21. CertainTech Corporation > Home Page Specializes in groundwater treatment and hydrogeologic modeling. Also sells modeling and GIS interface software for groundwater analysis. http://www.certaintech.com

Overview Certifications NAICS Codes Careers Information Technology Services Website Development IT Staffing IT Training Environmental Industry Services Technologies CertainTech Corporation provides the best of information technology and environmental sciences, with a unique combination of skills and vision. Our staff have a proven track record in providing quality services and developing state-of-the art and easy-to-use software applications. SurfLink New Version! SiteGIS New Version! Surfer Grapher Strater New! Order Software Return/Cancel Policy

22. Groundwater - WDNR The Department of Natural Resources groundwater Page groundwater Working to protect and preserve the purity and quantity of Wisconsin's groundwater resources for today and future http://www.dnr.state.wi.us/org/water/dwg/gw/

Home About Topics Contact Us ... Groundwater Resources Publications Brochures Education Materials Well Form Software Activities Wellhead Protection Source Water Protection Groundwater Coordinating Council Arsenic Issues Administrative Codes Groundwater Quality Standards Monitoring Well Requirements Data Summaries Staff Directory Quick Links Forms More... Related Sites [Exit DNR] USGS- Water USEPA- Groundwater Groundwater Working to protect and preserve the purity and quantity of Wisconsin's groundwater resources for today and future generations. A Growing Thirst for Groundwater "Where water demand outpaces supply, times warrant a fresh look at a resource considered unfathomable and unending. " June 2004 issue of the Wisconsin Natural Resources Magazine Wisconsin's Buried Treasure - Information about Wisconsin's Groundwater The WDNR Groundwater Section is responsible for implementing Wisconsin's Groundwater Quality Monitoring Well regulatory standards. [Exit DNR] We also develop and implement groundwater programs related to: Groundwater Quantity Wellhead and Source Water Protection Groundwater in Comprehensive Planning Protecting Wisconsin's Groundwater Through Comprehensive Planning [Exit DNR] Comprehensive Planning and Groundwater Fact Sheets Groundwater And Its Role In Comprehensive Planning Resources To Help You Protect Your Drinking Water Supply Residential Development And Groundwater Resources The Groundwater Coordinating Council ... Arsenic Issues More Groundwater Links Publications Data Summaries Learn more Contact:

23. Rigare - Home Page UK based consultants in groundwater and wetland science. Services include investigating and understanding groundwater systems, Hydrogeological Impact Assessments, development of groundwater supply, abstraction licensing and groundwater resource modelling. http://rigare.co.uk

The Company Rigare was established in September 2008 by Dr. Rob Low to provide high-quality, independent, expert consultant and research services in the areas of groundwater and wetland science. The company is based in Cardiff, Wales, and is currently involved in projects throughout the UK and abroad. Our Aims and Values To be ethical and scientifically rigorous To provide high quality technical advice, on time and within budget To think and act to achieve the highest possible environmental standards in all aspects of our work Welcome Our knowledge and experience allow clients to delegate specialist technical work to us with complete confidence, from one-off advice and project management, to expert witness and client representation. We offer competitive rates, and our combined expertise enables us efficiently to identify, assess and deal with the critical issues in any project. In combination, these attributes allow us to offer a cost effective service. Our areas of expertise are summarised in the accompanying pages, and please don’t hesitate to call us to discuss your detailed requirements. Home Page Groundwater Resources Groundwater Modelling Wetland Science ... Contact Details

24. Groundwater Utilization And Sustainability, Sustainability Of Groundwater, Susta EXECUTIVE SUMMARY . The indiscriminate and sometimes excessive use of groundwater has led to questions regarding its sustainability. To what extent can groundwater be exploited http://groundwater.sdsu.edu/

[Water and Groundwater] [Origin of Groundwater] [Age of Groundwater] [Recharge and Discharge] ... [References] Source: U.S. Geological Survey. Fig. 1 In nature, groundwater and surface water are connected. GROUNDWATER UTILIZATION AND SUSTAINABILITY Victor M. Ponce EXECUTIVE SUMMARY Groundwater is the portion of the Earth's water cycle that flows underground. Groundwater originates from precipitation that percolates into the ground. Percolation is the flow of water through soil and porous/fractured rock. The water table separates the saturated, or aquifer zone, from the unsaturated, or vadose zone, where the water does not fill all the voids or spaces in the soil or rock (Fig. 1). The general trend is for water in the unsaturated zone to move downward until it reaches the water table. On the other hand, water in the saturated zone moves primarily along horizontal hydraulic gradients, from higher to lower elevations. The ocean is the natural sink for groundwater flows. [Origin of Groundwater] [Quantity and Quality] [Age of Groundwater] [Recharge and Discharge] ... [Water and Groundwater] Precipitation is the source of all groundwater, new and old. Precipitation that does not form part of surface runoff or remain on the land surface percolates into the ground. Once there, it can follow three distinct paths (Fig. 2): Remain in the unsaturated (vadose) zone subject to capillary action

25. Groundwater (hydrology) -- Britannica Online Encyclopedia groundwater (hydrology), water that occurs below the surface of the Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called http://www.britannica.com/EBchecked/topic/247019/groundwater

document.write(''); Search Site: Advanced Search With all of these words With the exact phrase With any of these words Without these words Home SHOP BROWSE BLOG ... HELP Username: Password: Remember me Forgot your password? Help Email " is the e-mail address you used when you registered. Password " is case sensitive. If you need additional assistance, please contact customer support Enter the e-mail address you used when enrolling for Britannica Premium Service and we will e-mail your password to you. groundwater My Britannica CREATE MY groundwater NEW ARTICLE ... SAVE groundwater Table of Contents: groundwater Article Article Related Articles Related Articles External Web sites External Web sites Citations Article Related Articles External Web sites Citations ARTICLE from the groundwater water that occurs below the surface of the Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called subsurface water to distinguish it from surface water which is found in large bodies like the oceans or lakes, or which flows overland in streams. Both surface and subsurface water are related through the hydrologic cycle (the continuous circulation of water in the Earth-atmosphere system).

26. International Groundwater Resources Assessment Centre - Igrac IGRAC aims to assess the groundwater resources of the world. It is developing a Global groundwater Information System and promoting guidelines and protocols for the assessment of groundwater resources. http://igrac.net

27. Groundwater Introduction. In the broadest sense, groundwater refers to all subsurface water. The term more commonly refers to water beneath the surface of the earth which saturates the pores and http://www.eoearth.org/article/Groundwater

28. Home - NCGRT A research and education venture focusing on processes of groundwater recharge, discharge, contamination, remediation and management. http://groundwater.com.au/

SKIP TO CONTENT Home Search National Centre for Groundwater Research and Training Professor Craig Simmons Director National Centre for Groundwater Research and Training The National Centre for Groundwater Research and Training opens with: $55M in cash funding to recruit personnel and build lasting research infrastructure a collaboration between twelve universities and eight industry and government organisations thirty four of the top groundwater researchers in the nation collaborating on its research programs research programs in South Australia, New South Wales, Queensland, Victoria, Western Australia, and the Australian Capital Territory distinguished national and international scientists and research leaders providing guidance to the Centre through its advisory committees View the media coverage of the announcement of the National Centre for Groundwater Research and Training. Groundwater Industry Training Course program and registration information 2010 course program and enrol early to secure your place. National Groundwater Conference 2010 A National Groundwater Conference will be held in Canberra from 31 October to 4 November, which will bring together groundwater scientists, water managers and planners from around Australia to discuss sustainable management. For more information and registration please visit:

29. Ministry Of Environment - Water Stewardship Division - Ground Water B.C. ministry site, with general ground water information, water well data, information on groundwater consultants, and links. http://www.env.gov.bc.ca/wsd/plan_protect_sustain/groundwater/index.html

All B.C. Government MoE Main Index Help Contact Us Text Size B.C. Home Ministry of Environment Water Stewardship Division Water Rights and Legislation ... WSD A-Z Index Related Links Environmental Protection Division Environmental Stewardship Division FrontCounter BC Ministry of Health ... WaterBucket Government Quick access to information based on government's structure B.C. Government Ministries and Organizations Other Levels of Government B.C. Home ... Water Stewardship Ground Water document.write("") Water Stewardship Ground Water Legislation Qualified Well Drillers and Qualified Well Pump Installers List of Ground Water Consultants NTS Reports Library and Master List ... Ground Water Reference Library (reports, studies, tools) Ground Water Brochures and Forms Environmental Assessment Ground Water Extraction Projects Ground Water Relevant Links Contact Information for Regional and Victoria Staff Dealing with Ground Water Legislation Short Term Use of Water For Well Drilling Ground Water Protection Regulation (GWPR) Ground Water Protection Regulation recognizes certified water well drillers from Alberta (Part of TILMA Agreement) B.C.'s Ground Water Protection Regulation - What Private Well Owners Should Know

30. Groundwater : Woods Hole Oceanographic Institution Articles, links, and news about groundwater in the coastal ocean, from Woods Hole Oceanographic Institution. http://www.whoi.edu/page.do?pid=11929

31. GeoSystems Analysis, Inc. Services include groundwater contamination studies, regulatory compliance, groundwater resource exploration, recharge studies, groundwater transport modeling, mine waste reclamation, and geotechnical lab testing. Lists past projects and clients. Arizona, USA. http://www.gsanalysis.com/

32. Superfund For Students And Teachers | Superfund | US EPA 5 groundwater. What is groundwater? groundwater is fresh water (from rain or melting ice and snow) that soaks into the soil and is stored in the http://www.epa.gov/superfund/students/clas_act/haz-ed/ff_05.htm

@import 'http://www.epa.gov/epafiles/s/epa.css'; Jump to main content. Superfund for Students and Teachers Recent Additions Contact Us Search: All EPA This Area You are here: EPA Home Superfund Community Involvement Superfund for Students and Teachers ... HAZ-ED - Classroom Activities for Understanding Hazardous Waste Groundwater Groundwater 5: Groundwater What is groundwater? Groundwater is fresh water (from rain or melting ice and snow) that soaks into the soil and is stored in the tiny spaces (pores) between rocks and particles of soil. Groundwater accounts for nearly 95 percent of the nation's fresh water resources. It can stay underground for hundreds of thousands of years, or it can come to the surface and help fill rivers, streams, lakes, ponds, and wetlands. Groundwater can also come to the surface as a spring or be pumped from a well. Both of these are common ways we get groundwater to drink. About 50 percent of our municipal, domestic, and agricultural water supply is groundwater. How does the ground store water?

33. Home - NCGRT Undertakes research in Australia to investigate questions relating to aquifers and aquitards, water flows in complex subterranean systems, and the link between surface water and groundwater. http://www.groundwater.com.au/

SKIP TO CONTENT Home Search National Centre for Groundwater Research and Training Professor Craig Simmons Director National Centre for Groundwater Research and Training The National Centre for Groundwater Research and Training opens with: $55M in cash funding to recruit personnel and build lasting research infrastructure a collaboration between twelve universities and eight industry and government organisations thirty four of the top groundwater researchers in the nation collaborating on its research programs research programs in South Australia, New South Wales, Queensland, Victoria, Western Australia, and the Australian Capital Territory distinguished national and international scientists and research leaders providing guidance to the Centre through its advisory committees View the media coverage of the announcement of the National Centre for Groundwater Research and Training. Groundwater Industry Training Course program and registration information 2010 course program and enrol early to secure your place. National Groundwater Conference 2010 A National Groundwater Conference will be held in Canberra from 31 October to 4 November, which will bring together groundwater scientists, water managers and planners from around Australia to discuss sustainable management. For more information and registration please visit:

34. Groundwater Page, Bureau Of Land And Water Quality, Maine DEP Information about groundwater from the Maine Department of Environmental Protection http://www.maine.gov/dep/blwq/gw.htm

35. Wastewater Software, Water Distribution Software, HEC-RAS/HEC-2 Automated In Aut Offers GMS, FEFLOW, and other groundwater software programs. Also has products for hydraulics and surface water hydrology. http://www.bossintl.com/html/groundwater_modeling_products.html

36. Groundwater: The Sea Beneath Our Feet chapter of an online textbook in environmental science for high school and college students and others. http://oceanworld.tamu.edu/resources/environment-book/groundwater.html

Groundwater The Sea Beneath Our Feet With Contributions From Ethan Grossman and Jennifer McGuire We learned in the chapter on the Water Cycle that almost all fresh water available for human use is ground water. In this chapter we will learn more about the distribution of groundwater, its chemical properties, and its flow through aquifers. Groundwater is water that that fills pores in soil and rock. It is formed when precipitation percolates into the ground. If groundwater is available in useful quantities, the layer of groundwater is called an aquifer . Aquifers are the most important water source for irrigation and and domestic use, especially in the western US. Overall, they supply about half the household water used by people in the the United States. Worldwide, groundwater supplies: 50% of all drinking water, 40% of water used by industry, 20% of water used for irrigation. Fry, 2005 Finney County in southwestern Kansas is now irrigated cropland where once there was shortgrass prairie. Common crops are corn, wheat and sorghum. Green areas in the image are healthy vegetation. Light colored cultivated fields are fallow or recently harvested. The image shows center-pivot irrigation systems that are 800 and 1,600 meters in diameter (0.5 and 1 mile). This area utilizes irrigation water from the Ogallala aquifer, that underlies an area from Wyoming to Texas. The image was acquired on June 24, 2001, is centered near 37.4 degrees north latitude, 100.9 degrees west longitude, and covers an area of 37.2 x 38.8 km.

37. International Ground Water Modeling Center International Ground-Water Modeling Center distributes a large number of practical, public domain and proprietary ground-water programs, ranging from codes based on simple analytical solutions to those incorporating advanced and complex numerical techniques. http://igwmc.mines.edu/

International Ground Water Modeling Center 1516 Illinois St. BH121 Golden CO 80401 TEL (303)273-3103, FAX (303)384-2037 EMAIL: igwmc@mines.ed The International Ground Water Modeling Center (IGWMC) is an internationally oriented information, education and research center for ground-water modeling. IGWMC advises on ground-water modeling problems, distributes ground-water modeling software, organizes short courses and workshops, conducts research in practical, applied areas of ground-water hydrology and modeling, and provides technical assistance on problems related to ground-water modeling. As a focal point for ground-water professionals, the Center supports and advances the appropriate use of quality-assured models in ground-water resources protection and management.

38. Groundwater: Water That Has Penetrated The Earth's Surface groundwater water that has penetrated the earth's surface Animation by Bramer. groundwater is all the water that has penetrated the earth's surface and is found in one of two http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hyd/grnd.rxml

Groundwater water that has penetrated the earth's surface Animation by: Bramer Groundwater is all the water that has penetrated the earth's surface and is found in one of two soil layers. The one nearest the surface is the "zone of aeration", where gaps between soil are filled with both air and water. Below this layer is the "zone of saturation", where the gaps are filled with water. The water table is the boundary between these two layers. As the amount of groundwater water increases or decreases, the water table rises or falls accordingly. When the entire area below the ground is saturated, flooding occurs because all subsequent precipitation is forced to remain on the surface. The amount of water that can be held in the soil is called "porosity". The rate at which water flows through the soil is its "permeability". Different surfaces hold different amounts of water and absorb water at different rates. Surface permeability is extremely important for hydrologists to monitor because as a surface becomes less permeable, an increasing amount of water remains on the surface, creating a greater potential for flooding . Flooding is very common during winter and early spring because the frozen ground has no permeability, causing most rainwater and meltwater to become

39. UC COOPERATIVE EXTENSION GROUNDWATER HYDROLOGY PROGRAM groundwater resources, contaminant transport, and groundwater pollution workshops, shortcourses, weblinks, research reports; Dr. Thomas Harter leads the Univ. of Calif. Coop http://groundwater.ucdavis.edu/

40. Hydro365 Blog that helps bridge the gap between groundwater researchers and practitioners in California, USA. http://hydro365.com

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