Calculation and Application of Soil Moisture Characteristic Curves Based on Field Observations in Plain Areas
In order to study the soil water characteristic curve and soil water movement law in the unsaturated zone of the humid plain area,and explore its impact on the regional water cycle process.The study monitored rainfall,evaporation,soil water con-tent,soil water potential,and groundwater depth in the Jintan field test in the plain area of the Taihu Basin,and obtained con-tinuous long series of hydrological data.Based on hydrological data,the dynamic changes of soil water were deeply analyzed in depth,and the results showed that the soil layer at a depth of 0-0.4 m below the surface was the zone with the most frequent and drastic in soil water.Using the VG model,the soil moisture characteristic curve(SWCC)parameters based on field measured data were numerically inverted and compared with the results obtained in the laboratory.The retrieved SWCC was used to numeri-cally simulate typical precipitation events.The research shows that the effect of soil water movement simulation based on field data is better,which better verifies the accuracy and reliability of the field observation curve model,and provides a reliable theo-retical basis for the calculation of soil movement and runoff yield in the plain area of the Taihu basin.
plain areaunsaturated zonesoil water characteristic curvenumerical inversionsoil water movement simulation
万方数据
维普
