M.Sc Civil Engineering Master Thesis
Trend: Hydraulic Structures
Abstract
Due to its special geographical location, Lange port has been operating as a cargo and passenger transit station since the distant past. During the past years, this activity has raised expectations from it, so that its development plan has been implemented. Foresight in the development of the port has led its management to consider the acceptance of larger vessels in the development plan, so that with the implementation of the extension of the eastern breakwater, the area of ??the resulting 28-hectare basin will allow the passage of vessels of 7 to 10 thousand tons in the near future. Currently, the use of a large volume of traditional vessels (barges) in the basin and the lack of sufficient space for anchoring them has led to the stopping of vessels on the entire surface of the basin. In the Lange port development plan, the mooring lines are placed in such a way that 99% of the time in the pond, they are calm (the height of the waves at the foot of the pier is less than 30 cm). However, in the remaining 1% of the time, waves such as Soheili waves (180 degree waves), which have a very low occurrence rate, do not have the calm conditions necessary for the anchoring of barges in the entire port, and they disrupt the mooring of vessels. The purpose of this research is to provide a solution to create suitable operating conditions at all times of the year. BW model from Mike21 software package was used to check the penetration of waves inside the pond and to check its calmness. According to the regulations of Japan, which limits the permitted percentage of waves over 0.3 meters in the mooring lines (at the docks) to 2.5 meters, equivalent to 9 days a year, with the level of turbulence of about 1% of the basin, the operating conditions are intended against coastal waves from 180 degrees and despite the low occurrence of these waves, about 3 to 4 storms a year to provide calm conditions on the entire surface of the basin, which the barge faces a problem. In this research, after studying the climate and weather conditions of Bandar Lange, various options to create peace throughout the year have been presented by simulation and the appropriate option has been proposed by carrying out technical and executive reviews.
Key words: breakwater far from the coast, calmness of the pond, Soheili waves, numerical simulation (modelling)
1. Chapter 1
General research
1-1- Introduction
Hormozgan province with an area of ??about 68,475 square kilometers, this province borders Kerman province to the north and northeast, the Persian Gulf and the Oman Sea to the south, and Sistan and Baluchestan to the southeast. And it is bordered by Fars and Bushehr provinces from the west.
Bandar Langeh city, located in Hormozgan province, is one of the oldest ports in Iran, whose center is located at 54 degrees and 54 minutes of east longitude and 26 degrees and 23 minutes of north latitude. On the south side, it is bordered by the blue bed of the Persian Gulf.
It should be noted that this city has been engaged in trade with the countries of the Persian Gulf since ancient times and plays a significant role in the regional economy.
Since the Ports and Maritime Administration has a long history as one of the economic centers of the city, it is necessary to pay attention to its development plans.
1-2- Statement of the research problem
Port development plan Lange has recently been implemented by the Ports and Maritime Organization, in such a way that the two separate basins have been integrated and the problems of the intrusion of the old waves of the basin have been solved even where possible. However, because of the entrance of the port, the pond cannot be protected from all directions, this pond faces problems from the waves caused by the Suhaili wind (waves that propagate from the south to the north in the vicinity of the port). In this research, an attempt is made to evaluate the importance of this problem and the solutions to deal with it.
1-3- The importance and necessity of conducting the research
The intrusion of waves into the port basin at some limited times of the year causes turbulence and disrupts the operation of the port and mooring, unloading and loading operations for some vessels. In this research, the strategies to deal with the intrusion of waves caused by the Soheili wind into the Langeh Basin are evaluated and compared.
1-4- Research objectives
In this research, solutions to prevent Soheili storm from entering the basin are investigated and presented, and the results can be used to complete the port development plan. Also, the results of this project can be used by the Lange Port Authority and the Ports and Maritime Organization to improve the service of the port basin to the operating vessels. Also, some of the southern ports of the country, especially Hormozgan province, are facing this problem and the results of this thesis can be useful for those ports. The wind information is extracted from the data of the Meteorological Organization and the wave information is obtained from the studies conducted by the Ports and Maritime Organization. By examining and processing the available information, the characteristics of the wave climate in the area of ??Langeh port are extracted. In this research, the wave of the port mouth was obtained from the studies of consultant engineers in the port administration of Langeh port, as well as monitoring studies (simulation of the waves of the Oman Sea and the Persian Gulf) of Hormozgan province. In this way, wind was applied to the model area of ??the Persian Gulf and the Oman Sea and waves were generated. Possible options to deal with the influence of waves caused by Soheili wind will be investigated and presented into the harbor basin.
Using mathematical simulation of wave penetration with the help of Mike 21-BW software, the height and incidence of waves penetrating into the basin in front of the docks will be calculated.
Possible options in paragraph 2 will be compared and evaluated from the point of view of their effectiveness in operational and technical issues.
1-6- Final chapters Letter
This thesis includes the following chapters:
Chapter 1: Generalities of the research
In this chapter, after the introduction, the problem discussed in the research is presented and the importance and necessity of conducting the research is stated. Then the final goals and implementation methods to achieve these goals are discussed.
Chapter Two: Introduction of Lange Port
In this chapter, the characteristics of Lange Port are stated and a brief history, environmental conditions and port development plan are given.
Chapter Four: Modeling Method
In this chapter, the theoretical foundations are first discussed and the governing equations of the problem are presented, then the mathematical model used is introduced and how it is used. Also, the calmness criteria of the Bandar pond are mentioned.
Chapter 5: Modeling results
In this chapter, the results of modeling are presented and reviewed.
Chapter 6: Discussion and conclusion
In the final chapter, the conclusions of the thesis results are presented and suggestions are made to improve this research.
Chapter Two
Introduction of Bandar Lange
2-1-Introduction
Bandar Lange, or the pearl city, which was once called the bride of Iran's ports, is slowly removing the dust of isolation from its face and regaining prosperity. This port has a long history, in time Achaemenian was one of the important and commercial ports of the Persian Gulf and it was named as Gogana port. During the time of Zandian, its trade was increased.
The main food of the people is fish, which is also considered as one of the important economic resources of the region. Fishing tools are often old and traditional, and nets, hooks and gregor (cage) are used, but modern conditions are also desired in fishing through fisheries. Previously, all kinds of pearls with different luster and color were caught in the waters of Bandar Lange, but now it has faced stagnation, and because of this, the name of pearls is also applied to this city.
Currently, there is no news of large pearls, agriculture, and modern industries in Bandar Lange, and people earn their living only through fishing and trade. Bandar Lange has many economic potentials, such as many mines.
The proximity of the Arabian cliffs on the coast of the Persian Gulf has also provided a great opportunity for this city that the development of port infrastructure makes it possible to use [15]. has been operating