Summary:

The main aim of the article is to show (present) the influence of vegetation zone on concentration of suspended load. New standards (principles, rules) of river engineering conducted in harmony with nature assign enormous plant significance. It is treated not only as a natural factor but also as a component of hydraulic reaction which clearly shapes hydraulic and hydrologic conditions. Until recently it was generally believed that vegetation is only the faktor which makes exploatation of water facilities difficult and unfavourably influence on structure working. At present vegetation has begun to be appreciated as a new element in contemporaly water management which may favourably influence on hydraulic conditions. Vegetation may cause riverbed roughness changes, bed configuration changes, water level slope changes increase of riverbed erosion resistance and also may cause retention of considerable amount of suspended load transported by (in) the river. Existing of vegetation zone in rivers and reservoirs influences on fluvial processes. Vegetation degree and its vertical and horisontal dimension influence on longitudinal and transverse transport of suspended load as well as its variation dynamics. The research of the suspended load transoport in vegetation zone was conducted in Institute of Environmental Engineering on model in scale 1:1. The aim of the research was to estimate hydraulic characteristic of the flow vegetation zone and analyze of interaction of vegetation and suspended load on the sedimentation processes and sorting of suspendned load.