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Them ain scope of the research was to estimate rainfall and run off erosivity factor for climatic conditions of south-westem Poland. The analysis was made on the base of 1966-2000 rainfall intensity data from Wrocław Swojec gauging station localized in the Lower Silesia region. Calculated average for years 1966-2000 rainfall and run off erosivity factor R for Wrocław Swojec was equal to 63.7 M J ha-l...
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...
Unfavorable changes are taking place in plant assemblages of Kampinoski National Park resulting from lowering of the ground water level. The reasons for that are agricultural drainage, watercourse regulation, embankment of Vistula River and the lack of planned water economy. Numerous underground water intakes and hydrological droughts in the park protection zone also contribute to the lowering of...
The paper presents relation between evaporation stated by two different and independent methods: calculated one on the basis of profile meteorological elements measurement and pan evaporation. The relationship between daily amounts of these kind of evaporation strong and for short period (i.e. 30 minute amounts) has two.
The satisfactory disposal of scrap tires is a major problem worldwide. This paper deals with the scrap vehicle tires management at Poland, which was examined in terms of actual law , especially the UE legislation, where used tires were identilied as a priority waste stream. The technical possibilities of rubber products re-use are presented with special attention given to material recycling as it...
In the paper problem of the accuracy of the affine transformation of the map on the base of the electrophotographic conversion are presented. The investigation prove that accuracy o the above method is similar to accuracy of the digitalisation of the map.
In the paper results of monitoring quantity and quality of water on areas of different land utilization were analyzed. The analysis was carried out on the basis of measurements made in hydrological years 1998-2000 in the Hutka (0.52 km2) and the Potaszka (1.33 km2) river catchments. These catchments are located near Poznań in the southem part of the Wielkopolska Lake District, Poland. Obtained reduction...
The study was aimed to compare the suitability of selected statistical methods for estimation of the equations describe seasonal course of evaporation in Ursynów. Three method was considered: harmonical regression, Fourier spectral analysis and polynomial regression. Chart of the functions analysis and correlation coefficients comparision shows the best fitting for polynomial equations.
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...
Weather and plant vegetation data gathered by the observation net of the Institute of Meteorology and Water Management in Warsaw were used to describe agrometeorological conditions in spring and summer of the year 2002. The probability of lower rainfall than the real sum in during periods with their highest shortage, and climatic water balance in May and June as well as in the second and third quarter...
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.
Results of water erosion studies on loess soil were presented. Analysis of data front plots of different length showed that process of erosion should be considered simultaneously in the terms of soil loss and the effective distance of soil transport. Soil losses expressed per unit area were similar to the data predicted from the USLE only inside the effective distance of soil transport (ranging front...
The results of measurements of temperature gradient at soil adjacent air layer (to 3 m) w as presented in the article. For average weather conditions mean air temperature gradient in 3 - meter air layer is 0,04°C/1 m. Author analyzed in the work errors of differential refraction, appearing in geometrical levelling, which can reach in unfavourable conditions 4 mm/1 km.
The prediction of water quality in natural rivers requires the solution of the mass-transport equation. The accuracy of the numerical solution is highly dependent upon the accuracy of longitudinal dispersion coefficient. The values of dispersion coefficients calculated form easured concentrations in Wkra River have been compared with values calculated using existing empirical equations for the dispersion...
Mean duration of heat balance components during autumn nights with advection-radiation and radiation weather in years 1994-1999 were stated on the basis of data observed in meteorological station Ursynów-WAU. Mean fluxes of heat balance components and values of components ratios are presented in tables.
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