摘要
针对非饱和土壤水分特征曲线传统测定手段耗时长、成本高且精度存在明显不确定性等问题,研究了土壤水分特征曲线参数估计的数值反演方法,建立了数值反演计算的数学模型,提出了反演计算方法,并将反演结果与室内试验数据进行了比较,同时采用田间实测数据进行了验证.结果表明,此反演计算方法推求的土壤水分特征曲线参数与试验实测值具有很好的一致性,可以用于田间复杂情况下参数的推求.
With regard to the problems of the traditional methods for determining the unsaturated soil water characteristic curves, such as the long time requirements, high cost and low precision, the parametric inversion method for estimating soil water characteristic curves was studied. A mathematical model for the parametric inversion was established, and the relevant methods for calculating the parametric inverse were put forward. The results were compared with laboratory test data and validated with measured data from farmland. The results indicate that the parameters for the soil water characteristic curves derived with this method agree with the measured data, and the method can be used in complex farmland conditions.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第4期373-377,共5页
Journal of Hohai University(Natural Sciences)
基金
国家重点基础研究发展计划(973计划)(2006CB403402)
引进国际先进水利科学技术规划(948项目)(200719)
国家"十一五"科技支撑计划(2007BAD38B05)
关键词
数值反演
土壤水分特征曲线
VG模型
parametric inversion
soil water characteristic curve
VG model
