Динамика эрозионно-аккумулятивных процессов на осушенных поймах
2010
Karnaukhov, V.N., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Land Reclamation
Data analysis of long-term observations over the dynamics of erosion and accumulative processes development in reclaimed bottomlands during long-term exploitation was presented. Dynamics of transformation of regulated bottomlands of river-catch-water through the times at the areas being in long exploitation were analyzed in the conditions of the Republic of Belarus. There were considered the processes of surface transformation of bottomland tracts under different conditions of their inundation that may influence the character of erosion-accumulative processes within the bounds of catchment area and in the bottomland itself. There were proposed the systematic approaches for dynamic prediction of erosion-accumulative processes in river-based areas of bottom-lands, the application of which makes it possible to give quantitative assessment of sedimentation content and surface descent. Research results revealed that speed indexes of deposition of sediments in different links of erosive net did not depend on course water course. Action of opposing one another processes was common for the dynamics of river bed evolution on channel areas of reclaimed bottomlands: lowering of bottomland area under influence of a complex of factors (physical-chemical, biochemical, natural and climatic, anthropogenic) caused by breaking in and drawdown of organic-mineral bottom; increasing of bottomland cover at the river bed areas caused by the partial sediments which had moved from river bed to bottomlands
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