The Spatial Variation of Soil Infiltration Characteristic Parameters at the Regional Scale

A total of 29 infiltration test sites were conducted over the area using double-ring infiltrometers,and the parameters of all the sites were simulated with two selected models(Kostiakov model Philip model).Furthermore,the paper also analyzed infiltration characteristic parameters and explored the best infiltration model fitting for regional scale that was tested.At the same time,the cumulative infiltration was scaled and then spatial variation of aA was approved.The results showed that the soil infiltration characteristic parameters had obvious spatial variation;the scaling achieved through aA was better than through as,furthermore the aA had tendency to some extent and better in this region.Therefore the aA was used to scaled the soil characteristic parameters under similar soil texture,and analyzed quantitatively the movement of soil water,which provided guide for the macroscopical study on spatial distribution of soil water infiltration.