Abstract: 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×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 (α) had the same characteristics as D.The pore-water velocity (v) had a floating feature on the slope,while parameters D and α showed obvious spatial correlation characteristics,the range of the spatial correlation being 21m and 10m,respectively.

Key words: Rice, Upland cultivation, Water use efficiency, Yield