This study aims to establish a managed sampling plan for rapid estimate of natural radio-nuclides
diffusion in the northern coast of the Oman Sea. First, the natural radioactivity analysis in 36 high volume
surface water samples was carried out using a portable high-resolution gamma-ray spectrometry.
Second, the oceanic currents in the northern coast were investigated. Then, the third generation spectral
SWAN model was utilized to simulate wave parameters. Direction of natural radioactivity propagation
was coupled with the preferable wave vectors and oceanic currents direction that face to any marine
pollution, these last two factors will contribute to increase or decrease of pollution in each grid. The
results were indicated that the natural radioactivity concentration between the grids 8600 and 8604 is
gathered in the grid 8600 and between the grids 8605 and 8608 is propagated toward middle part of
Oman Sea.