Wyniki wyszukiwania

1

Examination of the effect of altering model complexity on representing groundwater flow

100%

Jaworska-Szulc B.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr 5

This research evaluated how modifying the conceptual model of a groundwater system affects simulated results. At the first stage, mathematical model of groundwater flow in Gdansk aquifer system was built. In the next stage, 3 analytical schemes resulting from aquifer aggregation were defined. Then the flows and groundwater balances were computed and compared to flows and balances computed in the overall model of the Gdańsk aquifer system.

2

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Constitutive modelling of root-reinforced granular soils - preliminary studies

88%

Switala B., Fern E. J.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2018

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tom 27

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nr 2[80]

3

Sediment transport modifications induced by submerged artificial reef systems: a case study for the Gulf of Venice

88%

Bonaldo D., Benetazzo A., Bergamasco A., Falcieri F. M., Carniel S., Aurighi M., Sclavo M.

Oceanological and Hydrobiological Studies

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2014

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tom 43

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nr 1

4

Some examples of numerical modeling of non-steady liquid flows in simple and branched pipelines

88%

Berman V., Kril S., Bournaski E.

Electronic Journal of Polish Agricultural Universities. Series Civil Engineering

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2020

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tom 23

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nr 4

5

Numerical modeling of textile inspired three-dimensional woven timber structures

88%

Duszyk I., Sitek M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 88

Numerical modeling of textile inspired three-dimensional woven timber structures. The paper presents the numerical analysis of textile inspired three-dimensional woven timber structures. The numerical model built in ABAQUS 6.11 software simulated the possible behaviour of the structures under loading.

6

Opredelenie koehfficienta gotovnosti mashiny pri periodicheskojj rabote i dvukhetapnom processe vosstanovlenija posle otkaza

88%

Shevchenko S.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2016

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tom 18

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nr 5

7

Modélisation numérique spatiale d'écoulement de l'eau souterraine sur le périmètre alimenté par l'infiltration

88%

Krol P.

Annals of Warsaw Agricultural University. Land Reclamation

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2004

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tom 35a

8

The length of the hydraulic jump on the basis of physical and numerical modeling

88%

Urbanski J., Sawicki P., Kiczko A., Koziol A., Krukowski M.

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

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2018

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tom 50

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nr 1

9

Modelling of leaf temperature and transpiration as a function of soil water potential

75%

Olszta W., Wiszniewska-Oraczewska I.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1996

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tom 436

The empirical verification of TRANSP and TERGRA models was the main purpose of conducted researches. The models introduced in this paper describe the diurnal patterns of leaf temperature and transpiration when grass is exposed to increasing water deficit under field conditions. The difference simulation results of leaf water potential, leaf temperature and transpiration flux for low and high soil water potential rates and for different meteorological conditions show that these models need more research and measurements for a better identification of function aqd parameters especially for wet conditions, making these models more useful for irrigation scheduling, using the remote sensing techniques.

10

Feasibility of bacterial technology for treating a polluted urban streams from the perspective of numerical modelling

75%

Yudianto D., Xie Y.-B.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

419-427

With the recent use of bacterial technology for the restoration of a polluted urban stream in China, this paper will show the general feasibility of such biological treatment from the perspective of numerical modelling. Based on the results, a low concentration of BOD₅ can be achieved in shorter distance for higher bacterial concentration applied. Generally greater flow of domestic wastewater will be proportionally balanced by higher bacterial growth. Under limited DO concentration, higher bacterial concentration would also create a breaking point on the declining distribution of BOD₅. The combination of oxygenation and artificial mixing of bacteria would result in lower concentrations of BOD₅ at the downstream.

11

Assessment of the time of transport of pollutants through the poorly permeable layer

75%

Wienclaw E., Ziembikiewicz M.

Annals of Warsaw Agricultural University. Land Reclamation

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2001

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tom 31

33-40

12

Influence of the climatic variations in the wind waves parameters on the alongshore sediment transport

75%

Divinsky B. V., Kosyan R. D.

Oceanologia

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2020

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tom 62

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nr 2

13

Water exchange between the Baltic and the North Sea based on a barotropic model

75%

Kowalik Z., Staskiewicz A.

Oceanologia

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1978

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tom 09

14

Morphologic and hydrodynamic conditions of Hel Peninsula's abrasion in the Kuznica Region [Southern Baltic]

75%

Leczynski L., Chlebus N., Grusza G., Jedrasik J.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr 2

15

Application of a sigma-coordinate baroclinic model to the Baltic Sea

75%

Jankowski A.

Oceanologia

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2002

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tom 44

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nr 1

16

The major Baltic inflow in January 2003 and preconditioning by smaller inflows in summer-autumn 2002: a model study

75%

Meier H. E. M., Doscher R., Broman B., Piechura J.

Oceanologia

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2004

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tom 46

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nr 4

Using the results of the Rossby Centre Ocean model (RCO) the Baltic inflows in summer/autumn 2002 and January 2003 have been studied. The model results were extracted from a long simulation with observed atmospheric forcing starting in May 1980. In RCO a bottom boundary layer model was embedded. Both the smaller inflows and the major inflow in January 2003 are simulated in good agreement with observations. We found that a total of 222 km3 water entered the Baltic in January; the salinity of 94 km3 was greater than 17 PSU. In August/September 2002 the outflow through the Sound and inflow across the Darss Sill were simulated. The net inflow volume amounted to about 50 km3.

17

Wind-induced variability of hydrological parameters in the coastal zone of the Southern Baltic Sea - a numerical study

75%

Jankowski A.

Oceanological Studies

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2000

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tom 29

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nr 3

18

Modelling nitrogen and phosphorus limitation on phytoplankton growth in Narva Bay, South-Eastern Gulf of Finland

75%

Lessin G., Lips I., Raudsepp U.

Oceanologia

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2007

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tom 49

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nr 2

The relative roles of nitrogen and phosphorus in the limitation of phytoplankton growth in Narva Bay, south-eastern Gulf of Finland, were studied by combining the results of numerical modelling and nutrient enrichment experiments.Mo delled biomass-based intracellular nutrient concentrations (nutrient functions) were used to estimate the limiting nutrient in Narva Bay.Nutr ient functions – NF ∈ [0; 1] for nitrogen and PF ∈ [0; 1] for phosphorus – define the dependence of the phytoplankton growth rate on nutrients: NF = PF = 1 corresponds to nonlimitation of phytoplankton growth by nutrients, whereas NF = 0 or PF = 0 to zero growth.T he biotests indicated the response of phytoplankton growth to an increase in nutrient concentration in the surrounding water.Thr ee locations were selected for detailed analyses of temporal variations in the nutrient functions: the offshore station N12, station N8 at the mouth of the River Narva, and coastal station 38.T he biotests were performed at the same stations. NF and PF reached values of 0.9 prior to the spring bloom. With the onset of the spring bloom, NF decreased rapidly and remained below 0.1 in the open part of Narva Bay for the rest of that period.I n the coastal zone, NF was in excess of 0. 1, with a local maximum in the river mouth area. PF decreased to 0.3–0.4 in the open bay after the spring bloom.I n the coastal zone PF remained above 0.4, with a certain increase from the midsummer minimum towards the end of summer.The numerical modelling results clearly show that nitrogen limits phytoplankton growth in Narva Bay.Ph osphorus limitation may occur only for a limited period and over a limited area at the Narva River mouth and other coastal locations.I n general, the biotests backed up the modelling results, the main exception being in the open bay during summer.The model does not account for nitrogen fixation, however.S ince N-fixing cyanobacteria were prevalent in the offshore area, the addition of phosphorus led to enhanced phytoplankton growth at station N12.

19

Partitioning of solar radiation in Arctic sea ice during melt season

63%

Lu P., Cheng B., Lepparanta M., Li Z.

Oceanologia

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2018

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tom 60

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nr 4

20

Dynamic features of successive upwelling events in the Baltic Sea - a numerical case study

63%

Myrberg K., Andrejev O., Lehmann A.

Oceanologia

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2010

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tom 52

|

nr 1

77-99

Coastal upwelling often reveals itself during the thermal stratification season as an abrupt sea surface temperature (SST) drop. Its intensity depends not only on the magnitude of an upwelling-favourable wind impulse but also on the temperature stratification of the water column during the initial stage of the event. When a ‘chain’ of upwelling events is taking place, one event may play a part in forming the initial stratification for the next one; consequently, SST may drop significantly even with a reduced wind impulse. Two upwelling events were simulated on the Polish coast in August 1996 using a three-dimensional, baroclinic prognostic model. The model results proved to be in good agreement with in situ observations and satellite data. Comparison of the simulated upwelling events show that the first one required a wind impulse of 28 000 kg m−1 s−1 to reach its mature, full form, whereas an impulse of only 7500 kg m−1 s−1 was sufficient to bring about a significant drop in SST at the end of the second event. In practical applications like operational modelling, the initial stratification conditions prior to an upwelling event should be described with care in order to be able to simulate the coming event with very good accuracy.

Ograniczanie wyników

Examination of the effect of altering model complexity on representing groundwater flow

Constitutive modelling of root-reinforced granular soils - preliminary studies

Sediment transport modifications induced by submerged artificial reef systems: a case study for the Gulf of Venice

Some examples of numerical modeling of non-steady liquid flows in simple and branched pipelines

Numerical modeling of textile inspired three-dimensional woven timber structures

Opredelenie koehfficienta gotovnosti mashiny pri periodicheskojj rabote i dvukhetapnom processe vosstanovlenija posle otkaza

Modélisation numérique spatiale d'écoulement de l'eau souterraine sur le périmètre alimenté par l'infiltration