MODFLOW-2000, the U.S. Geological Survey Modular Ground-Water Model -Documentation of the Hydrogeologic-Unit Flow (HUF) Package
MODFLOW-2000, the U.S. Geological Survey Modular Ground-Water Model -Documentation of the Hydrogeologic-Unit Flow (HUF) Package
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MODFLOW-2000，美国地质调查局模块化地下水模型 - 水文地质单元流 (HUF) 包的文档
DOI：
10.3133/ofr00342
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Hill
中科院分区：
文献类型：
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作者：
E. Anderman;M. Hill
本报告记录了地下水模拟计算机程序MODFLOW-2000的水文地质单位流（HUF）包。HUF软件包是一个备选的内部流程软件包，允许在模型中使用水文地质单位明确定义系统水文地质的垂直几何形状，水文地质单位可能与模型层的定义不同。HUF软件包适用于MODFLOW-2000的所有进程。对于地下水流过程，HUF软件包根据用户使用参数定义的水文地质单元的水力特性计算模型层的有效水力特性。水力学特性用于计算传导系数和求解地下水流方程所需的其他项。模型对HUF软件包输入文件中定义的参数的敏感度可以使用敏感度过程，使用观察过程定义的观察值来计算。参数的最佳值可以通过使用参数估计过程来估计。HUF软件包与层特性流（LPF）软件包几乎相同，主要区别在于系统水文地质垂直几何的定义。HUF软件包的使用在两个测试案例中进行了说明，这两个测试案例还通过显示参数估计过程在使用精确观测时产生真实参数值来验证软件包的性能。1 Calibra Consulting LLC，1776林肯街，Suite 500，Denver，CO 80203，evan@InverseModeling.com 2 U.S. Geological Survey，3215 Marine St.，科罗拉多州博尔德，邮编80303，mchill@usgs.gov。
This report documents the Hydrogeologic-Unit Flow (HUF) Package for the groundwater modeling computer program MODFLOW-2000. The HUF Package is an alternative internal flow package that allows the vertical geometry of the system hydrogeology to be defined explicitly within the model using hydrogeologic units that can be different than the definition of the model layers. The HUF Package works with all the processes of MODFLOW-2000. For the Ground-Water Flow Process, the HUF Package calculates effective hydraulic properties for the model layers based on the hydraulic properties of the hydrogeologic units, which are defined by the user using parameters. The hydraulic properties are used to calculate the conductance coefficients and other terms needed to solve the ground-water flow equation. The sensitivity of the model to the parameters defined within the HUF Package input file can be calculated using the Sensitivity Process, using observations defined with the Observation Process. Optimal values of the parameters can be estimated by using the Parameter-Estimation Process. The HUF Package is nearly identical to the Layer-Property Flow (LPF) Package, the major difference being the definition of the vertical geometry of the system hydrogeology. Use of the HUF Package is illustrated in two test cases, which also serve to verify the performance of the package by showing that the Parameter-Estimation Process produces the true parameter values when exact observations are used. 1 Calibra Consulting LLC, 1776 Lincoln St., Suite 500, Denver, CO 80203, evan@InverseModeling.com 2 U.S. Geological Survey, 3215 Marine St., Boulder, CO 80303, mchill@usgs.gov.