Littoral processes along shoreline from Andhakaranazhi to Azhikode on the Kerala Coast

Abstract

Distribution of wave energy and variations in wave height and direction of longshore currents have been estimated from the wave refraction diagrams for predominant waves approaching the shore. A zone of strong energy concentration for waves of 14 sec period approaching from 240° has been identified near Azhikode. The direction of littoral current is northerly for waves approaching from 220s and 240° whereas it is southerly for waves approaching from 280* and 300°. Probable areas of rip currents have been identified along the shore. More areas of generation of rip currents have been located during southwest monsoon season when wave approach is from 260°. Regions of possible erosion and accretion have been identified. The coastline shows in erosional tendency under the influence of waves approaching from 220° and 240° and an accretional tendency under the influence of waves from 280° and 300°.