![]() Most commonly observed behind breakwaters. A satellite of wave diffraction at a harbor jetty is shown in Fig. The process by which wave energy is transmitted laterally along a wave crest into a sheltered zone. ![]() Stelzriede 1 Diffraction is an important factor in the determination of the distribution of wave energy within a harbor, and therefore is of importance in harbor design. ![]() The analytical solution for diffraction behind a semi-infinite breakwater is shown in Fig. Diffraction of Water Waves by Breakwaters By John H. Design studies of breakwaters or other structures in nearshore waters make generally use of physical scale models or numerical models for determining the wave diffraction pattern.Ī theoretical derivation of wave diffraction around simple structures in the ideal case of small shallow-water waves in areas of uniform depth (applying linear wave theory) has been given by Penney and Price (1952). The theoretical derivation of the wave diffraction pattern is generally not simple because wave conditions at the boundaries of the obstacle have to be taken into account, as well as conditions at the boundaries of the area in which waves are propagating and the effects of bathymetric wave refraction and wave transformation in shallow water. In this view, wave propagation into a semi-closed area is the interference sum of all the waves that propagate radially from a wave front at the open boundary into this area. This principle holds for all types of wave propagation, including water waves. Wave diffraction at an obstacle illustrates Huygens' principle, which states that every point of a wavefront is a source of waves radiating from this point. This is the common definition for Diffraction, other definitions can be discussed in the article The meaning of DIFFRACTION is a modification which light undergoes especially in passing by the edges of opaque bodies or through narrow openings and in which the rays appear to be deflected also : a similar modification of other waves (such as sound waves) or of moving particles (such as electrons).
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