Tianjin Research Institute for Water Transport Engineering

Tianjin, China

Tianjin Research Institute for Water Transport Engineering

Tianjin, China
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Wang C.,Tianjin Research Institute for Water Transport Engineering
IOP Conference Series: Earth and Environmental Science | Year: 2017

The Lancang - Mekong river is an important international waterway to Southeast Asia and South Asia, which has important strategic significance for promoting regional economic cooperation and safeguarding national economic and security interests. On the Mekong River, the main aim is to develop hydropower resources utilization and shipping. River Hydropower Stations are in Laos and designed by foreign enterprises according to the construction of BOT. In this study, on the basis of a lot of research work and extensive collection of relevant information, and, through in-depth analysis of research, it reveals that the upper Mekong River hydropower development have many adverse effects on international shipping, put forward related suggestions for the healthy and sustainable development of international shipping. © Published under licence by IOP Publishing Ltd.


Shen W.,Tianjin Research Institute for Water Transport Engineering
AIP Conference Proceedings | Year: 2017

ANSYS Fluent software is used in the simulation analysis of numerical wind tunnel model for the upper Spar platform module. Design Modeler (DM), Meshing, FLUENT and CFD-POST are chosen in the numerical calculation. And DM is used to deal with and repair the geometric model, and Meshing is used to mesh the model, Fluent is used to set up and solve the calculation condition, finally CFD-POST is used for post-processing of the results. The wind loads are obtained under different direction and incidence angles. Finally, comparison is made between numerical results and empirical formula. © 2017 Author(s).


Yan B.,Tianjin Research Institute for Water Transport Engineering
Proceedings of the International Offshore and Polar Engineering Conference | Year: 2015

The storm surge is a coastal flood phenomenon of rising water, which is an important safe factor for harbor and coastal engineering. A mathematical model was established to help estimate the rising water during the No. 9711 typhoon in Weifang harbor, which is protected by the double long submerged breakwaters. It is shown from simulated results that the model is able to reflect the changes of tides and currents around the harbor reasonable. The maximum wind set up in the Laizhou bay located by Weifang harbor from the prediction results is analyzed. Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE).


Xie M.,Tianjin Research Institute for Water Transport Engineering | Xie M.,Tianjin University
Ocean Modelling | Year: 2011

A three-dimensional numerical model was established to simulate the wave-induced currents. The depth-varying residual momentum, surface roller, wave horizontal and vertical turbulent mixing effects were incorporated as major driving forces. A surface roller evolution model considering the energy transfer, roller density and bottom slope dissipation was developed. The expression of the wave-induced horizontal turbulent mixing coefficient proposed by Larson and Kraus (1991) was extended to three-dimensional form. Plenty of experimental cases were used to validate the established model covering the wave setup, undertow, longshore currents and rip currents. Validation results showed the model could reasonably describe the main characteristics of different wave-induced current phenomena. The incorporation of surface roller for breaking waves should not be neglected in the modeling of surfzone hydrodynamics. The wave-induced turbulent mixing affects the structures of wave-induced current either in horizontal or in vertical directions. Sensitivity analysis of the major calibration parameters in the established model was made and their ranges were evaluated. © 2011 Elsevier Ltd.


Seawater samples collected between 2007 and 2012 were determined the concentrations of nutrient (DIN and DIP), total petroleum hydrocarbon (TPH), and six different heavy metals (As, Cu, Zn, Pb, Cd and Hg). The DIN, DIP, TPH, Pb, and Cd concentrations decreased from 2007 to 2009 or 2010 and increased after 2010. However, the Hg and Cu concentrations increased from 2007 to 2012. In contrast, the As and Zn gradually decreased during the study period. All of the pollutant concentrations gradually decreased from the shoreline to the offshore sites. PCA result showed that urban and port areas, agriculture, and atmospheric deposition were the main sources of pollutants in the bay. Although most of the pollutants were present at concentrations bellow the highest seawater quality standards in China, eutrophication was a risk in Bohai Bay. In addition, DIN was the main pollutant and was responsible for the eutrophication risk in Bohai Bay. © 2015.


Yan B.,Tianjin Research Institute for Water Transport Engineering
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

The tidal current is one of the most important factors for closure of a cofferdam in port and coastal engineering. A 3d mathematical model was established to help estimate the hydrodynamic environment in the process of closure of a cofferdam in Caofeidian Harbour. It is shown from simulated results that the model is able to reflect the vertical changes of currents around the project reasonable. The characteristic velocities in final closure from the prediction results were analyzed. Some suggestions were also proposed for the closure of the cofferdam. © 2015 Taylor & Francis Group, London, UK.


Li Y.,Tianjin Research Institute for Water Transport Engineering
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

The thin-plate rectangular weir is a measuring water device commonly used in laboratories; its measure accuracy of flow depends on the precision of weir flow calculated formula, weir manufacture and installation. This paper discusses four possible overflow shapes and its influence on the flux measure precision of the weir flow, summarizes the technical requirements of thin-plate rectangular weir production, and propose a calculation formula of weir flow which theoretically deduced by the weir width, weir head and flume water depth, the weir flow calculation result of this formula is very close to of Rehbock empirical formula which popular applied at present, it can be used for engineering application. © 2015 Taylor & Francis Group, London, UK.


Han Z.,Tianjin Research Institute for Water Transport Engineering
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

Based on the analysis of underwater topographic evolution, sedimentary characteristics, and the sediment depositional age, the causes and stability of Majia shoal are studied. The conclusions are shown as follows: (1) Majia shoal is a linear sand ridge sheltered by Majia Cape, and its underwater topography can keep stable; (2) Majia shoal consists of median or coarse sand, and formed during geological processes in Holocene, existing as thousands of years; (3) Wave at local sea area is not strong and current velocity is not large; (4) Suspended sediment concentration is low and sediment sources are limit; (5) Seabed sediment it is not active and cannot transport under wave and current action, so Majia shoal can maintain a stable state for many years. © 2015 Taylor & Francis Group, London, UK.


Han Z.,Tianjin Research Institute for Water Transport Engineering
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

The grain size parameters of seabed sediment are the most important information, which can indicate the distribution and transportation features of seabed sediment. A study on distribution features of grain size parameter in Leizhou Bay is conducted based on 109 samples data, which were collected in July of 2009. At the same time, using the Grain Size Transport Analysis model, transporting trend of seabed sediment had been analyzed. The research results are showed as follows: (1) seabed sediment types in Leizhou Bay are mainly sandy sediment, and only a small amount of clayey and silty sediments distribute at western bay and deep grooves in central bay; (2) seabed sediments in Leizhou Bay distribute with discontinuous features, which indicate that the transport trend of seabed sediments is not obvious, and the seabed sediment is not active, so seabed sedimentary environment and underwater topography can maintain a stable state; (3) seabed sediments in Leizhou Bay are mainly from inner continental shelf in northern South China Sea during post-glacial transgression and the sediment had gradually adapt to the modern hydrological and sedimentary environment. © 2015 Taylor & Francis Group, London, UK.


Xiao H.,Tianjin Research Institute for Water Transport Engineering
Hydraulic Engineering III - Proceedings of the 3rd Technical Conference on Hydraulic Engineering, CHE 2014 | Year: 2015

Based on the measured wave data within one year in Andaman Sea, Myanmar, the wave frequency spectrum and the directional spectrum are calculate by fast Fourier transform method. The frequency spectrum results show that single peak spectrum is given priority to this sea area, the annual average frequency spectrum peak period for 8 s, the wave spectrum energy is biggest in summer, followed by autumn, spring and winter; the directional spectrum results show that the wave energy concentrate angle is between 200°-250°, the main wave direction is southwest. © 2015 Taylor & Francis Group, London, UK.

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