6110ENG: Coastal Engineering and Modelling - Report Writing Assessment Answer

Code: 6110ENG

Coastal Engineering and Modelling Report Writing Assessment Answer

Assignment Task: Question 1: 6110ENG A submerged pressure sensor can serve as a wave gauge if it is adequately sensitive to detect the wave induced dynamic pressure. There is a swell wave with the deep-water characteristics (period T0 and wave height H0 measured by an offshore buoy) perpendicularly propagating toward a straight shoreline. At the coast near the shoreline, a pressure sensor is installed as shown in the Figure below. For the progressive swell wave, the minimum and maximum pressures (Pmin and Pmax at the Sensor are recorded as well. (The density of seawater to be 1026 kg/m3). The wave data of 5 storm events have been included in the Table below. Develop a simple coastal model to (i) estimate the swell wave height at the coast using the measured data and (ii) estimate the Shoaling Coefficient for all events. Assume the linear wave theory is valid. Numerical solutions - 6110ENG Develop a simple model using MATLAB to: (i) Calculate the wave characteristics (i.e. wave height, wave length, wave number, wave celerity) at the coast by solving the Dispersion Relation Equation numerically using fzero( ) function in MATLAB with relevant linear wave equations; (ii) Calculate the Shoaling Coefficient using two methods: (i) the linear wave theory and (ii) the recorded data, for all 5 events; and compare the results from both methods for further uncertainty discussion. Generate a figure to show the relationship between the relative water depth and the shoaling coefficient; (iii) Generate figures to show the surface wave elevations timeseries (i) offshore and (ii) at the coast for Event 1 over 4 wave periods, and (iv) Generate figures to present the vertical profile (from bottom to the surface) of the maximum water particle horizontal and vertical velocities at the location of the Sensor for Event 5 (for the discussion of the relationship between the maximum horizontal and vertical velocities). Report - 6110ENG Complete a report that address and solves all tasks listed above. It must include: ? Introduction: Introduce the problem and explain your methodology, i.e. problem formulation including all relevant equations and numerical method used ? Results and discussion: Display the data in a clear and appropriate manner, i.e. all figure axes and table columns must be properly labelled with the correct units, captions and brief explanation and discussion are required for all figures. ? Conclusion: A brief analysis that summarises the data and draws some conclusions. Question 2: 6110ENG The long-term wave data (recorded at a certain location over a long period of time) provides the probability or number of occurrence of sea states in a specified ocean area. Typically, a minimum return period (T) of 100 years is required for design conditions. If it is accepted by the coastal engineering design guidelines A minimum return period of 50 years may be specially considered. Statistical distributions are used as a tool to generate recurrence interval and estimate specific design wave characteristics. Numerical - 6110ENG Develop a simple model to analyse long term waves using MATLAB and the provided data set: (1) Generate a scatter diagram and the histogram of the monitoring wave data set. Show the maximum wave of each year. (2) Calculate and show the cumulative probability density function of wave events (3) Calculate and show the probability of exceeding of the wave heights and compare it with Rayleigh Distribution. Report  Complete a report that address and solves all tasks listed above. It must include: ? Introduction: Introduce the problem and explain your methodology, i.e. problem formulation including all relevant equations and numerical method used ? Results and discussion: Display the data and results in a clear and appropriate manner, i.e. all figure axes and table columns must be properly labelled with the correct units, captions and brief explanation and discussion are required for all figures. Interpret and describe the significance of your finding from the presented results. The limitation of the method must be discussed as well. ? Conclusion: A brief analysis that summarises the data and draws some conclusions.

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