干旱区生态环境知识资源中心(Arid): Estimation of natural ground water recharge for the performance assessment of a low-level waste disposal facility at the Hanford Site

Arid

DOI	10.2172/46664
报告编号	PNL--10508
来源ID	OSTI_ID: 46664
	Estimation of natural ground water recharge for the performance assessment of a low-level waste disposal facility at the Hanford Site
	Rockhold, M.L.; Fayer, M.J.; Kincaid, C.T.; Gee, G.W.
英文摘要	In 1994, the Pacific Northwest Laboratory (PNL) initiated the Recharge Task, under the PNL Vitrification Technology Development (PVTD) project, to assist Westinghouse Hanford Company (WHC) in designing and assessing the performance of a low-level waste (LLW) disposal facility for the US Department of Energy (DOE). The Recharge Task was established to address the issue of ground water recharge in and around the LLW facility and throughout the Hanford Site as it affects the unconfined aquifer under the facility. The objectives of this report are to summarize the current knowledge of natural ground water recharge at the Hanford Site and to outline the work that must be completed in order to provide defensible estimates of recharge for use in the performance assessment of this LLW disposal facility. Recharge studies at the Hanford Site indicate that recharge rates are highly variable, ranging from nearly zero to greater than 100 mm/yr depending on precipitation, vegetative cover, and soil types. Coarse-textured soils without plants yielded the greatest recharge. Finer-textured soils, with or without plants, yielded the least. Lysimeters provided accurate, short-term measurements of recharge as well as water-balance data for the soil-atmosphere interface and root zone. Tracers provided estimates of longer-term average recharge rates in undisturbed settings. Numerical models demonstrated the sensitivity of recharge rates to different processes and forecast recharge rates for different conditions. All of these tools (lysimetry, tracers, and numerical models) are considered vital to the development of defensible estimates of natural ground water recharge rates for the performance assessment of a LLW disposal facility at the Hanford Site.
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 ; HANFORD RESERVATION ; RADIOACTIVE WASTE DISPOSAL ; LOW-LEVEL RADIOACTIVE WASTES ; GROUNDWATER RECHARGE ; MATHEMATICAL MODELS ; RADIONUCLIDE MIGRATION ; COMPILED DATA
URL	http://www.osti.gov/scitech/servlets/purl/46664
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/266046
推荐引用方式 GB/T 7714	Rockhold, M.L.,Fayer, M.J.,Kincaid, C.T.,et al. Estimation of natural ground water recharge for the performance assessment of a low-level waste disposal facility at the Hanford Site,1995.