Zobrazeno 1 - 10
of 861
pro vyhledávání: '"Bed Roughness"'
Publikováno v:
محیط زیست و مهندسی آب, Vol 10, Iss 4, Pp 525-540 (2024)
The contrast in bed roughness versus apron roughness has, until recently, received insufficient attention, despite its significant role in causing downstream scouring. In this study, a validated numerical model has employed to investigate the impact
Externí odkaz:
https://doaj.org/article/99b38453f4dc4e7988215cd6f855da59
Autor:
Kirti Singh, Kesheo Prasad
Publikováno v:
Journal of Engineering and Applied Science, Vol 71, Iss 1, Pp 1-29 (2024)
Abstract The objective of the study is to use a 3D Acoustic Doppler Velocimeter (ADV) to gauge the typical flow and turbulence characteristics within a non-uniform open channel. The findings of experimental examinations of the subcritical flow along
Externí odkaz:
https://doaj.org/article/d8bf95c672724ce886b9f96c80f6d39d
Autor:
Ahmed Y. Mohammed, Parveen Sihag
Publikováno v:
Journal of Hydroinformatics, Vol 26, Iss 3, Pp 626-640 (2024)
This study uses machine learning (ML) to predict the end-depth structure's discharge and critical depth (yc). Linear regression, M5P, random forest, random tree, reduced error pruning tree, and Gaussian process (GP) are the ML methods used in this in
Externí odkaz:
https://doaj.org/article/643b2be33fde46ceb202e498e4537532
Publikováno v:
Heliyon, Vol 10, Iss 11, Pp e32162- (2024)
The primary purpose of this study was to evaluate the hydraulic coefficient of coarse aggregate grain size beds and hydraulic parameters under random and perpendicular bed configurations, as well as to explore the discharge coefficient for rectangula
Externí odkaz:
https://doaj.org/article/5df8105ec8c64505995120cc0f190244
Autor:
Jan Hitzegrad, Leon Brohmann, Friedrich Herding, Kai Pfennings, Sven Jonischkies, Elisa Scharnbeck, Jeldrik Mainka, Inka Mai, Christian Windt, Harald Kloft, Achim Wehrmann, Dirk Lowke, Nils Goseberg
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
Coastal biogenic structures, formed by ecosystem engineering species, often feature rough surfaces characterized by intricate topographies and highly three-dimensional reliefs. Their surfaces are shaped by waves and tidal currents and reciprocally in
Externí odkaz:
https://doaj.org/article/5829ed81887c45dfa7ec05f1d8ddb243
Publikováno v:
Oceanologia, Vol 64, Iss 1, Pp 212-226 (2022)
Results of bathymetric surveys conducted to examine changes of sand dunes geometry in the Vistula River mouth before, during and after the extreme flood event are presented. A total of 2076 dunes were analysed based on a series of bed elevation profi
Externí odkaz:
https://doaj.org/article/756224e16e99497e936cd2c410e0adea
Publikováno v:
Water Supply, Vol 22, Iss 1, Pp 251-263 (2022)
The effects of bed roughness on the longitudinal dispersion coefficient (DL) were experimentally and numerically investigated in the present study. The tracer experiments were first carried out in a circular flume with a diameter of 1.6 m over both s
Externí odkaz:
https://doaj.org/article/a3139e23fccd4901aa6d80954b898c85
Publikováno v:
Cogent Engineering, Vol 9, Iss 1 (2022)
The drag coefficient of a one-line circular patch of emergent sparse vegetation in an open-channel flow or riverbeds with varying bed roughness sizes was experimentally investigated. The total roughness of the channel was accounted for using the rate
Externí odkaz:
https://doaj.org/article/339590c843a04443bf8ba721efb0bf55
Autor:
Umut Türker, Manousos Valyrakis
Publikováno v:
Water Supply, Vol 21, Iss 4, Pp 1423-1437 (2021)
The aim of this study was to assess and quantify the effect of channel bed roughness on hydraulic jumps based on sound physical theories. Assuming that integrated bed shear stress due to surface roughness changes linearly with supercritical velocity,
Externí odkaz:
https://doaj.org/article/c155c34cdff74a9da24c68da12c5ce27
Autor:
Jan Hitzegrad, Leon Brohmann, Kai Pfennings, Tom K. Hoffmann, Anne K. Eilrich, Maike Paul, Mario Welzel, Torsten Schlurmann, Jochen Aberle, Achim Wehrmann, Nils Goseberg
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
The Pacific oyster (Magallana gigas) is an invasive species in the Wadden Sea transforming parts of it permanently. M. gigas, as an ecosystem engineer, builds reef structures that are characterized by highly complex and variable surfaces consisting o
Externí odkaz:
https://doaj.org/article/9cd929b7761f47fcaca4ec247281bf5c