[Spatial variability of slope land soil solute transport parameters].

In this paper, the transport parameters of chlorine in a slope land soil were determined in situ by fitting breaking-though curve, and the spatial variability of the parameters in a 41 m x 5 m runoff plot was analyzed by using traditional and geo-statistics. The results showed that the average pore-water velocity increased gradually from the top to the bottom of the slope, and the diffusive-dispersive coefficient (D) had no remarkable variation within 20m away from the top but gradually increased with the distance beyond 20m. The dispersivity (alpha) had the same characteristics as D. The pore-water velocity (v) had a floating feature on the slope, while parameters D and alpha showed obvious spatial correlation characteristics, the range of the spatial correlation being 21m and 10m, respectively.