Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "river continuum" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Small Water Reservoirs – Sources of Water or Problems?
Autorzy:
Jurik, L.
Húska, D.
Halászová, K.
Bandlerová, A.
Powiązania:
https://bibliotekanauki.pl/articles/123493.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water reservoirs
hydrological conditions
Water Framework Directive
river continuum
operation and maintenance
Opis:
The design of small water reservoirs in Slovakia and neighbouring countries has common origins in the middle of the last century. Most of them were an alternative source of water for irrigation of field crops. Nowadays, we have to face new problems, such as the problems with the design of hydrological data and real current discharges, the problems with original and new design of the flood wave for the solution of the safety overflow. All of Q100 flows recorded nowadays are much higher than those which had been designed and built. The safety overflows no longer answer the purpose of the contemporary flows. The problems with the Framework Directive are also important – small water reservoirs are not resolved in the Directive as the water bodies of stagnant water because they have an area of less than 0.5 km2. The same problem is also with the preservation of continuity of the flow and the fact that they should let the fish pass. Unfortunately, the state, administrators of small dams, operators and nature conservationists have different points of view on the above-mentioned problems. The article elaborates these problems and suggests possible solutions to the problems.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 22-28
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Bridges on the Process of Water Turbidity on the Example of Large Lowland Rivers
Autorzy:
Szatten, Dawid
Habel, Michał
Babiński, Zygmunt
Obodovskyi, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/125164.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water turbidity
bridge
lower Vistula river
Sukhona river
suspended sediment continuum
contraction scour
Opis:
The transformations of river channels as a result of human activity may reflect the level of anthropogenic pressure. Recorded in macroscale, they are indicators of transformations for the larger part of the river basin, while in the microscale they usually refer to its fragment. The human activity that has the strongest influence on the fluvial processes, including suspended sediment transport, is the interference in the riverbed, such as hydrotechnical construction (create of water stages) or transformation of the river banks (concreting of the river banks). The aim of the research was to determine the impact of bridges on the process of water turbidity in the longitudinal profile of large lowland rivers. The research area was the lower reach of Vistula – bridge profiles: Torun, Bydgoszcz, Kiezmark (Poland) and bridge profile on Sukhona – a tributary of the Northern Dvina River near the city of Veliky Ustyug (Russia – Arkhangelsk Oblast). The research conducted in the years 2013–2017 included the measurements of water turbidity in the cross-sections of the above-mentioned rivers. The determinations of water turbidity were carried out using traditional (granulometry analysis) and nephelometric methods (devices: LISST-25X and turbidimeter). The impact of bridges on the variability of water turbidity was determined. The obtained results were related to the variability of depth conditions (bathymetric measurements) and hydrodynamics in the cross-section profile of the channel.
Źródło:
Journal of Ecological Engineering; 2019, 20, 10; 155-164
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies