Abstract
Abstract River bank erosion, accretion and lateral channel migration are the most important geomorphological processes, which attract a great deal of attention from river engineering scientist over the last century. in the presented study, we assessed how the river’s shape and position have changed during 1958-2013 period using remote sensing and GIS. We have identified that the total area of bank erosion during given period equalled 8.3430 km2, of which 3.2593 km2 were on the left bank and 5.0837 km2 on the right bank. The total area of bank accretion from 1958 to 2013 equalled 10.7074 km2, of which 5.4115 km2 was on the left bank and 5.2958 km2 on the right bank. The Bosna riverbed average movement in the period 1958-2013 was established in the amount of 132.4 m. During this period, the average lateral channel migration was 2.5 m per year. The data presented here are significant for practical issues such as predicting channel migration rates for engineering and planning purposes, soil and water management.
Highlights
Understanding the mechanisms and rates of bank erosion, accretion and lateral channel migration has fundamental significance, as well as results of these researches which are applicable in the field of water and soil resources management, hydro-technical works, and in different aspects of the environmental protection (Thorne 1982, Lawler 1993)
We have identified that the total area of bank erosion during given period equalled 8.3430 km2, of which 3.2593 km2 were on the left bank and 5.0837 km2 on the right bank
The Bosna riverbed average movement in the period 1958–2013 was established in the amount of 132.4 m
Summary
Understanding the mechanisms and rates of bank erosion, accretion and lateral channel migration has fundamental significance, as well as results of these researches which are applicable in the field of water and soil resources management, hydro-technical works, and in different aspects of the environmental protection (Thorne 1982, Lawler 1993). Lateral migration of the Bosna river has caused a serious problem because of disappearance of arable land and land use changes (Hooke 2003, Dragicevic et al 2013, Tosic et al 2014). The consequences of changes in river course and bank erosion intensity have been well-documented in the literature The Bosna River provides a good opportunity to study bank erosion, accretion and lateral channel migration, considering all the problems that burdened the lower course of the Bosna River we started analysing these processes using available data and GIS. Several different techniques have been used to quantify these processes and different time span, 1 to 10 years for field measurements and 10 to 200 years for maps and aerial photographs (Hooke 1979, 1980, 2003, Hooke, Redmond 1989, Duan 2005)
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