Configuration Red Soil Infitration And Apply Different Forecasting Model Of Soil

Southern Red serious soil erosion, soil different configurations red soil infiltration characteristics and apply forecasting model on red and Water Conservation District water control and soil moisture retention is significant. In order to explore different configurations soil red soil infiltration characteristics, this paper Quaternary red clay to build homogenous soil, different soil and red soil content remodeling undisturbed soil, soil column infiltration experiments, field observations and model fitting method, observation infiltration process, exploring homogeneous Red Earth, Red Earth and different tolerance reconstruction undisturbed red soil infiltration characteristics, and the regression equation was constructed in different configurations red soil infiltration rate and time to explore the accuracy of different forecasting models and applicability, field observation and analysis of the status quo of red soil infiltration redistribution changes. The main results are as follows:(1) Homogeneous red soil infiltration rate versus time curve approximates Philip infiltration model; wetting front rate varies with time showed power function.(2) Different content Reconstruction Red Soil infiltration process approximately homogeneous upper layer of red soil infiltration, infiltration infiltration rate at the interface to drop, the lower infiltration process infiltration rate basically stable. When the upper and lower soil bulk density are small, Horton model forecast accurately, when the upper and lower soil bulk density are larger, Founder three formulas forecasting more accurate.(3) Red soil infiltration capacity with decreasing initial soil moisture content and enhanced, the more dry soil infiltration capacity is stronger, but in the same time more shallow depth of infiltration, initial water content, the lower the longer the soil reaches saturation time, agricultural production drier red soil irrigation time should be extended, and increase the amount of irrigation.(4) It reveals the relationship between red soil infiltration capacity and bulk density. Red soil infiltration capacity with increased density decreases; wetting front rate was negatively correlated with soil bulk density, agricultural production should be properly scarified land will help improve the performance of infiltration, easy to transport water and nutrients.(5) It reveals the undisturbed soil water infiltration Infiltration Law and after redistribution, also obtained applicable prediction model. A complete cross-section of soil layer with good soil infiltration capacity, infiltration rate and cumulative infiltration significantly higher than the B layer, C layer of soil, the specific relationship of A> AB> B> BC> C, that is, when the water from the surface gradually infiltration process, infiltration capacity decreases accordingly. C layer of soil as a result of the flow refers tothe phenomenon, priority AB, B layer soil runoff. Founder three formulas described in the undisturbed soil infiltration process has a higher accuracy and better applicability.(6)Under natural conditions, the soil infiltration, soil moisture decreases linearly trend.