نتایج جستجو برای: meander and deeping rivers beds
تعداد نتایج: 16832169 فیلتر نتایج به سال:
Most of researches related to hydraulic jump have been done on horizontal and rough beds, and little attempt has been made on rough beds with adverse slopes. The aim of this study was to investigate the influence of rough beds with adverse slope on hydraulic jump characteristics. The variations of energy loss in stilling basins with three adverse slopes and three different roughnesses were stud...
Introduction: The equity distribution of health services is a major aim of all countries. Because, The present study was aimed to explore the manpower distribution of specialist physicians and nurses by population, and its relationship with the number of beds at public hospitals in Iran’s from 2000 to 2005. Methods: This is a descriptive- analytical, retrospective study. The data are analyzed u...
In this paper, we developed a mathematical model for the sedimentation process of small particles in lid-driven cavity flow with an obstacle to transport microplastic rivers. A stationary incompressible Navier-Stokes simulation at moderate Reynolds-numbers provides background field. Spherical are injected into field and their equation motion is solved determine number that sediment on surface o...
This paper uses the results of river suspended sediment flux (SSF) analysis to propose a new hydrological method for quantitatively estimating the river bed and drainage basin (sheet erosion, rill and gully erosion) components of total erosion intensity in river basins. The suggested method is based on the establishment of the functional power connection between mean monthly water discharges (W...
Background: One of the important aspects of equity in health is equality in the distribution of resources in this sector. The present study aimed to assess the distribution of hospital beds in Shiraz in 2014. Methods: In this retrospective cross-sectional study, the population density index and fair distribution of beds were analyzed by Lorenz curve and Gini coefficient, respectively....
rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. scour downstream of this structure can lead to failure. over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...
Paraschistur anielseni is one of the main species of Paraschistura genus that is distributed in freshwater rivers which drain into the Persian Gulf. There has not been any study on genetic diversity of this species yet. In this investigation, 90 samples were collected from the rivers Shapour, Dalaki (Fars province) and Mand (Bushehr province) (30 samples per river) to investigate their populati...
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