干旱区生态环境知识资源中心(Arid): PolyRES: A polygon-based Richards equation solver

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DOI	10.2172/179180
报告编号	NUREG/CR--6366; PNL--10709
来源ID	OSTI_ID: 179180
	PolyRES: A polygon-based Richards equation solver
	Hills, R.G. [New Mexico State Univ., Las Cruces, NM (United States). Dept. of Mechanical Engineering]; Meyer, P.D.; Rockhold, M.L. [Pacific Northwest Lab., Richland, WA (United States)]
英文摘要	This document describes the theory, implementation, and use of a software package designed to solve the transient, two-dimensional, Richards equation for water flow in unsaturated-saturated soils. This package was specifically designed to model complex geometries with minimal input from the user and to simulate groundwater flow related to assessment of low-level radioactive waste disposal sites and engineered facilities. The spatial variation of the hydraulic properties can be defined across individual polygon-shaped subdomains, called objects. These objects combine to form a polygon-shaped model domain. Each object can have its own distribution of hydraulic parameters. The resulting model domain and polygon-shaped internal objects are mapped onto a rectangular, finite-volume, computational grid by a preprocessor. This allows the user to specify model geometry independently of the underlying grid and greatly simplifies user input for complex geometries. In addition, this approach significantly reduces the computational requirements since complex geometries are actually modeled on a rectangular grid. This results in well-structured, finite difference-like systems of equations that require minimal storage and are very efficient to solve. The documentation for this software package includes a user`s manual, a detailed description of the underlying theory, and a detailed discussion of program flow. Several example problems are presented that show the use and features of the software package. The water flow predictions for several of these example problems are compared to those of another algorithm to test for prediction equivalency.
出版年	1995
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	05 NUCLEAR FUELS ; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS ; RADIOACTIVE WASTE FACILITIES ; HYDROLOGY ; GROUND WATER ; FLOW MODELS ; P CODES ; MANUALS ; POROUS MATERIALS ; RADIOACTIVE WASTE DISPOSAL ; UNDERGROUND DISPOSAL ; LOW-LEVEL RADIOACTIVE WASTES ; HYDRAULIC CONDUCTIVITY ; COMPUTER PROGRAM DOCUMENTATION ; SOIL MECHANICS ; COVERINGS
URL	http://www.osti.gov/scitech/servlets/purl/179180
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266432
推荐引用方式 GB/T 7714	Hills, R.G. [New Mexico State Univ., Las Cruces, NM ,Meyer, P.D.,Rockhold, M.L. [Pacific Northwest Lab., Richland, WA . PolyRES: A polygon-based Richards equation solver,1995.