Breakwaters are structures which are constructedin order to create peace in a pool of ports, to preventport erosion, and to protect the shipping channel. The sensitivity of these breakwaters to environmental conditions on the one hand and highexecutive costs and difficulty of maintenance on the other hand, as well as the importance of constructions on the top and behind these structures has made the design of the typical mound and Caisson compound breakwaters associated with a certain elegance. There are different rules for optimal design of the breakwaters. In designing Caisson compound breakwaters, at least five parameters can be changed. These variables include: (1) the height of the mound under Caisson, (2) the width of Caissons, (3) height of vertical cross- sectioncrest, (4) the width of the platform, (5) the depth of armor layer of mounding foundation to the water surface.The aim of this study was to evaluate the effect of each environmental feature of Kharg Island in designing this type of breakwater. To this end, the geometric sensitivity of these structures to the features of breakwater waves at different depths is evaluated. In this study, the specific circumstances of the region are first presented. Then, using authentic equations and the Breakwat and CRESS software, the features of the required stones have been calculated at different levels.
