Estimation of environmental capacity of phosphorus in Gorgan Bay, Iran, via a 3D ecological-hydrodynamic model

2016 ◽  
Vol 188 (11) ◽  
Author(s):  
Mohammad Hassan Ranjbar ◽  
Nasser Hadjizadeh Zaker
Keyword(s):  
Hydrodynamic Model ◽  
Environmental Capacity ◽  
Gorgan Bay

scholarly journals Investigation of the two-dimensional model of water flow in the Gorgan Bay under the influence of various hydrodynamic factors using Mike 21 software

2017 ◽  
Vol 7 (4) ◽  
pp. 366-373
Author(s):  
Afshin Mohseni Arasteh ◽  
Majid Dastdaran ◽  
Hossein Morovvati ◽  
Masoud Torabi Azad ◽  
Kamran Lari
Keyword(s):  
Flow Velocity ◽  
Water Level ◽  
Flow Pattern ◽  
Water Flow ◽  
Hydrodynamic Model ◽  
Open Boundary ◽  
Two Dimensional ◽  
Gorgan Bay ◽  
Hydrodynamic Factors ◽  
Mike 21

<p>This research aims at studying the field and the nature of the flow pattern within the Gorgan Bay. The sandstone slabs of Miankaleh and Gorgan Bay openings under the hydrodynamic factors are constantly changing. Various factors such as wind, sea level fluctuations and flow are affected by this deformation.<br />In this paper, the two-dimensional hydrodynamic model of Gorgan Bay is presented using the Mike 21 hydrodynamic model software to calculate the flow velocity. Changes in water level at the only open boundary of the model (Ashuradeh - Turkmen port), Gulf primary water level, Meteorological parameters including precipitation, evaporation, wind speed and direction, time step, ambient heat exchange, and coefficient of roughness of the floor in the appropriate range to the model Applied. Using flow velocity data, the hydrodynamic model was accurately calibrated and verified. The results of the model state that the average direction of flow in a year in the Gorgan Bay is clockwise. The average water flow rate is 0.029 m/s, and the flow pattern calculated by the model is compared with the continuous measurements of flow through float tracking in two stages and the results are confirmed.</p>

Evaluation of Loosening and Soil Compaction with a Working Tool of Tillage Machines Using a Hydrodynamic Model

2020 ◽  
Vol 13 (6) ◽  
pp. 394
Author(s):  
Salavat Mudarisov ◽  
Ildar Farkhutdinov ◽  
Airat Mukhametdinov ◽  
Raushan Aminov ◽  
Rustam Bagautdinov ◽  
...  
Keyword(s):  
Hydrodynamic Model ◽  
Soil Compaction

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Iskendar Iskendar ◽  
Andi Jamaludin ◽  
Paulus Indiyono
Keyword(s):  
Comparative Study ◽  
Model Test ◽  
Hydrodynamic Model ◽  
Surface Effect ◽  
Center Of Gravity ◽  
Test Results ◽  
Flat Bottom ◽  
Towing Tank ◽  
Test Models ◽  
Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft  was fitted with  stephull  form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model  as a comparative study. The hydrodynamic  tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft  of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves.  Test results show that models  with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

Modeling the Snow Deposit Process on the Highways in the Flowvision Software

2020 ◽  
pp. 72-83
Author(s):  
Т. В. Самодурова ◽  
О. В. Гладышева ◽  
Н. Ю. Алимова ◽  
Е. А. Бончева
Keyword(s):  
Hydrodynamic Model ◽  
Geometric Model ◽  
Information Resources ◽  
Road Maintenance ◽  
Snow Removal ◽  
Experimental Section ◽  
Deposit Modeling ◽  
Winter Road ◽  
Highway Embankment ◽  
Winter Road Maintenance

Постановка задачи. Рассмотрена задача моделирования отложения снега во время метелей на автомагистралях с барьерными ограждениями в программе FlowVision . Результаты. В качестве опытного участка рассмотрен участок автомагистрали, проходящий в насыпи. Создана геометрическая модель участка автомагистрали. Обоснованы информационные ресурсы для создания гидродинамической модели обтекания насыпи автомагистрали с барьерными ограждениями снеговетровым потоком во время метелей. Проведено моделирование процесса снегонакопления на опытном участке с использованием программного комплекса FlowVision во время метелей с различными параметрами. Выводы. Сделан вывод о возможности применения программного комплекса FlowVision для совершенствования методики назначения снегозащитных устройств и определения параметров снегоочистки при зимнем содержании автомобильных дорог. Statement of the problem. The problems of snow deposit modeling on the highways with crash barriers during blizzards in the FlowVision was discussed. Results. The highway section passing in the embankment as an experimental section has been considered. The geometric model of the highway section was created. The information resources for designing a hydrodynamic model of a snowflow stream of highway embankment with barriers during blizzard were identified. The modeling of the snow deposit process in the experimental section using the FlowVision software during blizzards with different parameters was carried out. Conclusions. It was concluded that it is possible to use the FlowVision software to improve the methodology for snow protection designing and determining snow removal parameters for winter road maintenance.

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