Wyniki wyszukiwania

1

Estimation of lag times of rainfall events for three small river basins

100%

Barszcz M., Banasik K., Tonsmann F.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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2006

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tom 09

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nr 2

Lag time of runoff – Lag is one of the characteristic values in rainfall-runoff modeling and lag time of sediment yield – LagS is an important characteristic in the procedure of predicting the suspended sediment rate (sedimentgraph). The relationship between the lag times (LagS/Lag) is used for estimating sediment routing coefficient – B, which is a key parameter of the instantaneous unit sedimentgraph (IUSG). The IUSG formula is needed to transform the sediment produced during rainfall into sedimentgraph. The relationship LagS/Lag was examined for a three small basins (two of which are located in Poland, and one in Germany). The ratio LagS/Lag, estimated for events from the investigated basins, has been in the range from 0.49 to 1.11. A statistical significant correlation has been found between the value of LagS/Lag and rainfall depth in one of the basins.

2

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Suspended sediment concentration and yield in snowmelt flood events in a small lowland river

100%

Hejduk A., Banasik K.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 1

61-68

Results of investigation on suspended sediment delivery from small lowland, agriculturally used catchment of Zagożdżonka River, located in central Poland, during snowmelt periods of 2001– –2007 are presented. The study catchment‘s area, upstream of the well equipped gauging station at Czarna, is 23.4 km2. Suspended sediment concentration and sediment yield has been calculated and analysed for 15 snowmelt flood events. The relationship between suspended sediment concentration and the discharge has been analyzed. It has been found that the relation, in majority of the cases, has the form of clockwise hysteresis, however the existance of other types of hysteresis i.e. anticlockwise and “8” shape, have been also confi rmed. Signifi cant relation between suspended sediment yield and runoff volume of snowmelt flood events has been also found.

3

Untersuchung zum Niederschlag-Abfluss-Verhalten im Einzugsgebiet des Zagozdzonka Flusses

100%

Rottcher K., Homeier M., Banasik K.

Annals of Warsaw Agricultural University. Land Reclamation

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2000

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tom 30

15-27

4

Variability of bedload transport rate during flood flows in the Zagozdzonka River

100%

Popek Z.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 1

69-77

The paper presents the measurement results of bedload sediment transport during the flood flows observed in the Zagożdżonka River. The point for measuring the bedload transport, equipped with sediment catcher, devices for continuous measurements, and automated data recording, was localized above the Czarna gauge station in catchment studied by the Department of Hydraulic Engineering and Environmental Restoration, Warsaw University of Life Sciences – SGGW. The results of bedload transport measurements during one of the flood flow waves were compared to those calculated by using the Bagnold’s formula. To determine the critical bed-shear stress, the Author’s formula resulting from laboratory experiments, was used. Calculated variability of bedload transport rate during analyzed flood flow wave apparently differed from that directly measured. Nevertheless, mass of bedload achieved from calculations was lower by 6% than that from measurements, which can be considered as good result consistence.

5

The influence of morphological changes of small lowland river on discharge rate

100%

Oleszczuk R., Urbanski J., Gasowska M.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2014

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tom 46

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nr 4

The aim of the study was the comparison of the changes of cross-sections and longitudinal profi le of the Mała river at the distance of 600 m. The paper presents the geometry changes of the river from field measurements made in 2013 in comparison with design assumptions from 1967 which were implemented in 1971. The four (available historical) cross-sections (hm 7+700, 7+800, 7+900, 8+000) and longitudinal profile (hm 7+700÷8+300) of the river were analysed and compared. The large scale of subsidence of the land surface on both banks was observed (even to 0.5 m). Probably it is the effect of peat shrinkage and mineralization processes of organic soils. The bottom of the Mała river was still located at the same altitude in sand deposits in the analysed period 1971–2013. The designed slope of bottom of the Mała river equals 0.7‰ (1967) and present slope (2013) was estimated to be around 1‰. The subsidence of peat layers on both river banks, changes in cross-sections’ parameters (present irregular shapes in comparison with designed trapezoidal cross-sections) caused the reduction of cross-sectional area and water discharge of about 40–50% in comparison with parameters designed in 1967 and made in 1971.

6

The revitalisation of creeks

100%

Krovak F.

Przegląd Naukowy Wydziału Melioracji i Inżynierii Środowiska

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1996

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nr 12

7

Evaluation of the aluminium load in the aquatic environment of two small rivers in the Baltic Sea catchment area

84%

Senze M., Kowalska-Goralska M., Bialowas H.

Journal of Elementology

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2015

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tom 20

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nr 4

The study covered the aquatic environment of two small rivers in Western Pomerania, Poland, such as the Czerwona and the Grabowa. Its purpose was to determine aluminium bioaccumulation in the aquatic environment by testing water, bottom sediments and aquatic plants. Samples were taken in the summers of 2008-2011. pH, electrolytic conductivity and aluminium concentration were determined in water samples, while the sediment and plant samples were submitted to analyses of the aluminium content. The water pH oscillated between 6.04 and 8.95, while the electrolytic conductivity ranged from 440 to 1598 μS cm-1. The aluminium concentration in the river water was up to 0.138 mg Al dm-3 in the Czerwona and up to 0.425 mg Al dm-3 in the Grabowa. The maximum aluminium content in the bottom sediments was 47.01 mg Al kg-1 in the Czerwona River and 26.15 mg Al kg-1 in the Grabowa River. The maximum aluminium content in the aquatic plants sampled from the Czerwona was 91.63 mg Al kg-1, and from the Grabowa – 1,077 mg Al kg-1. The bioconcentration factor (BCF) of aluminium for the Czerwona River ranged from 5.06 to 24,052, and for the Grabowa River – from 1.10 to 70,132. The concentration factor (CF) of aluminium in the bottom sediments oscillated between 66.72 and 23,492 in the Czerwona River and between 14.81 and 2,763 in the Grabowa. The aluminium content in the two rivers was relatively low in the water, sediments and aquatic plants, which is typical of environments without strong anthropopressure. The values fell within the limits set by environmental water quality standards. The low aluminium accumulation degrees in the biotic and abiotic components indicate that the environments of the two rivers have a low load of aluminium compounds.

8

The index method of small lowland river environmental evaluation

84%

Oglecki P., Pawlat H.

Annals of Warsaw Agricultural University. Land Reclamation

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2000

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tom 30

37-43

9

Reduction of zooplankton communities in small lake outlets in relation to abiotic and biotic factors

84%

Czerniawski R., Domagala J.

Oceanological and Hydrobiological Studies

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2013

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tom 42

|

nr 2

10

Impact of natural chanelization of a small lowland river on biodiversity of fish communities

84%

Rechulicz J., Gorzel M., Kornijow R.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

|

tom 01

11

Analysis of the connections between hydromorphological conditions and biocenotic diversity on the example of the Zwolenka River

84%

Sawa K., Popek Z.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2011

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tom 43

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nr 2

12

Numerical modelling of groundwater flow for an aquifer in a small river catchment

84%

Lieber A., Mioduszewski W.

Journal of Water and Land Development

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2002

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nr 06

Numerical models are not only applied for predictions but also with the aim to improve the understanding of certain geological and hydrogeologie conditions. In this case of a three dimensional flow pattern to a small brook in the catchment area of the Raszyn Ponds nearby Warsaw the numerical groundwater flow model MODFLOW was used to: 1. Verify the conceptional understanding of the area in order to prove if a hydrogeologie window exists which is feeding the present aquifer. 2. Calculate travelling times of groundwater from the upper agriculturally used part of the aquifer to an experimental field in the lower part of the basin. The realisation of the hydrogeologie window in MODFLOW is described as well as the verification of the assumed conception, and results from travelling time calculations are shown.

13

Reconstruction of retention capacity of small river basins as a protection measure against floods and droughts

84%

Mioduszewski W.

International Agrophysics

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1998

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tom 12

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nr 4

14

Gonadogenesis in chub Squalius [Leuciscus] cephalus [L. 1758]

67%

Hliwa P., Zyla A., Krol J.

Folia Biologica

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2009

|

tom 57

|

nr 3-4

115-120

15

Probable annual floods in a small lowland river estimated with the use of various sets of data

67%

Banasik K., Byczkowski A.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2007

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nr 38

3-10

The results of estimation of the probable annual fl ood fl ows with the use of various sets of data from a small agricultural lowland river are presented. The traditional statistical series are formed from the annual maximum (AM) fl ows of hydrological years. After examination of the homogeneity of the series, two sets of data were formed (AM1 of 34 elements and AM2 of 40 elements), which differed in the signifi cance level of one of the stationary tests. The other series for fl ood frequency analysis has been formed by selecting peaks over threshold discharges (POT). A computer program, developed by IMGW (Institute of Hydrology and Water Management), and spreadsheet were applied for frequency analysis with the use of AM series and POT series, espectively. Results of computations with the use of AM1 and AM2 data indicate for nonsignifi cant differences in probable fl ood fl ows, and signifi cant with the probable fl ood fl ow estimated with the POT data.

16

Threats to a small river and its urban catchment: Hydrological and hydrochemical assessment of Jaroszowka River in Bialystok, Poland

67%

Jekatierynczuk-Rudczyk E.

International Journal of Ecohydrology and Hydrobiology

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2008

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tom 08

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nr 1

Hydrological and hydrochemical analyses in the Jaroszówka river basin were carried out in hydrological year 2003. The quality of the Jaroszówka water is characterized by the lowest level of transformation of physical and chemical composition among the Białystok rivers. Specific pollution load, which was discharged from the catchment to the Jaroszówka riverbed was much smaller than the load discharged to the main Białystok waterway (Biała), but was similar to the load of the small urban rivers (Bażantarka and Dolistówa). A lower degree of the Jaroszówka spring water transformation demonstrates a significant role for pollution that flows directly to the riverbed.

17

A massive freshwater mussel bed (Bivalvia: Unionidae) in a small river in Ukraine

67%

Protasov A., Sylaieva A., Morozovska I., Lopes-Lima M., Sousa R.

Folia Malacologica

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2015

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tom 23

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nr 4

18

Monitoring of the topmouth gudgeon, Pseudorasbora parva (Actinopterygii: Cypriniformes: Cyprinidae) in a small upland Ciemiega River, Poland

67%

Rechulicz J.

Acta Ichthyologica et Piscatoria

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2011

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tom 41

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nr 3

Background. The topmouth gudgeon, Pseudorasbora parva (Temminck et Schlegel, 1846) (known also as stone moroko), is an alien species of the fish fauna of many European freshwater ecosystems. In large quantities, its may affect negatively the fish fauna and the functioning of ecosystems. It competes for food with native fish species and they occupy their habitat. The knowledge about the invasion dynamics may help to find suitable control measures. The aim of this study was to find and observe the population of P. parva in a small river. Materials and methods. Inventory fishing on three sampling sites at the Ciemięga River was carried out from 2003 to 2007. The abundance and density of P. parva in the river were calculated. The size distribution of P. parva and its length–weight relation were determined. Abundance, density, length, and mass of the fish from all study sites were analyzed statistically. Results. P. parva was first recorded in the Ciemięga River in the autumn of 2005. The abundance of P. parva in relation to the structure of the local ichthyofauna was the smallest in the spring and the highest in autumn. The total length of P. parva ranged from 15 to 104 mm, and the mass from 0.2 to 10.4 g. Taking into account the number of the specimens, P. parva constituted between 0.9% and 57.2% of the local ichthyofauna, while its mass ranged from 0.0% to 35.1% depending on the study site and the season. The density of P. parva ranged from 72.9 to 6.5 CPUEn, while the mean value for the river was 30.6 CPUEn. Conclusion. In Polish waters P. parva is an alien species and there is still little information about its occurrence in the flowing waters. Since 2005, this species was present almost in all inventory catches in the Ciemięga River. Its presence was dependent on the kind of the habitat and the presence of predatory fish species (eg brown trout). P. parva occurring numerous may be a lot of competition for native fish species, and therefore an important problem is to understand his habitat preferences and interactions with native fish species.

19

Potamozooplankton communities in three different outlets from mesotrophic lakes located in lake-river system

67%

Czerniawski R., Domagala J.

Oceanological and Hydrobiological Studies

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2012

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tom 41

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nr 1

20

Zooplankton of Mokraya Sura river

67%

Yakovenko V., Fedonenko E.

International Letters of Natural Sciences

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2016

|

tom 51

Structural and functional characteristics of zooplankton as well as the results of biotesting were researched to indicate the ecological status of Mokraya Sura river sites. Zooplankton sampling was performed at the sites of Mokraya Sura river in autumn 2014 and in spring 2015. Species composition and abundance of zooplankton showed that zooplankton is most depressed at the upper sites of the river due to joint effect of slime accumulation eutrophication and industrial sewage. Biotesting results estimated water quality of the site near aeration plant sewage emergency discharge as most polluted of the river sites where large abundance and biomass of zooplankton were created mostly by planktonic rotifers. Large figures of filter-seeding crustaceans as well as low saprobity index indicate improvement in water quality at the sites 3 km and 2 km upstream from the river mouth.

Ograniczanie wyników

Estimation of lag times of rainfall events for three small river basins

Suspended sediment concentration and yield in snowmelt flood events in a small lowland river

Untersuchung zum Niederschlag-Abfluss-Verhalten im Einzugsgebiet des Zagozdzonka Flusses

Variability of bedload transport rate during flood flows in the Zagozdzonka River

The influence of morphological changes of small lowland river on discharge rate

The revitalisation of creeks

Evaluation of the aluminium load in the aquatic environment of two small rivers in the Baltic Sea catchment area

The index method of small lowland river environmental evaluation

Reduction of zooplankton communities in small lake outlets in relation to abiotic and biotic factors

Impact of natural chanelization of a small lowland river on biodiversity of fish communities

Analysis of the connections between hydromorphological conditions and biocenotic diversity on the example of the Zwolenka River

Numerical modelling of groundwater flow for an aquifer in a small river catchment

Reconstruction of retention capacity of small river basins as a protection measure against floods and droughts

Gonadogenesis in chub Squalius [Leuciscus] cephalus [L. 1758]

Probable annual floods in a small lowland river estimated with the use of various sets of data

Threats to a small river and its urban catchment: Hydrological and hydrochemical assessment of Jaroszowka River in Bialystok, Poland

A massive freshwater mussel bed (Bivalvia: Unionidae) in a small river in Ukraine

Monitoring of the topmouth gudgeon, Pseudorasbora parva (Actinopterygii: Cypriniformes: Cyprinidae) in a small upland Ciemiega River, Poland

Potamozooplankton communities in three different outlets from mesotrophic lakes located in lake-river system

Zooplankton of Mokraya Sura river