The one of the Polish rivers richest in water with substantial flood hazard and important hydro-energy potential. Two large flood protection and hydroenergy schemes were constructed on the Upper Dunajec: Rożnów-Czchów and Czorsztyn-Sromowce Wyżne. Lower Dunajec extends downstream from the Czchów hydraulic barrage to the outflow to the Vistula and is 67.4 km long. Construction of two large hydraulic schemes resulted in the increase of the low and average discharges, however, simultaneously important disturbance of sediment transport occurred. A large amount of sediment is deposited in the reservoirs. As the result of this process, significant erosion was observed along the Lower Dunajec reaching in some places even 4 m. This process was increased by the sediment exploitation from the river channel. Due to flood problems several training works were executed along the Lower Dunajec. All these resulted in lowering of the river channel, which became a draining river. Stabilization of the river channel is possible by means of the construction of special weirs with inflatable gates. Construction of the weirs gives the possibility of using heads for hydro-energy. It is proposed to construct small hydraulic power plants, which would operate during low and average discharges. ...
The main goal of the presented research was to determine the morphological changes in the "regulated" section of the Czarna Nida River caused by four freshets. The surveying measurements of twelve cross-sections, bed material composition and stream velocity were carried out. The changes of the hydrodynamic conditions, having a decisive impact on the intensity of transported material, bank erosion and thus on the channel shape were estimated. The volume of material accumulated within the channel and flood plains and derived from bank erosion was estimated. The Ackers and White- equation was used to calculate the volume of transported material. It was found that the greatest impact on the river channel transformation has the deposition of material.
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Within their catchment basins, brooks and rivers form a structure under which the water flow and morphological processes impact each other. A structure of the flowing water is characterized by such variables as type of substratum, cross-section of the rook channel, longitudinal profile, and horizontal arrangement. Each change in the water flow and intensity of rubble transportation causes the morphology of the brook bed to change, and the direct causes are erosion and deposition processes. The objective of the survey studies presented in this mono-graph was to identify regularities controlling the processes of lateral and deep erosion, transportation, and sedimentation processes in two Carpathian brooks: Słomka and Kasinka. The survey studies were performed in a period from 2004 to 2006.The Słomka brook is a 25.2 km long, left-bank tributary of the Dunajec river and drains an area of 69.90 km2. The Kasinka brook is a right-bank tributary of the Raba river, and it pours into this river at km 92 +750, below the Mszanka brook mouth. The studies comprised both the straight sections of the brook channels and the strongly eroded section along the concave bank (the Kasinka brook). Within the gauging sections, comprehensive measurements were performed in order ...
