INTRODUCTION: BY SUPERPOSITION OF AN INCIDENT WAVE IMPINGES ON A COASTAL BREAKWATER AND THE REFLECTED WAVE FROM IT A SERIES OF STANDING WAVES IS GENERATED IN FRONT OF A COASTAL BREAKWATER OUTSIDE THE SURF ZONE. DEPENDS ON THE SLOPE OF THE BREAKWATER THE REFLECTING WAVE GENERATES THE FULLY STANDING OR PARTIAL STANDING WAVE. DURING THE FORMATION OF STANDING WAVES A SERIES OF RECIRCULATING CELLS OF STEADY STREAMING FLOW IS PRODUCED, WHICH IS THE MOST EFFECTIVE FACTOR IN LOCAL SCOURING IN FRONT OF COASTAL BREAKWATERS. CARTER ET AL. STUDIED THE HYDRODYNAMICS OF STANDING WAVES IN FRONT OF VERTICAL BREAKWATERS.