WATER WAVES AND SHORE PROTECTION
1° Year of course - Second semester
Frequency Not mandatory
- 3 CFU
- 24 hours
- INGLESE
- Trieste
- Opzionale
- Oral Exam
- SSD ICAR/01
- Free-choice subject
D1 - Knowledge and understanding
At the end of the first module, the student must know the basic aspects of maritime hydraulics (waves and currents) and the use of energy supplied by the sea for the generation of mechanical and electrical energy.
At the end of the second module, the student will have the skills for a preliminary design of a maritime work and coastal dynamics.
D2 - Ability to apply knowledge and understanding
The student must be able to perform basic studies of problems of maritime hydraulics, calculation of energy transformation systems of the sea and the main coastal defense systems
D3 - Autonomy of judgment
At the end of the course, the student must be able to carry out a critical examination to verify the correct application of the knowledge acquired and applied to the engineering problem studied
D4 - Communication skills
At the end of the course, the student must be able to correctly illustrate and with the correct use of technical terms the knowledge and practical skills acquired
D5 - Learning ability
The student must be able to tackle the preliminary design of energy recovery systems from the sea and defense systems starting from the degree thesis that during the professional life
The student has knowledge of fluid mechanics, fundamentals of structural design and geotechnics
The course is divided into two modules:
The first provides the fundamentals of wave theory in typical marine and tidal situations and describes the systems for transforming energy from waves and currents; The second is aimed at the effects of waves and currents on the coastline and on coastal defense works
Coastal Engineering Manual http://users.coastal.ufl.edu/~mcdougal/CEM/CoastalEngineeringManual.htm
J.W. Kamphuis, Introduction to Coastal Engineering and Management, Adv. Series on Ocean Engineering – vol. 16, World Scientific
R.G. Dean & R.A. Dalrymple, Water wave mechanics for engineers and scientists, Adv. Series on Ocean Engineering – vol. 2, World Scientific
R.G. Dean & R.A. Dalrymple, Coastal Processes (with Engineering Applications), Cambridge University Press
Wave and Tidal Energy. Editor(s):Deborah Greaves, Gregorio Iglesias, 2018 John Wiley & Sons Ltd.
1) Sea level:Astronomical tide, meteorological tide, subsidence and climate change. Statistical forecasting methodologies. Measurement techniques.
2) Waves: Genesis of wind waves. Notes on the genesis of the wind, Beaufort scale, measurement methods, geostrophic wind and real wind.
3) Linear theory. Field equation. Dispersion relation in shallow water and deep water. Wave groups.
4) Transformation of waves from open sea to shore: refraction, diffraction, shoaling, breaking, reflection.
5) Wave spectra, statistics of heights and periods, wave energy. Empirical formulas for spectrum forecasting, SMB method.
6) Genesis of currents: mass balance equations and momentum for oblique waves incident on the coast. Radiation stress, wave set-up, littoral currents, rip currents. tidal energy generation, tidal range and tidal stream.
7) Fundamentals of wave energy conversion theory
8) Classification of wave energy converters and description of the main categories of WECs. tidal stream turbines (TSTs): horizontal-axis tidal turbines (HATTs), vertical axis tidal turbines (VATTs), venturi effect devices and oscillating hydrofoils.
9) Fundamentals of device design and power systems
Modulo 2: Coastal defense infrastructures: design and hydromorphological effects.
1) Protection systems in relation to the factors characterizing the site. Choice of the life cycle of the structure and the design stresses.
2) Wave-structure interaction: Wave-structure interaction in the case of barriers parallel to the shore: wave rise, overflow, transmission, reflection. Identification of the design parameters of the barriers most significant for the damping of wave energy and beach protection.
3) Morphodynamics in the presence of structures in boulders
4) Morphological effects of the barriers on the shoreline (salients, tombolos) and on the seabed (erosion localized at the foot of the structure and erosion close to the structure).
5) Functionality of structures perpendicular to the shore (groynes)
6) Design of structures in boulders
7) Design of structures in boulders (barriers, groynes). Hydraulic stability: sizing of the mantle and protection at the foot. Filter sizing criteria and geotechnical stability. Structure settlement and siphoning.
8) Construction notes: Replenishment interventions Implementation methods. Initial and replenishment volumes. Sediment dispersion, effectiveness of the intervention over time, subsidiary containment works. Sediments used, borrow pits, environmental screening.
9) Integrated and eco-compatible design. Socio-economic aspects in the construction of coastal defenses and design guidelines. Ecological effects of rigid defenses and criteria for design with lower environmental impact.
Frontal teaching and laboratory consisting in the development of a basic project of a marine energy recovery system and of a maritime structure
This subject is preparatory for experimental degree theses in the field of marine engineering.
Oral exam, and analysis of the reports.
This course explores topics closely related to one or more goals of the United Nations 2030 Agenda for Sustainable Development (SDGs)