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| 1 | Simulation of three-dimensional cohesive sediment transport in Hangzhou Bay,China显示文摘Sediment transport in the Hangzhou Bay is extremely complicated due to its bathymetry and hydrodynamic conditions.The ECOMSED model is employed to simulate three-dimensional(3-D) cohesive sediment transport in Hangzhou Bay.Dynamical factors such as Coriolis force,tides,salinity,river discharges,and waves are considered in the model.The wave parameters,including the significant wave height,period,and direction,are calculated with the SWAN model.The Grant-Madsen model is introduced for the bed shear stress due to the combined effect of waves and currents.The formulation of bed shear stress used to calculate the sink/source terms is modified based on previous research that sufficiently validated the formulation with measurement data.The integrated model of the above-mentioned models is applied to simulate sediment transport in Hangzhou Bay.The results of the simulation agree well with field observations concerning the distribution of suspended sediment,indicating that the sediments are remarkably suspended in Hangzhou Bay under the action of waves and currents. | DU Panjun DING Pingxing HU Kelin | 2010 | Acta Oceanologica Sinica2010，29，2： | 11 |
| 2 | Numerical study on residual current and its impact on mass transport in the Hangzhou Bay and the Changjiang Estuary I. A3-D joint model of the Hangzhou Bay and the Changjiang Estuary显示文摘A 3-D numerical model is set up in a large domain covering the Hangzhou Bay and the Changjiang Estuary based on the ECOM model in orthogonal curvilinear coordinates.The numerical schemes for baroclinic pressure gradient (BPG)terms and convective terms are improved in the paper according to the characteristics of velocity field and mass transport in the area.The model is validated by the simulations of residual current and salinity transport in the Hangzhou Bay and the Changjiang Estuary. | Zhu Shouxian 1,2 ,Shi Fengyan 1,Zhu Jianrong 1,Ding Pingxing 11 .StateKeyLaboratoryofEstuarineandCoastalResearch ,EastChinaNormalUniversity ,Shanghai 2 0 0 0 6 2 ,China 2.MeteorologyInstituteofthePLAScienceandEngineeringUniversity ,Nanjing 2 11 | 2001 | Acta Oceanologica Sinica2001，20，1： | 5 |
| 3 | A three-dimensional diffusion equation of suspended sediment by waves and currents显示文摘Based on the law of mass conservation, a general three-dimensional diffusion equation of suspended sediment due to waves and currents, adaptable to estuarial and coastal areas, is derived by decomposing the instantaneous velocities and concentrations into three-dif-ferent-time-scale components respectively. A three-dimensional suspended sediment | Pingxing Ding Fengyan Shi Yazhen Kong | 1999 | Chinese Science Bulletin1999，44，19： | 2 |
| 4 | SHRINKAGE OF THE ESTUARINE CHANNELS OF THEHAIHE DRAINAGE SYSTEM AND ITS INFLUENCES ON FLOOD HAZARD显示文摘The reductions of runoff and sediment load in the Haihe River Basin and the causes of the shrinkage of the estuarine channels are analyzed in this paper it is concluded that the modern Yellow River sediment can be transported to the south part of the Bohai Bay, but rarely to the north part and the Tianjin Harbor. Sediment from the mid of the Bohai Bay does not affect the estuarine channels. The sediment caused the estuarine channels shrinkage are from the modern and ancient Yellow and the Haihe River deposit removed by wave. tidal current, and beach erosion. The influences of the estuary shrinkage on the flood discharge capacity of the river mouth channels and the flood hazard are discussed. The maximum capacity of the reservoirs and pools is about 20 billion m^3 in the south part of the basin while the capacity in the north part is only 7.5 billion m^3. Two 100 years floods occurred in the watershed in 1963 and in1996 with total runoff about 30 billion m^3 each. The economic loss in 1996 is about $6 billion, nearly two times of that in 1963 in the south part of the area. One of the main reasons is that the discharge capacity of the channels in the area had reduced by 50%. If another 100 years flood occurs in the south part again, the economic loss will be similar to that in 1996. If a 100 years flood occurs in the north part, the economic loss will be much higher than that in 1996. Because the storage capacity of reservoirs and pools in the area is much less than that in the south area. and discharge capacities of the north estuarine channels decreased more sharply than that of the south. Strategies for controlling estuary shrinkage are suggested. Physical and mathematical models show that trailer dredging combined with scouring with runoff or tidal water is economical and practical. Guiding dikes at the river mouths to prevent turbidity water entering into the estuarine channel will be a major strategy. Building a new gate combining the harbor may also mitigate the sedimentation of the mouth channels. | Hu, Shixiong Wang, Zhaoyin Ding, Pingxing | 1999 | International Journal of Sediment Research1999，14，2： | 2 |
| 5 | Physical mechanisms for the offshore detachment of the Changjiang diluted water in the East China Sea显示文摘 | Chen Changsheng Xue Pengfei Ding Pingxing | 2008 | Journal of Geophysical Research2008，113，02： | 1 |
| 6 | An implicit method using contravariant velocity components and its application to calculations in a harbour-channel area显示文摘The key problem in the computation of fluid dynamics using fine boundary-fitted grids is how to improve the numerical stability and decrease the calculating quantity. To solve this problem, implicit schemes should be adopted since explicit schemes may bring about a great increase in computation quantity according to the Courant-FrledrichsLewy condition. Whereas the adoption of implicit schemes is difficult to be realized because of the existence of two partial derivatives of surface elevations with respect to variables of alternative direction coordinates in each momentum equation in non-rectangular coordinates. With an aim to design an implicit scheme in non-reetangular ccordinates in the present paper, new momentum equations with the contravariant components of velocity vector are derived based on the shallow water dynamic equations in generalized curvilinear coordinates. In each equation, the coefficients before the two detivatives of surface elevations have different orders of magnitude, i. e., the derivative with the larger ceefficient rnay play a more important role than that with the smaller one. With this advantage, the ADI scheme can then be easily employed to improve the numerical stability and decrease the calculating quantity. The calculation in a harbour and a channel in Macao nearshore area shows that the implicit model is effective in calculating current fields in small size areas. | Shi Fengyan, Kong Yazhen and Ding Pingxing (State Key Laboratory of Estuarine and Coastal Research, East China Normal University. Shanghai 200062, China) | 1998 | Acta Oceanologica Sinica1998，17，4： | 1 |
| 7 | A 2D/3D hydrodynamic and sediment transport model for the Yangtze Estuary, China显示文摘 | Hu Kelin Ding Pingxing Wang Zhengbing | 2009 | Journal of Marine Systems2009，77，： | 1 |
| 8 | Changes in progradation rate of the tidal fiats at mouth of the Changjiang( Yangtze) River,China显示文摘 | Yang Shilun Ding Pingxing Chen Shenliang | 2001 | Geomorphology2001，38，： | 1 |
| 9 | DRY-SEASON VARIABILITY IN SUSPENDED SEDIMENT CONCENTRATIONS IN THE SOUTH PASSAGE OF THE CHANGJIANG ESTUARY显示文摘This paper reports the results of continuous monitoring of turbidity, water depth, salinity (using an Optical Backscatter Sensor (OBS)), and current velocity (using a Current meter (SLC9-2)) in the South Passage of the Changjiang Estuary over a spring–neap period in February 2003 (dry season). The turbidity measured via OBS was closely correlated with the suspended sediment concentration (SSC), which was highly variable. Over the study period, the SSC in the middle layer ranged from 110 to 1400 mg/l. The minimum SSC occurred during a late ebb tide, and the maximum SSC occurred during a late flood tide. On average, the SSC was 1.5 times higher during flood tide than during ebb tide. Vertically within the water column, SSC increased downward, with the ratio of SSC measured near the bed to that measured at the surface ranging from 1.90 to 18.3. The temporal variability in SSC is jointly governed by tides and wind-induced waves, whereas the vertical variability in SSC is attributed to the effect of gravity and vertical water circulation. | Wenxiang ZHANG Shilun YANG Jun ZHU Shiliang GONG Pingxing DING | 2007 | International Journal of Sediment Research2007，22，3： | 0 |
| 10 | Bispectrum and asymmetry of wave shape显示文摘Bispectrumandasymmetryofwaveshape￥DingPingxing;KongYazhen;andSunFu(StateKeyLaboratoryOfEstuarineand￣alR￣h,InstituteofEStuarin... | Ding Pingxing Kong Yazhen and Sun Fu (State Key Laboratory Of Estuarine and ￣al R￣h, Institute of EStuarine and ￣al R￣h, East China NOrmalUniversity. Shanghai 2(XX)62, China Laboratory of Physical ￣raphy, ￣n University Of Qngdao, ￣ac 266003, Chin | 1996 | Acta Oceanologica Sinica1996，15，3： | 0 |
| 11 | The second order spectrum of two-dimensional random waves显示文摘Thesecondorderspectrumoftwo-dimensionalrandomwaves￥DingPingxing;SunFuandYuZhouwen(ReceivedJanuary15,1993;acceptedMay31,1993)A... | Ding Pingxing Sun Fu and Yu Zhouwen | 1994 | Acta Oceanologica Sinica1994，13，1： | 0 |
| 12 | An experimental study of the relations between bispectra and nonlinear apparent features of wind waves显示文摘To investigate the nonlinear properties of wind waves, experiments are carried out in a wind-wave flume with slope bottom at different wind speeds and fetches. Both the internal structure and apparent features of the nonlin-earity of wind waves are studied by using bispectral and statistical analysis of surface elevations. The relations between bispectra and nonlinear apparent characteristics of wind waves are established and confirmed. | Ding Pingxing, Yu Zhouwen and Sun Fu Institute of Estuarine and Coastal Research East China Normal University, Shanghai 200062, China Laboratory of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003, China | 1993 | Acta Oceanologica Sinica1993，12，4： | 0 |
| 13 | On energy transport and group velocity of water waves显示文摘Onenergytransportandgroupvelocityofwaterwaves￥SunFu;DingPingxingandYuZhouwen(ReceivedAugust27,1993;acceptedOctober20,1993)(La... | Sun Fu Ding Pingxing and Yu Zhouwen ( Laboratory of Physical Oceanography, Ocean University of Qingdao, Qingdao 266003, China Institute of Estuarine and Coastal Research, East Normal University, Shanghai 200062, China Department of Science and Technolog | 1994 | Acta Oceanologica Sinica1994，13，4： | 0 |
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