مهندسی عمران-سازه های هیدرولیکی
roozbeh aghamajidi; amir kamanbedast
Abstract
In this study, the effect of change of flow discharge on the scouring around the piers of the fifth bridge of Dezful was investigated using the Hsec-RAS numerical model. For this purpose, a hydraulic model was created from the range of the river in which the bridge is located in the software by using ...
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In this study, the effect of change of flow discharge on the scouring around the piers of the fifth bridge of Dezful was investigated using the Hsec-RAS numerical model. For this purpose, a hydraulic model was created from the range of the river in which the bridge is located in the software by using field data. Then, by entering the data on the scouring of the bridge bases for the discharge of 25 to 1850 m3/s with different time steps, the effect of change of flow discharge on the scour around the middle and lateral piers of the bridge was investigated. The results of numerical model show a trend The increase was such that in low to moderate discharges (329m3/s) the scouring rate around the middle piers had the highest value, but in high discharges and flood conditions the scurry in the right support had the highest value, also up to 1630 m3/s flood conditions, the scouring rate in the left support had the lowest value, which was due to the morphology of the river bed and the Conditions are the creation of secondary currents in the arc.
مهندسی عمران-سازه های هیدرولیکی
roozbeh Aghamajidi; Alireza EttehadNia
Abstract
The purpose of this research is to predict the environmental effects of the water transmission line project on the environment. The research method is descriptive and analytical using existing resources. Investigations showed that in the design of the water transmission line, the implementation of environmental ...
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The purpose of this research is to predict the environmental effects of the water transmission line project on the environment. The research method is descriptive and analytical using existing resources. Investigations showed that in the design of the water transmission line, the implementation of environmental considerations can play an effective role in controlling and reducing the harmful effects of the environment. Therefore, it is necessary to strictly implement measures and solutions to reduce environmental effects in water transfer areas. This is suggested by carrying out preferential environmental impact assessment studies for the superior option from the technical, economic, social and environmental point of view. On the other hand, one of the success factors in the sustainability of development plans is the degree of acceptance of these plans by the people and local communities and their participation in the implementation and exploitation of the plan. Since the project of transferring water from the Persian Gulf is carried out with the main goal of supplying water to industries in the southeast of the country, it seems that in the short term it is not possible to supply drinking water to the residential areas within the scope of the project. However, if local labor force is used in the implementation and exploitation phase and the project is welcomed by the human communities related to the project, this project can have positive effects on the social, economic and cultural environment of the project.
