Surface Layered Soil Vertical Permeability Spatial Variability Of The Pilot Study

Water movement and distributing status is a very important tache of fanning ecosystem of a region. Vertical infiltration capacity of topsoil influence on distributing of farmland magnitude of soil water, proportion and process of precipitation reallocate on the earth's surface, development and evaporation of shallow groundwater etc. At present, experts acquire some achievements through the study of vertical infiltration capacity of the earth's surface. Yet field experiments mostly carry through on the surface of ground surface layer, less consider vertical layers of topsoil, compare at the difference of vertical infiltration capacity of ground surface layer and the bottom of ploughed layer, the existing of the bottom of ploughed layer influence on vertical infiltration capacity of ground surface layer. On the other hand, infiltration experiment mostly carry through on an appointed spot on a certain field plane, thereout the results gained only represent vertical infiltration capacity of that spot. It can't reflect the distributing status on the plane neither can find out space variability of vertical infiltration capacity. In this article, the author will describe general infiltration experiment of ground surface layer and the bottom of ploughed layer of Yu Cheng region, analyze experimental data by the theory of regionalized variable, educe space self correlation function values and variogram values of steady infiltration rate and infiltration experiential index, make certain their variable extent and space correlative scale, draw isoline diagram of steady infiltration rate and infiltration experiential index by method of best and unswerving inserted value, hereby analyze rule and difference of infiltration of ground surface layer and the bottom of ploughed layer, along with space configuration and variability character.