干旱区生态环境知识资源中心(Arid): Groundwater flow near the Shoal Site, Sand Springs Range, Nevada: Impact of density-driven flow

Arid

DOI	10.2172/10117392
报告编号	DOE/NV/10845--51
来源ID	OSTI_ID: 10117392
	Groundwater flow near the Shoal Site, Sand Springs Range, Nevada: Impact of density-driven flow
	Chapman, J.; Mihevc, T.; McKay, A.
英文摘要	The nature of flow from a highland recharge area in a mountain range in north-central Nevada to discharge areas on either side of the range is evaluated to refine a conceptual model of contaminant transport from an underground nuclear test conducted beneath the range. The test, known as the Shoal event, was conducted in 1963 in granitic rocks of the Sand Springs Range. Sparse hydraulic head measurements from the early 1960s suggest flow from the shot location to the east to Fairview Valley, while hydrochemistry supports flow to salt pans in Fourmile Flat to the west. Chemical and isotopic data collected from water samples and during well-logging arc best explained by a reflux brine system on the west side of the Sand Springs Range, rather than a typical local flow system where all flow occurs from recharge areas in the highlands to a central discharge area in a playa. Instead, dense saline water from the playa is apparently being driven toward the range by density contrasts. The data collected between the range and Fourmile Flat suggest the groundwater is a mixture of younger, fresher recharge water with older brine. Chemical contrasts between groundwater in the east and west valleys reflect the absence of re-flux water in Fairview Valley because the regional discharge area is distant and thus there is no accumulation of salts. The refluxing hydraulic system probably developed after the end of the last pluvial period and differences between the location of the groundwater divide based on hydraulic and chemical indicators could reflect movement of the divide as the groundwater system adjusts to the new reflux condition.
出版年	1994
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE ; GROUND WATER ; LIQUID FLOW ; EVALUATION ; NEVADA ; UNDERGROUND EXPLOSIONS ; NUCLEAR EXPLOSIONS ; RADIOISOTOPES ; ENVIRONMENTAL TRANSPORT ; GRANITES 540230 ; 450200 ; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT ; NUCLEAR EXPLOSIONS AND EXPLOSIVES
URL	http://www.osti.gov/scitech/servlets/purl/10117392
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/265777
推荐引用方式 GB/T 7714	Chapman, J.,Mihevc, T.,McKay, A.. Groundwater flow near the Shoal Site, Sand Springs Range, Nevada: Impact of density-driven flow,1994.