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Tytuł:
Hydrochemical flood flow of the Vistula -august 2001
Autorzy:
Dubrawski, R.
Afanas, B.
Dembska, G.
Powiązania:
https://bibliotekanauki.pl/articles/972857.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
flood flow
Gulf of Gdańsk
Vistula
Opis:
Intense rain in the south em part of the Vistula 's watershed in Ju(v 2001 resulted in floods in many places and in flood water flows on the Vistula and its tributaries. The culmination of the flood reached the Gulf of Gdańsk in the night of 5th August 2001. In the period 4th to 6th August, 10 samples of water were taken, and d1e content of biogenic substances and of other components in these samples was determined. Basing on water flow measurements and on the content of the investigated components, the loads were calculated and compared with mean multi-annual loads for the pen·od 1984- 1998. It was found that the mean biogen load, related to water flow, was exceeded many times. Also the relationships between the analysed components, water flow and variability during the period of investigations were detennined. Obtained results show that there may be a very significant influence of biogens on the condition of the environment and on the dynamics of biocenotic processes of the Gulf of Gdańsk in the period before and after the propagation of flood waters of the Vistula.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 119-130
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrochemical flood flow of the Vistula -august 2001
Autorzy:
Dubrawski, R.
Afanas, B.
Dembska, G.
Powiązania:
https://bibliotekanauki.pl/articles/1920611.pdf
Data publikacji:
2001
Wydawca:
Instytut Morski w Gdańsku
Tematy:
flood flow
Gulf of Gdańsk
Vistula
Opis:
Intense rain in the south em part of the Vistula 's watershed in Ju(v 2001 resulted in floods in many places and in flood water flows on the Vistula and its tributaries. The culmination of the flood reached the Gulf of Gdańsk in the night of 5th August 2001. In the period 4th to 6th August, 10 samples of water were taken, and d1e content of biogenic substances and of other components in these samples was determined. Basing on water flow measurements and on the content of the investigated components, the loads were calculated and compared with mean multi-annual loads for the pen·od 1984- 1998. It was found that the mean biogen load, related to water flow, was exceeded many times. Also the relationships between the analysed components, water flow and variability during the period of investigations were detennined. Obtained results show that there may be a very significant influence of biogens on the condition of the environment and on the dynamics of biocenotic processes of the Gulf of Gdańsk in the period before and after the propagation of flood waters of the Vistula.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2001, 28, 2; 119-130
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of bedload transport rate during flood flows in the Zagozdzonka River
Zmiennosc natezenia ruchu rumowiska wleczonego w czasie wezbran w rzece Zagozdzonce
Autorzy:
Popek, Z
Powiązania:
https://bibliotekanauki.pl/articles/81529.pdf
Data publikacji:
2010
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
variability
bed load
transport
flood flow
Zagozdzonka River
lowland river
small river
Opis:
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.
W pracy przedstawiono wyniki pomiarów transportu rumowiska wleczonego w czasie siedmiu wezbrań obserwowanych w rzece Zagożdżonce. Do pomiaru wleczenia wykorzystano łapacz rumowiska wyposażony w aparaturę do ciągłego pomiaru i automatycznej rejestracji masy zatrzymanego w nim rumowiska. Na podstawie parametrów hydraulicznych zarejestrowanych podczas przepływu jednej z analizowanych fal wezbraniowych obliczono wartości chwilowe jednostkowego natężenia ruchu rumowiska wleczonego. W obliczeniach wykorzystano formułę Bagnolda, przy czym naprężenia graniczne określono według formuły autora, ustalonej na podstawie badań laboratoryjnych. Zmierzone chwilowe wartości natężenia wleczenia oraz całkowitą masę rumowiska wleczonego porównano z wartościami obliczonymi.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 69-77
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probable annual floods in a small lowland river estimated with the use of various sets of data
Powodzie prawdopodobne w malej rzece nizinnej okreslone przy wykorzystaniu roznych zbiorow danych
Autorzy:
Banasik, K.
Byczkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/81795.pdf
Data publikacji:
2007
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
flood
small catchment
catchment
design flood
annual flood
lowland river
river
small river
data set
probable flood flow
hydrology
Opis:
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.
Na podstawie 40-letniego ciągu przepływów dobowych zarejestrowanych w profi lu Płachty Stare na Zagożdżonce (A = 82,4 km2) utworzono zbiory danych do analizy częstotliwości przepływów powodziowych. Po statystycznej analizie jednorodności rocznych przepływów maksymalnych utworzono dwa zbiory AM1 i AM2 (annual maxima), odpowiednio 34- i 40-elementowe, różniące się poziomem zgodności jednego z testów stacjonarności ciągów. Trzeci zbiór danych utworzono ze wszystkich wezbrań okresu 40-letniego, nie mniejszych niż NWQ. Obliczenia wykonano stosując do zbiorów AM1 i AM2 program komputerowy IMGW, identyfi kujący dla obydwu zbiorów rozkład logarytmiczno-normalny (spośród czterech) jako najbardziej zgodny z danymi pomiarowymi. Analizę trzeciego zbioru danych (zawierajacych 261 przepływów) przeprowadzono przy wykorzystaniu arkusza kalkulacyjnego. Na podstawie wyników obliczeń stwierdzono znikome różnice w wartościach przepływów maksymalnych prawdopodobnych przy wykorzystaniu zbiorów AM1 i AM2 oraz znaczne różnice w porównaniu z wartościami uzyskanymi przy wykorzystaniu trzeciego zbioru danych.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2007, 38; 3-10
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flow roughness evaluation of mobile-bed streams
Autorzy:
Matousek, V.
Powiązania:
https://bibliotekanauki.pl/articles/62556.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
Czech Republic
bed load
sediment transport
flood flow
slurry pipe
upper plane bed
stream
field measurement
bed roughness
flood condition
hydraulic roughness
Opis:
Recent field measurements of mobile-bed roughness in selected streams in Czech Republic are described. The results are collected in a database organized to a www catalogue. The field results of the bed roughness in two gravel-bed streams under flash flood conditions are discussed. A methodology is suggested for evaluation of the bed roughness of straight channels transporting sediments. A prediction of the bed roughness under the condition of intense sediment transport in the upper plane bed regime is demonstrated on the results of laboratory pressurized-pipe tests. An application to flood conditions in a steep mountain creek is shown in a case study.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2010, 11
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Curve Flow-duration-Frequency. The flood modelling regime of the Wadi Mazafran catchment in the north of Algeria
Autorzy:
Kourat, Sofiane
Touaibia, Bénina
Yahiaoui, Abdelhalim
Powiązania:
https://bibliotekanauki.pl/articles/2174334.pdf
Data publikacji:
2022
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
duration
flood
flood regime
flow
Flow-duration-Frequency modelling
QdF modelling
frequency
Mazafran
Opis:
Synthetic modelling of the flood regime is based on the overall knowledge of the hydrological regime in a catchment. The Flow-duration-Frequency (QdF) modelling is used to combine three parameters characterising flood with its mean or exceeded flow, its characteristic duration, and occurrence frequency. Which of these can be established locally at the extreme mean volume flow rates of a catchment reference hydrometric station? The determination of the reference QdF model in mean (volume) and exceeded flows requires two characteristics reflecting the flood regime in a catchment. The first is the characteristic flood duration and the second is the 10-year quantile of the annual maximum instantaneous flow. The comparison of the local situation to the reference QdF models enables to develop the final QdF model of the catchment and therefore the baseline QdF for exceeded and synthetic mono-frequency hydrographs. These are essential components in the study of flood risk mapping and the estimation of the instantaneous peak distribution from mean daily streamflow series.
Źródło:
Journal of Water and Land Development; 2022, 54; 121--130
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-damaging flow below the Mietków reservoir on the Bystrzyca river
Autorzy:
Kosierb, R.
Powiązania:
https://bibliotekanauki.pl/articles/108576.pdf
Data publikacji:
2013
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
reservoirs
non-damaging flow
flood
Opis:
Non-damaging flow below storage reservoirs is one of the key factors which affect proper water management, especially the protection of valleys against flooding. Following analysis of river flow capacities below reservoirs it should be noted that, over the years, these capacities are subject to significant limitations. This is usually caused by inappropriate floodplain management. Buildings are often built closer to the river channels, which in consequence causes flooding of the buildings at low flood discharges. Repeated inundations and thus increasing losses oblige the local authorities to maintain low outflows from reservoirs in the first phase of the freshet, which leads to a rapid fulfillment of flood reserves of the reservoirs. Then, the culmination of flood wave often takes place when the reservoirs are filled and consequently high discharges from the reservoirs must be realized. This causes flooding of the areas and buildings below the storage reservoirs. This situation could have been avoided if the riverbeds and floodplains had been adjusted to pass non-damaging flow and adopted it as the basis for the water management of a given reservoir. A significant improvement in reduced reservoir capacities will occur if the values of non-damaging flow below the reservoirs are increased and the losses caused by flood flow are significantly reduced by appropriate spatial development of the areas below the storage reservoirs. The current non-damaging flow below the Mietków reservoir is a striking example of the issue. Three farms located within the floodplain of the Bystrzyca river have an adverse impact on water management of the reservoir when floods take place.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2013, 1, 1; 9-14
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protection of settlements from floods and debris flow on the example of tragedy in Tbilisi on 13-14 June of 2015
Autorzy:
Diakonidze, R.
Supatashvili, T.
Diakonidze, B.
Ioseliani, L.
Getiashvili, A.
Laoshvili, Z.
Powiązania:
https://bibliotekanauki.pl/articles/108546.pdf
Data publikacji:
2017
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
disaster
flood
water discharge
debris flow
landslide
Opis:
This article presents material about the flood on the Vere River on 13-14 June, 2015. It caused significant economic and ecological damage to the country, and there were also human victims. The reasons for the ecological disaster are evaluated and appropriate hydrological calculations have been carried out. It has been particularly established that the predictable (forecasting) maximal discharges of 0,1% value for Vere River is 520 m3/sec and not 410 m3/sec, that was calculated water conduct tunnels in the entrance of city before the Mtkvari River. The flood on the 13-14 June 2015 and the connected tragedy was caused by high intensive precipitation in the catchment basin, the activation of geodynamic processes, and also anthropogenic factors. In our opinion, a reason of disaster also was a design flaw in hydrotechnical buildings (tunnels) – they are not able to manage a water flow rate of 0,1% assurance. The paper presents the recommendations necessary for us to avoid, or at least reduce, the ecological and economic problems caused by floods and debris flow. The presented recommendations against a disaster like that which affected Tbilisi, as well as the expected environmental problems on territory with similar natural conditions, will enable us to avoid or reduce damage caused by flood and debris flow.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2017, 5, 2; 31-34
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of flood event in a reach of the Nile River using CCHE2D model
Autorzy:
Khan, A. A.
Wang, S. S. Y.
Powiązania:
https://bibliotekanauki.pl/articles/240958.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
river flow simulation
flood stage
stage-discharge relationship
Opis:
The impact of design flood in terms of water surface level and maximum velocity in a reach on the Nile River is studied, using a depth-averaged two-dimensional model. The reach includes a proposed site for a shipyard maintenance harbour. The CCHE2D model, a depth-averaged two-dimensional model, is selected to perform both the steady state computation, for calibration purposes, and flood routing through the reach to obtain maximum water surface level and velocity information. Manning's coefficient was obtained by matching the computed and measured water surface level in the reach under steady flow conditions. The computed results of velocity and water surface profiles agreed satisfactorily with the measured data. The verified model was then used to simulate a flood event within the same reach. Stage-discharge relationships for various sections within the reach were obtained. The peak water surface level at each section was compared with the flow stage under normal flow conditions. The peak stage was found to be well below the proposed elevation of the construction site. The estimation of the peak velocity and water surface level might be useful for bank protection work.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2003, 50, 4; 329-341
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The flood extent in the lower Biebrza basin calculated by the 1D flow model for different land use scenarios
Zastosowanie jednowymiarowego modelu hydrodynamicznego do wyznaczania zasięgu zalewu w Basenie Dolnym Biebrzy przy różnym sposobie użytkowania
Autorzy:
Szporak, S.
Miroslaw-Swiatek, D.
Chormanski, J.
Powiązania:
https://bibliotekanauki.pl/articles/81559.pdf
Data publikacji:
2008
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
flood extent
Biebrza basin
1D flow model
land use
water condition
flood plain
vegetation succession
river flow model
Biebrza River
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2008, 40
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 27

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