Abstract
This paper presents a statistical analysis for tracer dispersion in turbulent flow within and over a permeable bed. The analysis is made for the concentration change spatially and temporally. The spatial and temporal statistical tests provided establishment for tracer migration with turbulent flow within and over permeable bed. The study includes statistical investigation for the effect of bed geometry, tracer location and injection duration on tracer dispersion through fully developed turbulent flow in detail. The temporal statistical analysis for the tracer distribution was computing for the variance. The second is for the spatial variance, where the skweness and the variance were estimated using previously published correlations. Compute the time variance, spatial variance and skweness. The input data for each case was the averaged concentration with time for different locations within each flow zone. The results were compared graphically. It is found that the spatial variance increases at the zone where it penetrates to, which indicate that there is a continuous tracer support from the source zone to the other one. Further, the free stream pulse injection results show that there is a higher rate exchange between the free stream and porous zone than that on the opposite situation. Furthermore, the time variance is higher at the sparse case compared with the dense case.