4 Matching Results

Search Results

Advanced search parameters have been applied.

Irrigation data base for Arizona

Description: Determining the locations in the U.S. where solar energy might be used for irrigation was proposed. One of the first steps in determining these locations is to establish a data base for the agricultural states that extensively use irrigation. The data base must include information on the crops grown, the irrigation wells, and the irrigation pumps. The results of an effort to establish such a data base for the state of Arizona are presented.
Date: January 1, 1978
Creator: Hall, I.J. & Vandevender, S.G.
Partner: UNT Libraries Government Documents Department

Estimating monthly means of daily totals of direct normal solar radiation and of total solar radiation on a south-facing, 45/sup 0/, tilted surface

Description: Direct Normal, DN, radiation data is presently available for only a few sites in the country while total horizontal, TH, radiation is available for many locations. If a mathematical function relating DN and TH were established, solar engineers could estimate DN for any site for which TH data is available. Total radiated energy on a tilted surface, TT, is also of interest to solar engineers. A recently completed report includes TT values for a surface tilted at 45/sup 0/ for 26 sites. A function relating TT and TH would permit one to estimate TT for sites where only TH data is available. Empirically derived functions relating DN and TH and TT and TH are presented.
Date: July 1, 1977
Creator: Boes, E.C. & Hall, I.J.
Partner: UNT Libraries Government Documents Department

Statistical analysis of hydrologic data for Yucca Mountain; Yucca Mountain Site Characterization Project

Description: The geologic formations in the unsaturated zone at Yucca Mountain are currently being studied as the host rock for a potential radioactive waste repository. Data from several drill holes have been collected to provide the preliminary information needed for planning site characterization for the Yucca Mountain Project. Hydrologic properties have been measured on the core samples and the variables analyzed here are thought to be important in the determination of groundwater travel times. This report presents a statistical analysis of four hydrologic variables: saturated-matrix hydraulic conductivity, maximum moisture content, suction head, and calculated groundwater travel time. It is important to modelers to have as much information about the distribution of values of these variables as can be obtained from the data. The approach taken in this investigation is to (1) identify regions at the Yucca Mountain site that, according to the data, are distinctly different; (2) estimate the means and variances within these regions; (3) examine the relationships among the variables; and (4) investigate alternative statistical methods that might be applicable when more data become available. The five different functional stratigraphic units at three different locations are compared and grouped into relatively homogeneous regions. Within these regions, the expected values and variances associated with core samples of different sizes are estimated. The results provide a rough estimate of the distribution of hydrologic variables for small core sections within each region.
Date: February 1, 1992
Creator: Rutherford, B.M.; Hall, I.J.; Peters, R.R.; Easterling, R.G. & Klavetter, E.A.
Partner: UNT Libraries Government Documents Department