The National Geothermal Data System (NGDS) is a DOE-funded distributed network of databases and data sites that collectively form a system for the acquisition, management and maintenance of geothermal and related data. Much of the risk of geothermal energy development is associated with exploring for, confirming and characterizing the available geothermal resources. The overriding purpose of the NGDS is to help mitigate this up-front risk by serving as a central repository for geothermal and relevant related data as well as a link to distributed data sources. By helping with the process of assessing and categorizing the nation's geothermal resources, providing strategies and tools for financial risk assessment, and by consolidating all geothermal data through a publicly accessible data system the NGDS will support research, stimulate public interest, promote market acceptance and investment, and in turn support the growth of the geothermal industry.
Access to distributed data will eventually be provided through the portals of partner data sites that include, but are not restricted to the NGDS web site. In the future, a desktop application (Geothermal Desktop) will provide both user-based data management as well as access to the NGDS data network. Users of the NGDS system will include federal and state agencies, researchers, decision makers, the public, educational institutions, the geothermal industry and financial institutions. The NGDS is being designed using and adapting existing technology as well as emerging informatics standards, specifications, and protocols to ultimately be able to handle the full range of geoscience and engineering data pertinent to geothermal resources. It will be an easy to use system that will provide resource classification and financial risk assessment tools to help encourage the development of more geothermal resources by industry.
All 50 State geological surveys have committed to integrate their geothermal data to the NGDS. The goal of the State Geothermal Data (Recovery Act: State Geological Survey Contributions to the National Geothermal Data System) is to make large quantities of geothermal-relevant geosciences data held by the State Geological Surveys publicly available via the National Geothermal Data System (NGDS). The objective of the project is to populate, expand and enhance the NGDS by creating a national, sustainable, distributed, interoperable network of predominantly state geological survey-based data providers that will develop, collect, serve, and maintain geothermal relevant data that operates as an integral compliant component of NGDS. < p>State Geothermal Data is a project of the Arizona Geological Survey (AZGS). To learn more please visit the Project Overview page.
The Virginia Department of Mines, Minerals and Energy (DMME) serves a large and varied group of people, organizations and agencies throughout the Commonwealth. Through its six divisions, the agency regulates the mineral industry, provides mineral research and offers advice on wise use of resources. Its programs directly serve the citizens who live near mining operations, mining labor groups, other regulatory agencies, the educational community, the mineral industry, and environmental, consumer and industry special-interest groups.
This is the home page for southeastern United States Geothermal Data at the Regional Geophysics Laboratory in the Department of Geological Sciences at Virginia Polytechnic Institute & State University. Development of this site was funded primarily by the Department of Energy under Agreement Number DE-FG07-96ID13454 to Virginia Tech. The site is useful for those interested in terrestrial heat flow, practical applications of low-temperature geothermal energy, and also provides an excellent temperature versus depth data base for those wanting to do their own calculations to evaluate hypotheses of global warming using a geothermal approach to climate reconstruction. This site is occasionally updated to include temperature data from hundreds of temperature and other geophysical logs, rock thermal conductivity, and heat flow values from New Jersey to Georgia. Datasets can be displayed and/or downloaded for use by the user. Clicking on the items below will provide information on the data available. To browse this page correctly we suggest that you get a copy of the Microsoft Internet Explorer or the Netscape Navigator.
Heat contained within the Earth that can be recovered and put to useful work is called geothermal energy. The heat energy is contained in normal occurrences of subsurface groundwater, which is transported to the surface of the earth by pumping. Low- to moderate-temperature (20oC to 150oC [68oF to 302oF]) geothermal resources in the United States are widespread and are used to provide direct heat for homes and industry. High-temperature (above 150oC [302oF]) geothermal resources in the United States, present primarily in the west, are used in electric power generation. And, throughout the country, the stable temperature of the ground just below the surface can be used by geothermal heat pumps to both heat and cool buildings (geothermal energy). The low- to moderate-temperature geothermal resources constitute an important renewable non-electric power energy resource that is just beginning to be utilized in the eastern United States to heat and cool buildings. As these space-heating applications grow in popularity to include entire residential and industrial complexes instead of just single residential dwellings or buildings, we will need to know more about the deeper (to many kilometers), and therefore hotter, fractured rocks that make up the groundwater plumbing system that cradles the geothermal fluids. The higher the water temperature, the more efficient will be the geothermal resource. Although the groundwater temperatures in the eastern United States are relatively low, it is well known from a thermodynamic standpoint that a lot of warm water at a lower temperature is considerably better from the standpoint of geothermal resource potential than a little water of considerably higher temperature. Thus, the nature and quantity of the deeper and warmer normal groundwater resources needs to be explored and better defined. This web site is dedicated to a description of what we know so far about the data base in the southeastern United States that will allow us to use this renewable resource in the future.
Evidence from Precision Temperature logs for Deep Fracture Permeability in Crystalline Rocks in the Eastern and Southeastern United States
|Regional Geophysics Laboratory, Department of Geosciences, Virginia Polytechnic Institute and State University|
|Comments about this web site to: Costain@vt.edu|
|This geothermal web site can be accessed using either of the following URLs.|
|Last updated: 10/24/2010|
John K. Costain
Department of Geosciences
1046 Derring Hall, Blacksburg, VA 24061-0422