scholarly journals Charophytes (Charophyta) in the Zasavica special nature reserve

2011 ◽  
Vol 63 (3) ◽  
pp. 883-888 ◽  
Author(s):  
Aleksandra Vesic ◽  
Jelena Blazencic ◽  
M. Stankovic
Keyword(s):  
Shallow Water ◽  
Nature Reserve ◽  
Taxonomic Diversity ◽  
Alkaline Ph ◽  
Riparian Areas ◽  
Ecological Characteristic ◽  
Ephemeral Ponds ◽  
Water Flows ◽  
Chara Globularis

Floristic and taxonomic diversity, as well as studies of ecological characteristic of Charophyta algae were carried out within the complex biodiversity researches, in the Zasavica Special Nature Reserve. Nine species were recorded: Chara globularis, C. contraria, C. vulgaris, Nitella mucronata, N. capillaris, N. syncarpa, N. confervacea, Tolypella intricata and T. prolifera. The most common charophyte habitats are shallow, often ephemeral, ponds and puddles in diluvial forests and marshy meadow depressions. Charophytes were also found in riparian areas of water flows, springs and channels, in shallow water (0.1 to 1.2 m), neutral to alkaline (pH 7.4-8.8), and on different substrates (silt, peat, bogland mold).

2D Numerical Simulations for Shallow-water Flows over a Side Weir

2015 ◽  
Vol 48 (11) ◽  
pp. 957-967
Author(s):  
Seung-Yong Hwang
Keyword(s):  
Numerical Simulations ◽  
Shallow Water ◽  
Side Weir ◽  
Water Flows ◽  
Shallow Water Flows

scholarly journals Dispersive and hyperbolic models for non-hydrostatic shallow water flows and their application to steep forced waves modelling

2020 ◽  
Vol 1666 ◽  
pp. 012064
Author(s):  
A V Chebotnikov ◽  
A A Chesnokov ◽  
A K Khe ◽  
V Yu Liapidevskii
Keyword(s):  
Shallow Water ◽  
Water Flows ◽  
Shallow Water Flows ◽  
Forced Waves

Assessing the Numerical Accuracy of Complex Spherical Shallow-Water Flows

2007 ◽  
Vol 135 (11) ◽  
pp. 3876-3894 ◽  
Author(s):  
Ali R. Mohebalhojeh ◽  
David G. Dritschel
Keyword(s):  
Shallow Water ◽  
Fourth Order ◽  
Large Scale ◽  
Numerical Accuracy ◽  
Conservation Of Energy ◽  
Water Flows ◽  
Shallow Water Flows ◽  
Low Froude Number ◽  
Contour Advection ◽  
High Reynolds

Abstract The representation of nonlinear shallow-water flows poses severe challenges for numerical modeling. The use of contour advection with contour surgery for potential vorticity (PV) within the contour-advective semi-Lagrangian (CASL) algorithm makes it possible to handle near-discontinuous distributions of PV with an accuracy beyond what is accessible to conventional algorithms used in numerical weather and climate prediction. The emergence of complex distributions of the materially conserved quantity PV, in the absence of forcing and dissipation, results from large-scale shearing and deformation and is a common feature of high Reynolds number flows in the atmosphere and oceans away from boundary layers. The near-discontinuous PV in CASL sets a limit on the actual numerical accuracy of the Eulerian, grid-based part of CASL. For the spherical shallow-water equations, the limit is studied by comparing the accuracy of CASL algorithms with second-order-centered, fourth-order-compact, and sixth-order-supercompact finite differencing in latitude in conjunction with a spectral treatment in longitude. The comparison is carried out on an unstable midlatitude jet at order one Rossby number and low Froude number that evolves into complex vortical structures with sharp gradients of PV. Quantitative measures of global conservation of energy and angular momentum, and of imbalance as diagnosed using PV inversion by means of Bolin–Charney balance, indicate that fourth-order differencing attains the highest numerical accuracy achievable for such nonlinear, advectively dominated flows.

scholarly journals A positivity preserving central scheme for shallow water flows in channels with wet-dry states

2014 ◽  
Vol 48 (3) ◽  
pp. 665-696 ◽  
Author(s):  
Jorge Balbás ◽  
Gerardo Hernandez-Duenas
Keyword(s):  
Shallow Water ◽  
Positivity Preserving ◽  
Water Flows ◽  
Shallow Water Flows ◽  
Central Scheme

scholarly journals Formation and coarsening of roll-waves in shear shallow water flows down an inclined rectangular channel

2017 ◽  
Vol 159 ◽  
pp. 189-203 ◽  
Author(s):  
K.A. Ivanova ◽  
S.L. Gavrilyuk ◽  
B. Nkonga ◽  
G.L. Richard
Keyword(s):  
Shallow Water ◽  
Rectangular Channel ◽  
Water Flows ◽  
Roll Waves ◽  
Shallow Water Flows

Simulation of resonant gravity waves in shallow water flows using a depth-averaged URANS model

2020 ◽  
pp. 1097-1103
Author(s):  
A. Navas-Montilla ◽  
C. Juez ◽  
M.J. Franca ◽  
J. Murillo
Keyword(s):  
Shallow Water ◽  
Gravity Waves ◽  
Water Flows ◽  
Shallow Water Flows

Unstructured spectral/hp element methods for shallow water flows

Shallow Flows ◽  
2004 ◽  
pp. 593-600
Author(s):  
Lars Bergdahl ◽  
Claes Eskilsson ◽  
Spencer Sherwin
Keyword(s):  
Shallow Water ◽  
Water Flows ◽  
Shallow Water Flows
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