Spatial Distribution of Dissolved Oxygen at Rapid Hydraulic Structures as an Indicator of Local-Scale Processes

2018 ◽  
pp. 377-387
Author(s):  
Agnieszka Rajwa-Kuligiewicz ◽  
Karol Plesiński ◽  
J. Russell Manson ◽  
Artur Radecki-Pawlik ◽  
Paweł M. Rowiński
Keyword(s):  
Spatial Distribution ◽  
Dissolved Oxygen ◽  
Local Scale ◽  
Hydraulic Structures

scholarly journals Properties of cores of the water masses in the Okhotsk Sea

2016 ◽  
Vol 184 (1) ◽  
pp. 204-218
Author(s):  
Vladimir A. Luchin ◽  
Andrey A. Kruts
Keyword(s):  
Spatial Distribution ◽  
Dissolved Oxygen ◽  
Oxygen Content ◽  
Sea Water ◽  
Water Masses ◽  
Okhotsk Sea ◽  
Data Set ◽  
Water Properties ◽  
Oceanographic Data

Spatial distribution of depth and water properties (temperature, salinity, dissolved oxygen content) are considered in detail for cores of the Okhotsk Sea water masses: subsurface, intermediate, and deep, on the base of the most comprehensive oceanographic data set.

scholarly journals MODELO MATEMÁTICO DEL ECOSISTEMA DE LA CIÉNAGA GRANDE DE SANTA MARTA

2016 ◽  
Vol 32 ◽  
Author(s):  
Yuri S. Tuchkovenko ◽  
Luis Alfredo Calero
Keyword(s):  
Mathematical Model ◽  
Organic Matter ◽  
Spatial Distribution ◽  
Dissolved Oxygen ◽  
Coastal Lagoon ◽  
Two Dimensional ◽  
Balance Equations ◽  
Dead Organic Matter ◽  
Shallow Reservoir ◽  
Nitrite Nitrate

The structure of the chemical – biological block of two-dimensional mathematical model of ecosystem and shallow reservoir and his methods of calibration is described in detail. The model includes the balance equations for the following components of ecosystem: phytoplankton, bacteria, zooplankton, dead (organic) matter, phosphate, ammonium, nitrite, nitrate and dissolved oxygen. Results of calculations of spatial distribution of several components of the ecosystem for the Ciénaga Grande de Santa Marta coastal lagoon (Colombia) in various seasons of year are given.

Aeration Performance of Triangular Notch Weirs at Recirculating System

2001 ◽  
Vol 36 (1) ◽  
pp. 121-132 ◽  
Author(s):  
Ahmet Baylar ◽  
Tamer Bagatur ◽  
Ahmet Tuna
Keyword(s):  
Dissolved Oxygen ◽  
Aquatic Organisms ◽  
The Other ◽  
Hydraulic Structures ◽  
Air Bubbles ◽  
Adequate Supply ◽  
Oxygen Levels ◽  
Aeration Efficiency ◽  
Aeration Performance ◽  
Better Than

Abstract An adequate supply of dissolved oxygen is essential for the survival of aquatic organisms. Hydraulic structures can increase dissolved oxygen levels by creating turbulent conditions, where small air bubbles are carried into the bulk of the flow. Plunging overfall jets from weirs at recirculating systems are a particular instance of this. This paper seeks triangular notch weirs having different weir angle (α) and how they affect the aeration performance. It is demonstrated that the aeration efficiency of a 90° triangular notch weir is generally better than that of the other weirs.

Modelling the spatial distribution ofCulicoidesbiting midges at the local scale

2012 ◽  
Vol 50 (1) ◽  
pp. 232-242 ◽  
Author(s):  
Georgette Kluiters ◽  
David Sugden ◽  
Helene Guis ◽  
K. Marie McIntyre ◽  
Karien Labuschagne ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Local Scale

scholarly journals Copepods of the genus Oithona from Cananéia region (Lat. 25º07'S, Long. 47º56' W)

1979 ◽  
Vol 28 (2) ◽  
pp. 01-16 ◽  
Author(s):  
Vera Lúcia Fonseca ◽  
Maria Scintila de Almeida Prado
Keyword(s):  
Spatial Distribution ◽  
Seasonal Variation ◽  
Dissolved Oxygen ◽  
Congeneric Species ◽  
Ecological Aspects ◽  
Work Done ◽  
First Time ◽  
Estuarine Region

Some ecological aspects of two congeneric species of Cyclopoid copepods, Oithona ovalis and O. oligohalina have been studied for the first time in the estuarine region of Cananeia. The spatial distribution and seasonal variation of both species of Oithona are studied in relation to salinity, temperature and dissolved, oxygen. The results obtained are compared to previous work done in the area and to similar studies undertaken elsewhere.

Spatial distribution ofVespa velutinaindividuals hunting at domestic honeybee hives: heterogeneity at a local scale

2014 ◽  
Vol 21 (6) ◽  
pp. 765-774 ◽  
Author(s):  
Karine Monceau ◽  
Olivier Bonnard ◽  
Jérôme Moreau ◽  
Denis Thiéry
Keyword(s):  
Spatial Distribution ◽  
Local Scale

scholarly journals Efficiency and Equity in the Spatial Planning of Primary Schools

2021 ◽  
Vol 10 (1) ◽  
pp. 21-38
Author(s):  
Jan Wolf ◽  
Fillipe Feitosa ◽  
João Lourenço Marques
Keyword(s):  
Linear Programming ◽  
Spatial Distribution ◽  
Primary Schools ◽  
Spatial Planning ◽  
Public Services ◽  
School Facilities ◽  
Local Scale ◽  
Programming Approach ◽  
School Planning ◽  
Per Capita

The shrinking populations of many regions in Portugal have led to a debate on the criteria which should guide the restructuring of public services at the local scale, and namely how to balance raising per capita costs with guaranteeing equity in accessibility. This article contributes to this debate by analyzing the spatial distribution of primary schools in the municipality of Vagos. It is based on a linear programming approach to optimize the resources needed for the operation and installation of school facilities and the level of accessibility that is provided. The simulated configurations are used as benchmarks for the actual spatial distribution of schools, identifying how it could be made more efficient or equitable and the criteria which have been prioritized in recent school planning policies. This allowed to conclude that, in the analyzed context, changes to the spatial distribution of schools have been made with significant equity concerns and that, while it would be possible to decrease costs through further consolidation, this would pose significant equity challenges.

scholarly journals Análise de mapas de recursos eólicos gerados por diferentes ferramentas numéricas para um terreno complexo

2020 ◽  
Vol 42 ◽  
pp. e30
Author(s):  
Adaiana Francisca Gomes da Silva ◽  
Cláudia Regina de Andrade ◽  
Edson Luiz Zaparoli
Keyword(s):  
Decision Making ◽  
Numerical Modeling ◽  
Spatial Distribution ◽  
Complex Terrain ◽  
Mesoscale Model ◽  
Local Scale ◽  
Data Availability ◽  
Simple Mass ◽  
Tendency Analysis

The objective of the present work is to compare the characterization of the local scale winds through different techniques of numerical modeling of the atmosphere. We compared four numerical methods to simulate the flow over a complex terrain, namely: CFD RANS with k-ε and k-ω (WindSim), simple mass conserving (WindMap), and refined mesoscale (SiteWind). The mentioned tools are very frequently utilized in the wind industry, and for this reason they have been selected. In this terrain, we had data availability from five meteorological masts during measurement periods that comprised 1.5 to 2 years. To ensure a free tendency analysis, equivalent settings have been used in the microscale models, with steady state, incompressible flow and neutrally stratified atmosphere conditions. Non-negligible differences are found on the spatial distribution of the winds simulated by the different models. Qualitatively, this disagreement hampers the decision-making. The five meteorological masts inside the area are important for adjusting and for checking the model, but they are not enough to categorically claim the superiority of accuracy of one model over the others. Nonetheless, these measurements provide us an indicative that the refined mesoscale model was able to better represent the wind acceleration in the studied region.

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