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冻融土壤Kostiakov入渗模型参数的非线性预报模型

作  者:
郭华;樊贵盛
单  位:
太原理工大学水利科学与工程学院
关键词:
冻融土壤;Kostiakov模型参数;多元非线性;冻融期;水分入渗
摘  要:
在山西汾河灌区季节性冻土区进行了3个越冬期的大田冻结土壤水分入渗试验,获取了Kostiakov冻结土壤二参数入渗模型参数的实测大样本,建立了各个土壤水分入渗参数与土壤理化参数间的非线性关系模型;通过MATLAB软件,实现了Kostiakov二参数入渗模型系数的求解。研究表明:用常规土壤理化参数土壤含水率、密度、物理性黏粒含量、土壤温度和有机质含量作为非线性预报模型的输入参数实现对入渗参数的预测是可行的,所建立的非线性关系模型高度相关,预测参数的实测值与预测值的相对误差可控制在10%以下。因此,用土壤常规理化参数对冻融土壤的水分入渗参数进行非线性预报是可行的,可为季节性冻土区冬季储水灌溉提供技术支撑。
译  名:
Kostiakov Parameter Nonlinear Prediction Model for Thawing Soil Water Infiltration
作  者:
GUO Hua;FAN Gui-sheng;College of Hydroscience and Engineering,Taiyuan University of Technology;
关键词:
thawing soil;;Kostiakov model parameter;;nonlinear prediction model;;thaw period;;water infiltration
摘  要:
Through thawing soil infiltration tests at three overwintering stages in the seasonal freezing and thawing soil of Shanxi Fen River Irrigation Area,a large measured sample of Kostiakov model was obtained to establish the nonlinear relationship model between each infiltration parameters and soil physicochemical parameters of soil;and the Kostiakov model was solved by MATLAB software.The results showed that:it was reasonable to use soil water content,soil bulk density,soil physical clay content,soil temperature and organic matter content as input parameters of the nonlinear prediction model;the non-linear relationship model was highly correlated;the relative errors between the measured value and the predicted value of prediction parameters could be controlled below 10%.Thus,using soil conventional physical and chemical parameters to predict nonlinearly thawing soil water infiltration parameter is feasible,which can provide technical support for the winter storage irrigation in seasonally frozen districts.

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