water ; Water quality
numerous water basins where the contamined sediments were washed out and the pollution load levels dropped, the Střela River Basin did not record significant changes in pollution level related to the flood. - (EN)