干旱区生态环境知识资源中心(Arid): Data from a Thick Unsaturated Zone in Joshua Tree, San Bernardino County, California, 2007-09.

Arid

报告编号	PB2013107012
	Data from a Thick Unsaturated Zone in Joshua Tree, San Bernardino County, California, 2007-09.
	Burgess, M; Izbicki, J; Teague, N; O’Leary, D; Clark, D.
英文摘要	Data were collected on the physical properties of unsaturated alluvial deposits, the chemical composition of leachate extracted from unsaturated alluvial deposits, the chemical and isotopic composition of groundwater and unsaturated-zone water, and the chemical composition of unsaturated-zone gas at four monitoring sites in the southwestern part of the Mojave Desert in the town of Joshua Tree, San Bernardino County, California. The presence of denitrifying and nitrate-reducing bacteria from unsaturated alluvial deposits was evaluated for two of these monitoring sites that underlie unsewered residential development. Four unsaturated-zone monitoring sites were installed in the Joshua Tree area--two in an unsewered residential development and two adjacent to a proposed artificial-recharge site in an undeveloped area. The two boreholes in residential development areas were installed by using the ODEX air-hammer method. One borehole was drilled through the unsaturated zone to a depth of 541 ft (feet) below land surface; a well screened across the water table was installed. Groundwater was sampled from this well. The second borehole was drilled to a depth of 81 ft below land surface. Drilling procedures, lithologic and geophysical data, construction details, and instrumentation placed in these boreholes are described. Core material was analyzed for water content, bulk density, matric potential, particle size, and water retention. The leachate from over 500 subsamples of cores and cuttings was analyzed for soluble anions, including fluoride, sulfate, bromide, chloride, nitrate, nitrite, and orthophosphate. Groundwater was analyzed for major ions, inorganic compounds, select trace elements, and isotopic composition. Unsaturated-zone water from suction-cup lysimeters was analyzed for major ions, inorganic compounds, select trace elements, and isotopic composition. Unsaturated-zone gas samples were analyzed for argon, oxygen, nitrogen, methane, carbon dioxide, ethane, nitrous oxide, and carbon monoxide. Drill cuttings were analyzed for denitrifying and nitrate-reducing bacteria.
英文关键词	Alluvial deposits Chemical composition Ground water Boreholes Drilling Geophysical surveys Leachates Lithology Nitrates Trace elements Water content Water pollution sampling Water retention Wells Joshua Tree(California) San B
出版年	2013
语种	英语
国家	United States
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=5a003eef31c97d1c38978c2a
来源机构	United States Geological Survey
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/273912
推荐引用方式 GB/T 7714	Burgess, M,Izbicki, J,Teague, N,et al. Data from a Thick Unsaturated Zone in Joshua Tree, San Bernardino County, California, 2007-09.,2013.