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There is an increasing requirement for information on the sediment transfer within the fluvial systems of catchment basins of different scales. Little is currently known about the residence times of sediment particles moving through the fluvial system. Such infonnation, for example, may be needed to provide a basis for establishing sediment control strategies, to afford an improved understanding of...
In 1989 a m easuring overflow was built on a small water-course in the East Karkonosze Mountains in order to determine the dynamics of flow and bedload transport. The data collected in a 0.99 square kilometers basin reveal that the bedload m ass in valley river-beds is considerably bigger than in slope streams. It has been shown that the bedload transport process is different for the naturally afforested...
Measurements of suspended load transport is an important element of hydrological measurements. Results have many applications in water management and environment protection. The review o f m easurernent m ethods and equipm ents being in use in hydrological services of many European countries is presented in this paper. The review has shown, that direct method with water sampling in fixed point of...
On the 15 June 2000 A.D . in the area of the Roztocze Tomaszowskie episodic overland flow from agriculture loess catchment (of 50 ha in area and denivelations up to 50 m ) was observed after 10-minutes of a heavy rainfall (Figure 1 and 2). Twenty water samples were taken to measure the suspension value and the measurement of discharge was made in three streams from the subcatchments of differentiated...
The geostatistical structural analysis was used to detect hidden mechanisms of solute transport in two contrasting temperate catchments: low land lakeland one and m ountainous. The data set consist two years of daily measurements of the discharge and two solute components for each catchment. In both catchment dissimilarity structure of analysed data in terms of semivariogram , is much the same: small...
The paper presents the results of analysis of the bed load transport conditions in the river Odra. Parameter Ks/Kr has been estimated for upper and middle course of the river Odra. Its values are considerably less than 1.0 and can be even equal 0.3. The bed load transport intensity has been calculated by means of the Meyer-Peter and Müller formula (MPM). Parameter Ks/Kr, of this formula, has a great...
The investigation of suspended sediment size distribution (SSSD ) was carried on in a small agricultural watershed of Zagożdżonka river. The Low Angle Laser Light Scattering method w as used for SSSD determination. Received results has shown annual changeability in SSSD. The d50 characteristic diameter varied from 0.045 do 0.10 micrometer. The relationship between d50 and mean flow was described.
Analysis variable concentration dissolve and suspended materiał madę for three flow to rise. There flows were on different season and dynamics. In the cool half-year during to rise out is frorn 1.8 to 3.8 ntore times materiał than during warm half-year. In the hydrological years 1999-2000 during to rise the Wieprz River in Guciów out almost half brash.
Contaminant transport in rivers is considered on the basis of tracer studies in Wkra small lowland river. Theories describing the spread of conservative and passive pollutants in the context of a longitudinal dispersion model was given. The analysis is limited to the one-dimensional cases of stationary transport of mass discharged into water flowing in river. It is shown that the model don’t agrees...
Rozwój sektora transportowego jest bardzo ściśle powiązany z procesem rozwoju społeczno-gospodarczego na zasadzie sprzężeń zwrotnych. Transport zbliża do siebie rynki, umożliwia zwiększenie produkcji, aktywizuje regiony wokół infrastruktury, czyli umożliwia pozostałym działom sprawne funkcjonowanie. Transport jest też źródłem wielu znaczących, negatywnych dla społeczeństwa i gospodarki efektów zewnętrznych...
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