Results 21 to 30 of about 39,296 (293)

Location and Species Matters: Variable Influence of the Environment on the Gene Flow of Imperiled, Native and Invasive Cottontails

open access: yesFrontiers in Genetics, 2021
The environment plays an important role in the movement of individuals and their associated genes among populations, which facilitates gene flow. Gene flow can help maintain the genetic diversity both within and between populations and counter the ...
Thomas J. McGreevy   +6 more
doaj   +1 more source

Analysis of the water surface profiles of spatially varied flow with increasing discharge using the method of singular points

open access: yes, 2021
Spatially varied flows with increasing discharge can be encountered in several hydraulic systems. The analysis of water surface profiles in such flow conditions is useful for the verification and design of these systems.
Maranzoni A.
core   +1 more source

A sediment transport theory based on distortion-free-boundary nonhomogeneous fluid flows

open access: yesApplications in Engineering Science, 2023
Over the last 50 years several sediment transport models in coastal environments based on Shallow Water(SW) type models have been developed in the literature.
Arno Roland Ndengna Ngatcha   +1 more
doaj   +1 more source

A Modified Perturbation Solution Procedure for Spatially-Varied Flows [PDF]

open access: yesCanadian Water Resources Journal, 2001
An improved perturbation solution procedure for solving the non-linear differential equation governing spatially-varied flows (SVF) in open channels is described. The procedure corrects for the non-uniformity in the cross-stream distribution of streamwise velocity that is characteristic of this type of flow.
S. Kouchakzadeh   +2 more
openaire   +1 more source

Turbulence structure of non-uniform rough open channel flow

open access: yesE3S Web of Conferences, 2018
This paper focuses on the turbulence structure in a non-uniform, gradually varied, sub-critical open channel flow (OCF) on a rough bed. The flow field is analysed under accelerating, near-uniform and decelerating conditions.
Williams Priscilla   +2 more
doaj   +1 more source

Spatial and temporal variability of saturated areas during rainfall-runoff events

open access: yesJournal of Hydrology and Hydromechanics, 2023
Spatially distributed hydrological model Mike SHE was used as a diagnostic tool to provide information on possible overland flow source areas in the mountain catchment of Jalovecký Creek (area 22.2 km2, elevation range 820–2178 m a.s.l.) during different
Sleziak Patrik   +4 more
doaj   +1 more source

Modeling Seepage Flow and Spatial Variability of Soil Thermal Conductivity during Artificial Ground Freezing for Tunnel Excavation

open access: yesApplied Sciences, 2021
Artificial ground freezing (AGF) technology has been commonly applied in tunnel construction. Its primary goal is to create a frozen wall around the tunnel profile as a hydraulic barrier and temporary support, but it is inevitably affected by two natural
Pu Qiu, Peitao Li, Jun Hu, Yong Liu
doaj   +1 more source

Boundary shear stress in spatially varied flow with increasing discharge

open access: yes, 2005
The distribution of the wall shear stress on the bed and sidewalls of an open channel receiving lateral inflow was obtained from experimental measurements of the distribution of the velocity in the viscous sublayer using a laser doppler velocimeter.
Muttucumaru Sivakumar (19588786)   +3 more
core   +2 more sources

Spatially heterogeneous environmental selection strengthens evolution of reproductively isolated populations in a Dobzhansky-Muller system of hybrid incompatability.

open access: yesFrontiers in Genetics, 2016
Within-species hybrid incompatibility can arise when combinations of alleles at more than one locus have low fitness but where possession of one of those alleles has little or no fitness consequence for the carriers.
Samuel A Cushman, Erin L Landguth
doaj   +1 more source

Effect of microchannel aspect ratio on residence time distributions and the axial dispersion coefficient [PDF]

open access: yes, 2009
The effect of microchannel aspect ratio (channel depth/channel width) on residence time distributions and the axial dispersion coefficient have been investigated for Newtonian and shear thinning non-Newtonian flow using computational fluid dynamics.
Prat, Laurent E.   +4 more
core   +1 more source

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