Wyniki wyszukiwania

1

Roofing materials as pollution emitters - concentration changes during runoff

100%

Tobiszewski M., Polkowska Z., Konieczka P., Namiesnik J.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 5

The influence of roofing material on concentrations of pollutants in roof runoff waters and changes of pollution concentration in time were investigated. In field studies four roofing material types were taken into consideration: ceramic tile, bituminous membrane, asbestos tile, and zinc sheeting. Samples were collected from November 2007 to March 2008. Anions, cations, metals, PAHs, pesticides, and PCBs were determined. The existence of the first flush phenomenon for most pollutants was confirmed, with concentrations up to two orders of magnitude higher in first flush compared to steady state conditions. Time trends of pollutant concentration changes were observed. Additionally, analysis of a series of samples collected from melting snow accumulated on the roof showed an increase of organic pollutant concentrations during thaw.

2

Investigation on cyclicity of underground runoff fluctuations

100%

Bondarczuk Z., Ronikier G.

Annals of Warsaw Agricultural University. Land Reclamation

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1987

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tom 23

3

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Thermal and snow conditions of winters and winter floods on example of Zagozdzonka River

100%

Hejduk A., Hejduk L.

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 1

Thermal and snowy conditions in Zagożdżonka River catchment during hydrological years 2003–2013 and winter floods are presented in paper. The meteorological and hydrological data, such as maximum, minimum, mean diurnal air temperatures, daily snow cover depth, and water discharge, collected at Czarna station (WULS-SGGW) have been used. Meteorological conditions were analyzed using indexes proposed by Paczos. Temperate cold and extraordinarily low snowy winters has dominated in Zagożdżonka catchment in presented period of time. Winter floods as a result of snowmelt have been observed almost each year, except 2008 when winter was mild and extremely low snowy. The relation between winter severity index (WOz) and winter snowiness index (WSn) has been estimated, as well as the relation between winter snowiness index and maximum discharge (Qmax).

4

Application of a particle swarm optimization to a physically-based erosion model

86%

Santos C. A. G., Pinto L. E. M., De Macedo Machado Freire P. K., Mishra S. 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

39-49

The difficulties involved in calibration of physically based erosion models have been partly attributable to the lack of robust optimization tools. This paper presents the essential concepts and application to optimize channel and plane parameters in an erosion model, with a global optimization method known as Repulsive Particle Swarm (RPS), a variant of Particle Swarm Optimization (PSO) method. The physically-based erosion model that which was chosen is called WESP (watershed erosion simulation program). The optimization technique was tested with the field data collected in an experimental watershed located in a semi-arid region of Brazil. On the basis of these results, the recommended erosion parameter values for a semi-arid region are given, which could serve as an initial estimate for other similar areas.

5

Effect of a land reclamation system on the volume and seasonality of nitrate runoff from croplands

86%

Koc J., Solarski K., Rochwerger A.

Journal of Elementology

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2007

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tom 12

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nr 2

The paper contains the results of eight-year-long studies on the runoff of nitrates from heavy soils used as croplands. The runoffs of nitrates from a drainage catchment and a catchment drained with ditches were compared. The drainage system was found to carry away twice as much water, with a five-fold higher concentration of nitrates and 20-fold higher load of nitrates, than the system of ditches. High runoff of nitrates (22 kg ha-1 annually) from the soils drained by drains was distributed quite evenly throughout the year, with maximum peaks in March and June. Nitrate runoff through the system of ditches was low (1.15 kg ha-1 annually), reaching maximum peaks in March and April (62% of the load), but disappearing in the summer.

6

Response of the Gulf of Gdansk diatom flora to the sewage run-off from the Vistula river

86%

Stachura K., Witkowski A.

Fragmenta Floristica et Geobotanica

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1997

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tom 42

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nr 2

7

SWAT based runoff and sediment yield modelling: a case study of the Gumera watershed in the Blue Nile basin

72%

Asres M. T., Awulachew S. B.

International Journal of Ecohydrology and Hydrobiology

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2010

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tom 10

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nr 2-4

Land degradation caused by soil erosion (sheet and rill erosion) and soil fertility decline is a serious threat in the Ethiopian highlands, especially in the Gumara watershed. In this study the SWAT (Soil and Water Assessment Tool) model was applied to the Gumara watershed to predict sediment yield and runoff, to establish the spatial distribution of sediment yield and to test the potential of watershed management measures to reduce sediment loadings from hotspot areas. The model was calibrated using five years of flow and sediment records and validated using data for the next three years. Out of 30 SWAT sub-basins, 18 sub-watersheds (72%) were identified as erosion prone areas contributing to a mean annual sediment load ranging from 11 to 22 t ha-1 yr-1. The model was used to evaluate the potential of vegetation filter strips of various widths to reduce sediment production from critical micro watersheds. The installation of vegetation filter strips on vulnerable land was shown to result in a 58 to 74% reduction in sediment yield for strip widths of 5 m and 10 m respectively.

8

Annual runoff and erosion losses of humus-silicate soil from two specific uses due to precipitation in one part of western Serbia

72%

Sekularac G., Stojiljkovic D.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 3

433-440

Erosion factors of a part of Western Serbia, that is, different precipitation amounts and intensities, influencing humus-silicate soil formed on the serpentine, with an 18% inclination toward the northwestsoutheast at the altitude of 300 m, enabled quantitative runoff amounts and soil losses of the fallow and of autochthonous vegetation plot to be defined over a three-year study period. Throughout the trial, the mean annual runoff from the fallow plot amounted to 28.75 l·m⁻², and erosion losses of the soil were 2648.42 g·m⁻². Mean annual runoff and soil losses from the autochthonous vegetation plot were 12.37 l·m-2 and 0.98 g·m⁻², respectively. The total variability of runoff from the fallow plot due to precipitations was 28.1% and that from the plot under autochthonous vegetation was 0.2%. The total variability of soil losses from the fallow plot, due to precipitation, was 43.6% and that from the plot under autochthonous vegetation was 49%.

9

Combined effect of soil bund with biological soil and water conservation measures in the northwestern Ethiopian highlands

72%

Amare T., Zegeye A. D., Yitaferu B., Steenhuis T. S., Hurni H., Zeleke G.

International Journal of Ecohydrology and Hydrobiology

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2014

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tom 14

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nr 3

10

Controlled run-off as method of grassland irrigation and peatland preservation in the Notec River valley

72%

Labedzki L.

Infrastruktura i Ekologia Terenów Wiejskich

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2015

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nr III/2

11

Applicability of the SCS curve number method to tile-drained watersheds

72%

Walker S. E., Banasik K., Mitchell J. K., Northcott W. J., Yuan Y., Jiang N.

Annals of Warsaw Agricultural University. Land Reclamation

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2000

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tom 30

3-14

12

Surface runoff in model field experiment with simulated rainfall and its estimation with CREAMS model

72%

Debicki R., Karpeta K., Pawlowski M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1996

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tom 436

This paper presents the results on surface runoff and soil loss obtained in a model field experiment with simulated rainfall on loessial soil and its estimation with the CREAMS model. Satisfactory agreement between measured and simulated data was achieved.

13

Evaluation of the hydrological role of wetlands in the Wlodawka River catchment (Polesie Lubelskie)

72%

Turczynski M., Michalczyk Z., Chmiel S., Miesiak-Wojcik K., Glowacki S.

Journal of Water and Land Development

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2009

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nr 13b

14

Analysis of the retention capacity of green roofs

72%

Burszta-Adamiak E.

Journal of Water and Land Development

|

2012

|

nr 16

15

Future climate change impacts on the ecohydrology of Guishui River basin, China

72%

Guo B., Zhang J., Gong H., Cheng X.

International Journal of Ecohydrology and Hydrobiology

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2014

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tom 14

|

nr 1

16

Recorded lag times of snowmelt events in a small catchment

72%

Hejduk A., Banasik K.

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 1

The hydrological and meteorological data collected in small, lowland catchment during snowmelt floods have been used to calculate lag time of runoff (Lag) and lag time of sediment yield (Lags). Both, Lag and Lags are important characteristics of the instantaneous unit hydrograph (IUH) and instantaneous unit sedimentgraph (IUSG). Field data from Zagożdżonka River catchment have been used to demonstrate the relationship between lag times. The results of investigation show that: a) there is a strong relationship between Lag and Lags; b) in most cases the value of a= Lags/Lag is smaller than 1; c) in case of snowmelt floods there was only poor correlation between parameter a and the total runoff depth (water supply).

17

Parameters determination of a conceptual rainfall-runoff model for a small catchment in the Carpathians

72%

Karabova B., Sikorska A. E., Banasik K., Kohnova S.

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

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2012

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tom 44

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nr 2

One of the most important tasks in hydrology is to simulate and forecast hydrologic processes and variables. To achieve this, various linear and nonlinear hydrologic models were developed. One of the most commonly applied rainfall-runoff models is the Nash’s model of the Instantaneous Unit Hydrograph (IUH) (Nash, 1957) used jointly with the CN-NRCS method. Within this paper, the Nash’s model was applied to a small forested basin (Vištucký Creek, Slovakia) to reconstruct rainfall-runoff events based on the recorded precipitation. The Vištucký Creek catchment, located in the Little Carpathians, is a part of the flood protection management of regional sites in the Little Carpathians. Therefore, the object of this paper is, first, to determine the parameters of a conceptual rainfall-runoff model for the Vištucký creek catchment, second, to analyse how the selected characteristics of the model depend on the rainfall characteristics, and third, to compare obtained results with a similar study of Sikorska and Banasik (2010). The computer programme developed at the Dept. of Water Engineering (WULS-SGGW) was used to obtain the rainfall–runoff characteristics based on the Nash´s model. The derived characteristics were parameters of the Nash’s model (N, k, lag time) and rainfall-runoff characteristics (sum of total and effective precipitation, rainfall duration, runoff coefficient, time to IUH peak, value of IUH peak, goodness of fit). A relatively small effective precipitation from the rainfall events was derived. For the purpose of the analysis, a correlation between the lag time (and k parameter) and the sum of the total and effective precipitation was used. The use of the conceptual rainfall-runoff model (Nash´s model) for the small catchment in Carpathians was proved to give satisfactory results. The rainfall characteristics derived in this study are comparable to the results obtained by Spál et. al (2011), who used the same catchment in their analysis. Interestingly, our analysis indicated that there is a correlation between the rainfall duration and the lag time, what is opposite to the compared results of Sikorska and Banasik (2010).

18

Effect of surface conditions of runoff and soil loss for chernozem soil

72%

Rejman J., Helming K., Debicki R.

International Agrophysics

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2001

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tom 15

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nr 1

19

Nutrient losses in runoff and eroded sediments from soils of Central Eastern Nigeria

72%

Igwe C. A.

Polish Journal of Soil Science

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2000

|

tom 33

|

nr 1

20

Measuring the energies of aggregate bonding in soils

72%

So H. B., Yatapanage K., Raine S. R.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2B

Ograniczanie wyników

Roofing materials as pollution emitters - concentration changes during runoff

Investigation on cyclicity of underground runoff fluctuations

Thermal and snow conditions of winters and winter floods on example of Zagozdzonka River

Application of a particle swarm optimization to a physically-based erosion model

Effect of a land reclamation system on the volume and seasonality of nitrate runoff from croplands

Response of the Gulf of Gdansk diatom flora to the sewage run-off from the Vistula river

SWAT based runoff and sediment yield modelling: a case study of the Gumera watershed in the Blue Nile basin

Annual runoff and erosion losses of humus-silicate soil from two specific uses due to precipitation in one part of western Serbia

Combined effect of soil bund with biological soil and water conservation measures in the northwestern Ethiopian highlands

Controlled run-off as method of grassland irrigation and peatland preservation in the Notec River valley

Applicability of the SCS curve number method to tile-drained watersheds

Surface runoff in model field experiment with simulated rainfall and its estimation with CREAMS model

Evaluation of the hydrological role of wetlands in the Wlodawka River catchment (Polesie Lubelskie)

Analysis of the retention capacity of green roofs

Future climate change impacts on the ecohydrology of Guishui River basin, China

Recorded lag times of snowmelt events in a small catchment

Parameters determination of a conceptual rainfall-runoff model for a small catchment in the Carpathians

Effect of surface conditions of runoff and soil loss for chernozem soil

Nutrient losses in runoff and eroded sediments from soils of Central Eastern Nigeria