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Variability of surface fluxes over a heterogeneous semi-arid grassland

Description: Efforts are increasing throughout the research community to improve the predictive capabilities of general circulation models (GCMs). The US Department of Energy's Atmospheric Radiation Measurement (ARM) program has stated its goals as improving the representation and parameterization of cloud radiative forcing and feedbacks in GCMs by a combined modeling and experimental approach. Along with ambient atmospheric conditions, including advection of water vapor and cloud nuclei from other regions,… more
Date: January 1, 1991
Creator: Barnes, F.J.; Porch, W.; Cooper, D. (Los Alamos National Lab., NM (United States)); Kunkel, K.E. (Illinois Univ., Urbana, IL (United States)); Hipps, L. & Swiatek, E. (Utah State Univ., Logan, UT (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Installation restoration program: Hydrologic measurements with an estimated hydrologic budget for the Joliet Army Ammunition Plant, Joliet, Illinois. [Contains maps of monitoring well locations, topography and hydrologic basins]

Description: Hydrologic data were gathered from the 36.8-mi{sup 2} Joliet Army Ammunition Plant (JAAP) located in Joliet, Illinois. Surface water levels were measured continuously, and groundwater levels were measured monthly. The resulting information was entered into a database that could be used as part of numerical flow model validation for the site. Deep sandstone aquifers supply much of the water in the JAAP region. These aquifers are successively overlain by confining shales and a dolomite aquifer of… more
Date: July 1, 1991
Creator: Diodato, D. M.; Cho, H. E. & Sundell, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Tritium migration studies at the Nevada Test Site

Description: Emanation of tritium from waste containers is a commonly known phenomenon. Release of tritium from buried waste packages was anticipated, therefore a research program was developed to study both the rate of tritium release from buried containers and subsequent migration of tritium through soil. Migration of tritium away from low level radioactive wastes buried in Area 5 of the Nevada Test Site was studied. Four distinct disposal events were investigated. The oldest burial event studied was a 19… more
Date: August 1, 1991
Creator: Schulz, R. K.; Romney, E. M.; Fujii, L. M.; Greger, P. D.; Kendall, E. W. & Hunter, R.B. (Reynolds Electrical and Engineering Co., Inc., Las Vegas, NV (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annual dynamics within the active layer

Description: We have continued our meteorological and hydrologic data collection in support of our process-oriented research. The six years of data collected to date is unique in its scope and continuity in a North Hemisphere Arctic setting. This valuable data base has allowed us to further our understanding of the interconnections and interactions between the atmosphere/hydrosphere/biosphere/lithosphere. The increased understanding of the heat and mass transfer processes has allowed us to increase our mode… more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative simulations of a two-layer landfill barrier using the HELP Version 2. 0 and UNSAT-H Version 2. 0 computer codes

Description: This report documents the results of a simulation of the performance of a two-layer infiltration barrier for a nonradioactive dangerous waste landfill (NRDWL) at the US Department of Energy's Hanford Site in semi-arid southeast Washington State. The performance of the barrier was simulated for a period of 10 years using the UNSAT-H version 2.0 groundwater flow computer code. Pacific Northwest Laboratory performed this simulation to compare results using UNSAT-H 2.0 with those of the US Env… more
Date: January 1, 1991
Creator: Nichols, W.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Annual dynamics within the active layer. Annual progress report, March 15, 1990--March 14, 1991

Description: We have continued our meteorological and hydrologic data collection in support of our process-oriented research. The six years of data collected to date is unique in its scope and continuity in a North Hemisphere Arctic setting. This valuable data base has allowed us to further our understanding of the interconnections and interactions between the atmosphere/hydrosphere/biosphere/lithosphere. The increased understanding of the heat and mass transfer processes has allowed us to increase our mode… more
Date: December 31, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An evaluation of evidence pertaining to the origin of vein deposits exposed in Trench 14, Nevada Test Site, Nevada

Description: Large vein-like deposits of calcite and opaline silica that infill the Bow Ridge fault are exposed by Trench 14 at the Nevada Test Site. The origin of the deposits has been the center of considerable controversy because the deposits occur on the edge of Yucca Mountain, which is being characterized geologically as a possible site for the nation`s first high level nuclear waste repository, and the various proposed modes of origin have differing implications for the performance of a geologic repos… more
Date: May 1, 1991
Creator: Stuckless, J.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Atmospheric measurements using a scanning, solar-blind Raman Lidar

Description: The study of the water cycle by Lidar has many applications. Because micro-scale structures can be identified by their water content, the technique offers new opportunities to visualize and study the phenomena. There are applications to many practical problems in agricultural and water management as well as at waste storage sites. Conventional point sensors are limited and are inappropriate for use in complex terrain or varied vegetation and cannot be extrapolated over even modest ranges. To th… more
Date: January 1, 1991
Creator: Eichinger, W. E.; Cooper, D. I.; Holtkamp, D. B.; Karl, R. R., Jr.; Quick, C. R. & Tiee, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

VAM2D: Variably saturated analysis model in two dimensions

Description: This report documents a two-dimensional finite element model, VAM2D, developed to simulate water flow and solute transport in variably saturated porous media. Both flow and transport simulation can be handled concurrently or sequentially. The formulation of the governing equations and the numerical procedures used in the code are presented. The flow equation is approximated using the Galerkin finite element method. Nonlinear soil moisture characteristics and atmospheric boundary conditions (e.g… more
Date: October 1, 1991
Creator: Huyakorn, P. S.; Kool, J. B. & Wu, Y. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

(Plant growth with limited water)

Description: The work supported by DOE in the last year built on our earlier findings that stem growth in soybean subjected to limited water is inhibited first by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. With time, there is modest recovery in extensibility and a 28kD protein accumulates in the walls of the growth-affected cells. A 31kD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the … more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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