Temat: low head hydraulic structures - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Block ramps (BR) made of natural sandstone rapid hydraulic structures (RHS) of Peterka type: stone dimension calculations, a comparative study
Autorzy:: Radecki-Pawlik, A.
Plesiński, K.
Radecki-Pawlik, B.
Czech, W.
Powiązania:: https://bibliotekanauki.pl/articles/101231.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:: block ramp
mountain streams
hydraulic structures
low head hydraulic structures
Opis:: The paper presents results of hydraulic modelling of block ramps (BR) made of natural stones (seven constructional solutions) and compares them with the results of classical research by Peterka. The main aim of the paper is to provide a simplified solution to determining the dimension of stones fixed to the sloping apron of the BR in order to reduce energy of flowing water along the ramp. This new way of assessing the dimensions of stones along BR sloping apron is presented with proposals on how to calculate stone dimension. The paper is dedicated to hydraulics engineers, scientists, designers, practitioners and also to researchers in the field of low-head hydraulic structures.
Źródło:: Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 661-673
1732-5587
Pojawia się w:: Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Using 1D and 2D computer models when predicting hydrodynamic and morphological parameters of a boulder block ramp: Poniczanka stream, Carpathians
Autorzy:: Plesiński, Karol K.
Radecki-Pawlik, Artur
Rivera-Trejo, Fabian
Powiązania:: https://bibliotekanauki.pl/articles/2203562.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: boulder blocks ramps
low head hydraulic structures
field measurement
hydraulics
riverbed morphology
HEC-RAS model
CCHE2D model
Opis:: When modelling flow and/or sediment transport in streams and rivers, one must frequently use the computer software of differing levels of complexity. The level of sophistication, accuracy, and quality of results are the parameters by which models can be classified as being 1D, 2D, or 3D; it seems certain that in the future, there will also be 4D and 5D models. However, the results obtained from very sophisticated models are frequently questionable, and designers in the field of hydraulic structures must have considerable experience distinguishing important information from irrelevant information. Thus, this paper aims to investigate the effect of the selected boulder block ramp hydraulic structure at Poniczanka stream on the bed-load transport. We evaluated sediment transport using the CCHE2D numerical model. We analysed several scenarios depending on the river bed type (erodible, non-erodible, rocky) and examined the rock blocks used for hydraulic structure construction. The obtained results were compared with the Hjulström and the Shields graph, which are a classic approach for identifying fluvial processes in river channels. In addition to these two methods, numerical modelling using the 1D HEC-RAS (Hydrologic Engineering Center’s River Analysis System) modelling were conducted, which included the determination of horizontal and vertical changes to the river bed morphology of the examined section of river reach as well as providing the basic hydrodynamics parameters which, from the practical point of view, designers involved in the process of designing ramps could use.
Źródło:: Journal of Water and Land Development; 2022, Special Issue; 34--48
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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