Study On Field Investigation And Physical Simulation Experiment Of Hummocked Ice In Liaodong Bay

Based on sea ice field investigation data and satellite imagery of Liaodong Bay in winter of 2005 and 2006, combined with laboratory physical modelling, image processing techniques are employed to study hommock ice in shore.In the first chapter, the influence of sea ice to ocean exploitation and engineering of our nation is firstly introduced, and flowed with the research status and meaning of hommocked ice study.In the second chapter, the field investigation techniques to observe sea ice surface morphology in Liaodong Bay are presented, including measurement of surface fluctuation by total station, measurement of height of cross-section by digital camera, variation of ice edge by GPS. Also the piled process from the point of view of ice drift is observed by CCD, including size, velocity and concentration of drifting ice. Then, according to the distribution characteristics of sea ice in shore, the whole regions are divided into three parts as: frozen area, piled area and drifting area. Combing with the chart, the boundary of each area is also determined.The characteristics of hommocked sea ice after the piled process has been finished are discussed in the third chapter. From the point of ice edge and piled morphology, variation of hommocked ice edge, height of ice cross-section, tangent angle at mean height and profile fluctuation are analyzed here. The characteristics of drumlin in the piled area are also discussed, including tangent angle, size, thickness, relative height during tide, and variation of surface morphology. The drifting ice inshore is discussed at last, and the size, velocity and concentration of the drifting ice are obtained.In the last chapter, laboratory physical tests are employed to study the process and phenomenon of sea ice piled by controlling the test conditions artificially. Through these modelling tests, the angles of ice climb-up, the max piled height, the statistical size of broken ice and other important parameter are analyzed, and reveal a nice agreement with field observation after comparison.