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Drought in the United States: Causes and Current Understanding

Description: This report discusses how drought is defined (e.g., why drought in one region of the country is different from drought in another region) and why drought occurs in the United States. It briefly describes periods of drought in the country's past that equaled or exceeded drought conditions experienced during the 20th century. This is followed by a discussion of the nature and extent of recent droughts that affected Texas and the U.S. midcontinent, and the current drought in California. Lastly, th… more
Date: February 26, 2014
Creator: Folger, Peter & Cody, Betsy A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transplanting native dominant plants to facilitate community development in restored coastal plain wetlands.

Description: Abstract: Drained depressional wetlands are typically restored by plugging ditches or breaking drainage tiles to allow recovery of natural ponding regimes, while relying on passive recolonization from seed banks and dispersal to establish emergent vegetation. However, in restored depressions of the southeastern United States Coastal Plain, certain characteristic rhizomatous graminoid species may not recolonize because they are dispersal-limited and uncommon or absent in the seed banks of distur… more
Date: December 1, 2007
Creator: De Steven, Diane & Sharitz, Rebecca R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Use of Produced Water in Recirculated Cooling Systems at Power Generating Facilities

Description: Tree ring studies indicate that, for the greater part of the last three decades, New Mexico has been relatively 'wet' compared to the long-term historical norm. However, during the last several years, New Mexico has experienced a severe drought. Some researchers are predicting a return of very dry weather over the next 30 to 40 years. Concern over the drought has spurred interest in evaluating the use of otherwise unusable saline waters to supplement current fresh water supplies for power plant… more
Date: June 30, 2006
Creator: McGowin, C.; DiFilippo, M. & Weintraub, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Errata Sheet for Post-Closure Inspection and Monitoring Report for Corrective Action Unit 110: Area 3 WMD U-3ax/bl Crater, Nevada Test Site, Nevada

Description: The last sentence of the second paragraph of the Executive Summary on page ix incorrectly states the period for repair. Cracks or areas of settling exceeding the 15 centimeters (6 inches) deep that extend 1.0 meter (3 feet) or more on the cover will be evaluated and repaired within 60 days of detection. The second sentence of the third paragraph of the Executive Summary on page ix incorrectly states the month that cover repair was performed while omitting the discovery of additional settling, w… more
Date: September 13, 2007
Creator: National Security Technologies, LLC
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessing Security Needs of the multifaceted relationships of Energy and Water Providers

Description: In the near future, the United States will be facing constraints on energy availability due to the heightened demand for both energy and water, especially during droughts and summers. Increasing stress on the inextricably linked resource availability of both water and energy can be mitigated with integrated planning. Exchanging data is an important component to current and future mitigation approaches within the Energy-Water Nexus. We describe the types of relationships that are formed in the U… more
Date: August 22, 2007
Creator: Goldstein, N.; Newmark, R.; Burton, L.; May, D.; McMahon, J.; Whitehead, C. D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The winds of Fermilab

Description: The drought of 1988 caused the operations group to become concerned about the rate of evaporation from the Main Ring cooling ponds. They needed a way to data-log windspeed and direction. They had an old broken Heathkit weather station. The anemometer and windvane were salvaged and repaired. An interface to two MADC channels on the PBAR CAMAC link was built on an old piece of CAMAC card with salvaged parts. The project cost nothing. It has been in service since January 1989.
Date: December 6, 1990
Creator: Tomlin, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of tree toxicity near the F- and H-Area seepage basins of the Savannah River Site

Description: Areas of tree mortality, originating in 1979, have been documented downslope of the F- and H-Area Seepage Basins. The basins were used as discharge areas for low-level radioactive and nonradioactive waste. Preliminary studies indicated that there are three possible causes of stress: altered hydrology; hazardous chemicals; and nonhazardous chemicals. It was originally hypothesized that the most likely hydrological stressors to Nyssa sylvatica var. biflora were flooding where water levels cover t… more
Date: December 1, 1990
Creator: Loehle, C. (ed.) (Westinghouse Savannah River Co., Aiken, SC (USA)); Richardson, C.J. (ed.); Greenwood, K.P.; Hane, M.E. & Lander, A.J. (Duke Univ., Durham, NC (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water use, productivity and interactions among desert plants

Description: Productivity, stability, and competitive interactions among ecosystem components within aridlands are key processes related directly to water in deserts. This project assumes that integrated aspects of plant metabolism provide insight into the structure and function of plant communities and ecosystems. While it is difficult to extrapolate from instantaneous physiological observations to higher scales, such as whole plant performance or to the interactions between plants as components of ecosyst… more
Date: November 17, 1992
Creator: Ehleringer, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drought in the United States: Causes and Issues for Congress

Description: This report defines drought and discusses its background and cause in the United States. It looks in detail at the 2007-2009 California drought as well as drought in the American West in general. Lastly, it discusses the future of U.S. drought and how congressional policy can affect drought.
Date: June 12, 2012
Creator: Folger, Peter; Cody, Betsy A. & Carter, Nicole T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comment on ''Sensitivity Analysis and Determination of Streambed Leakance and Aquifer Hydraulic Properties'' by Xunhong Chen and Xi Chen, Journal of Hydrology, 2003, v.284, 270-284

Description: Recently, studies of the Platte River watershed have gained significant attention from federal and Nebraska, USA, state agencies due to the importance of groundwater/surface-water interactions under drought conditions. Using archive data from a 1983 pumping test, Chen and Chen (2003) interpret the hydraulic properties of the alluvium and a streambed of the Platte River near Kearney, Nebraska, and compare their data with results of other studies performed over the past several years. Three impor… more
Date: May 17, 2004
Creator: Kollet, S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of Drought Impacts on Electricity Production in the Western and Texas Interconnections of the United States.

Description: Electricity generation relies heavily on water resources and their availability. To examine the interdependence of energy and water in the electricity context, the impacts of a severe drought to assess the risk posed by drought to electricity generation within the western and Texas interconnections has been examined. The historical drought patterns in the western United States were analyzed, and the risk posed by drought to electricity generation within the region was evaluated. The results of … more
Date: February 9, 2012
Creator: Harto, C. B.; Yan, Y. E.; Demissie, Y. K.; Elcock, D.; Tidwell, V. C.; Hallett, K. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

(Plant growth with limited water)

Description: When water is in short supply, soybean stem growth is inhibited by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. The extensibility then becomes the main limitation. With time, there is a modest recovery in extensibility along with an accumulation of a 28kD protein in the walls of the growth-affected cells. A 3lkD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the walls of the st… more
Date: January 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Role of Disturbance in Dry Tropical Forest Landscapes

Description: Disturbance can be defined as 'any relatively discrete event in time that disrupts ecosystem, community, or population structure and changes resources, substrate availability, or the physical environment'. This definition requires that the spatial and temporal scales of the system and disturbance be determined. Disturbances are typically characterized by their size, spatial distribution, frequency or return time, predictability, and magnitude (which includes both intensity and severity). These … more
Date: January 1, 2011
Creator: Dale, Virginia H.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

EFFECT OF CLIMATE CHANGE ON WATERSHED RUNOFF FLOW - UPPER COOSA RIVER BASIN UPSTREAM FROM PLANT HAMMOND

Description: The ability of water managers to maintain adequate supplies in the coming decades depends on future weather conditions, as climate change has the potential to reduce stream flows from their current values due to potentially less precipitation and higher temperatures, and possibly rendering them unable to meet demand. The upper Coosa River basin, located in northwest Georgia, plays an important role in supplying water for industry and domestic use in northern Georgia, and has been involved in wa… more
Date: October 24, 2011
Creator: Chen, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dust Bowl migration as an analog for possible global warming-induced migration from Mexico

Description: As a result of increases in CO{sub 2} and other radiatively important trace gases, scientists have predicted increases in mean worldwide temperatures of 2--5 degrees C over the next 50 to 100 years. Such temperature increases may result in climate modifications that would in turn be associated with increases in drought and desertification and could even change the patterns of the monsoons and tropical rains, which are important to agriculture throughout the world. They predicted that the rise i… more
Date: June 1, 1994
Creator: Turner, M. H.; Longstreth, J. D.; Johnson, A. K. & Rosenberg, N. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[Plant growth with limited water]. Performance report

Description: When water is in short supply, soybean stem growth is inhibited by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. The extensibility then becomes the main limitation. With time, there is a modest recovery in extensibility along with an accumulation of a 28kD protein in the walls of the growth-affected cells. A 3lkD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the walls of the st… more
Date: October 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Energy and water sector policy strategies for drought mitigation.

Description: Tensions between the energy and water sectors occur when demand for electric power is high and water supply levels are low. There are several regions of the country, such as the western and southwestern states, where the confluence of energy and water is always strained due to population growth. However, for much of the country, this tension occurs at particular times of year (e.g., summer) or when a region is suffering from drought conditions. This report discusses prior work on the interdepen… more
Date: March 1, 2009
Creator: Kelic, Andjelka; Vugrin, Eric D.; Loose, Verne W. & Vargas, Vanessa N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A dynamic soil chamber system coupled with a tunable diode laser for online measurements of delta-13C, delta-18O, and efflux rate of soil respired CO2

Description: High frequency observations of the stable isotopic composition of CO(2) effluxes from soil have been sparse due in part to measurement challenges. We have developed an open-system method that utilizes a flow-through chamber coupled to a tunable diode laser (TDL) to quantify the rate of soil CO(2) efflux and its delta(13)C and delta(18)O values (delta(13)C(R) and delta(18)O(R), respectively). We tested the method first in the laboratory using an artificial soil test column and then in a semi-ari… more
Date: January 1, 2009
Creator: Powers, Heath H; Mcdowell, Nate; Hanson, David & Hunt, John
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydrological consequences of global warming

Description: The 2007 Intergovernmental Panel for Climate Change indicates there is strong evidence that the atmospheric concentration of carbon dioxide far exceeds the natural range over the last 650,000 years, and this recent warming of the climate system is unequivocal, resulting in more frequent extreme precipitation events, earlier snowmelt runoff, increased winter flood likelihoods, increased and widespread melting of snow and ice, longer and more widespread droughts, and rising sea level. The effects… more
Date: June 1, 2009
Creator: Miller, Norman L.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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