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DOI	10.2172/663394
报告编号	USGS/WRIR--97-4052
来源ID	OSTI_ID: 663394
	An estimated potentiometric surface of the Death Valley region, Nevada and California, developed using geographic information system and automated interpolation techniques
	D`Agnese, F.A.; Faunt, C.C.; Turner, A.K.
英文摘要	An estimated potentiometric surface was constructed for the Death Valley region, Nevada and California, from numerous, disparate data sets. The potentiometric surface was required for conceptualization of the ground-water flow system and for construction of a numerical model to aid in the regional characterization for the Yucca Mountain repository. Because accurate, manual extrapolation of potentiometric levels over large distances is difficult, a geographic-information-system method was developed to incorporate available data and apply hydrogeologic rules during contour construction. Altitudes of lakes, springs, and wetlands, interpreted as areas where the potentiometric surface intercepts the land surface, were combined with water levels from well data. Because interpreted ground-water recharge and discharge areas commonly coincide with groundwater basin boundaries, these areas also were used to constrain a gridding algorithm and to appropriately place local maxima and minima in the potentiometric-surface map. The resulting initial potentiometric surface was examined to define areas where the algorithm incorrectly extrapolated the potentiometric surface above the land surface. A map of low-permeability rocks overlaid on the potentiometric surface also indicated areas that required editing based on hydrogeologic reasoning. An interactive editor was used to adjust generated contours to better represent the natural water table conditions, such as large hydraulic gradients and troughs, or ``vees``. The resulting estimated potentiometric-surface map agreed well with previously constructed maps. Potentiometric-surface characteristics including potentiometric-surface mounds and depressions, surface troughs, and large hydraulic gradients were described.
出版年	1998
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	58 GEOSCIENCES ; 05 NUCLEAR FUELS ; NEVADA ; CALIFORNIA ; GEOGRAPHY ; HYDROLOGY ; GROUND WATER ; YUCCA MOUNTAIN ; RADIOACTIVE WASTE FACILITIES ; SITE CHARACTERIZATION ; PERMEABILITY ; GROUNDWATER RECHARGE ; SURFACE WATERS ; MAPS
URL	http://www.osti.gov/scitech/servlets/purl/663394
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/267558
推荐引用方式 GB/T 7714	D`Agnese, F.A.,Faunt, C.C.,Turner, A.K.. An estimated potentiometric surface of the Death Valley region, Nevada and California, developed using geographic information system and automated interpolation techniques,1998.