Stav a budoucí vývoj odtrženého meandru
v CHKO Litovelské Pomoraví

SUMMARY

This thesis describes results of long-term monitoring in the Kenický meander. The area of interest is located in Protected Landscape Area Litovelské Pomoraví as part of National Natural Reservation Ramena řeky Moravy (Channels of Morava river) and Natural reservation Kenický. There was made four data collections of cross section profiles from autumn 2011, spring 2012, spring 2013 and summer 2014. Surveying was focused on water level, sedimentation, bank line, channel bars, bank failures and woody debris and accumulation. Fourteen cross section profiles of river was created by geodetic leveling survey.

First part of thesis is issue introduction of processes in meander channels.Meanders has several types of migration and development. Most important process of river evolution is neck cut-off of meander. Also this happened in Kenický meander in spring 2012. In the Litovelské Pomoraví has Morava river natural channel pattern and there is also woody debris in the channel. It enhances the ecological status of the river and ecosystem of river with high amounts of woody debris show higher habitat and species diversity.

In thesis was investigated historical line of water channels by historical maps and historical airborne photography in the area of interest. Also several current UAV photogrammetry images was taken by Dr. Miřijovský. After georeferencing of the historical photos was created historical bank lines of Morava river between 50's of 20th century and beginning od 21st century. Analysis of hystorical bankline shows quantified changes of MOrava's channel. River was affected by humans in the late 19th century, when was cutted-off double meander before today's Kenický meander. Reaction of higher energy in river started evolution of Kenický meander.

From obtained data by surveying was created sediment situation maps. This maps are available as annex of thesis. Comparison of transversal profiles shows immediate start of sedimentation (area and maximum depth of the profiles was less) in old river channel and horizontal and vertical erosion of channel after meander ex-neck.

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