一维水分运移模型水力参数敏感性分析  

Sensitivity Analysis of Hydraulic Parameters of One-dimensional Moisture Migration Model

作　　者：刘明明 段磊[1,2] 张琛[1,2] 宋浩[1,2] 吕婷婷[1,2] 霍世璐 LIU Ming-ming;DUAN Lei;ZHANG Chen;SONG Hao;LU Ting-ting;HUO Shi(College of Environmental Science and Engineering,Chang'an University,Xi'an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education,Arid Area,Xi'an 710054,China)

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]旱区地下水文与生态效应教育部重点实验室,西安710054

出　　处：《中国农村水利水电》2019年第5期131-135,共5页China Rural Water and Hydropower

基　　金："伊犁河谷西部平原区1:5万水文地质调查"(12120101100015002);国家自然科学基金项目(U1603243);国家自然科学基金项目(41230314)

摘　　要：利用数值模拟方法模拟灌溉水入渗补给地下水的过程中,模型参数的不确定性是影响包气带水分运移的关键因素。因此,为了定量分析水力参数的不确性对剖面含水率空间分布的影响。基于新疆伊犁霍城县原位试验场灌溉实验,以剖面含水率为研究对象,运用HYDRUS软件建立一维非饱和数值模型,利用局部分析方法,研究水力参数空间不确定性对剖面含水率的影响,并对水力参数的敏感指数进行分析与对比。研究表明:非均质岩层中,细颗粒中θs和n对剖面含水率影响最大,在粗颗粒中,θr对剖面含水率影响最大。In the process of simulating the infiltration of irrigation water into groundwater by numerical simulation, the uncertainty of the model parameters is a key factor affecting the moisture migration in the unsaturated zone. Therefore, in order to quantitatively analyze the influence of the uncertainty of the hydraulic parameters on the spatial distribution of the profile moisture content. Based on the irrigation experiment in Huocheng County in Ili, Xinjiang, this paper uses the HYDRUS software to establish a one-dimensional non-saturated numerical model and uses the partial analysis method to study the spatial uncertainty of the hydraulic parameters. The impact and sensitivity index of the parameters are analyzed and compared. Studies have shown that in heterogeneous rock formations, the fine particle neutralization has the greatest effect on the moisture content of the profile, and in the coarse grains, it has the greatest effect on the profile moisture content.

关 键 词：水力参数 敏感性分析 非均质岩层 含水率空间分布 

分 类 号：TV93[水利工程—水利水电工程] P641[天文地球—地质矿产勘探]