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in subjects: "Surface Waters"

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Inversion approach for thermal data from a convecting hydrothermal system. Revision 1

Hydrothermal systems are often studied by collecting thermal gradient data and temperature-depth curves. These data contain important information about the flow field, the evolution of the hydrothermal system, and the location and nature of the ultimate heat sources. Thermal data are conventionally interpreted by the ''forward'' method; the thermal field is calculated based on selected initial conditions and boundary conditions such as temperature and permeability distributions. If the calculat… more

Date: June 7, 1985

Creator: Kasameyer, P.; Younker, L. & Hanson, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Radiochemical analysis using Empore{trademark} Rad Disks.

A solid-phase extraction technique that isolates specific radionuclides (i.e., {sup 89/90}Sr, {sup 226/228}Ra, {sup 99}Tc) from surface, ground, and drinking waters is described. The analyte is isolated by pulling a sample through an appropriate Empore{trademark} Rad Disk with a vacuum, and the disk is subsequently assayed by a suitable counting technique. The method has both laboratory and field applications. Interferences are discussed.

Date: June 7, 1999

Creator: Smith, L. L.