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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures
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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Petrossian, et al., in their report, remind us that groundwater is a natural resource shared among Texas and eight bordering national and international states, New Mexico, Oklahoma, Arkansas, and Louisiana in the United States, and Tamaulipas, Nuevo, Coahuila de Zaragoza, and Chihuahua in Mexico.

Of the 30 major and minor aquifers recognized by the State of Texas, 23 aquifers are shared with one or more of these states. In 2009, the U.S. Environmental Protection Agency Region 6 evaluated groundwater resources in Arkansas, Louisiana, New Mexico, Oklahoma, and Texas and compared the ... More →
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Find Out More »  |  Open Resource  |  2017/07/21  |  6 Report Broken   Tell A Friend

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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Shuhab D Khan, et al., report that sedimentation and deformation toward the Gulf of Mexico Basin cause faulting in the coastal regions. In particular, many active (but non-seismic) faults underlie the Houston metropolitan area. Using geophysical data, we have examined the Hockley Fault System in northwest Harris County.

Airborne LiDAR is an effective tool to identify fault scarps and we have used it to identify several new faults and assemble an updated map for the faults in Houston and surrounding areas. Two different LiDAR data sets (from 2001 to 2008) provide time-lapse images a... More →
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Find Out More »  |  Open Resource  |  2017/07/17  |  8 Report Broken   Tell A Friend

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Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Peter Chawaga reports that in the U.S., arsenic concentrations in excess of the drinking water maximum contaminant level (MCL) of 15 mg/l in groundwater from public wells are distributed across the U.S., but 75% of these wells are in the western U.S., said Babur Mirza, a member of the research team. In basin-fill aquifers in California, Nevada, New Mexico, Arizona, and Utah, 10% of domestic wells sampled had arsenic in excess of the MCL. The Cache Valley Basin is located 128 kilometers northeast of Salt Lake City.

A survey of domestic wells in this basin showed that 17% of the 161 w... More →
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Find Out More »  |  Open Resource  |  2017/06/27  |  13 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Colin McDonald reports that the groundwater of the Edwards Aquifer is hypersensitive to whatever goes on above it (and around and below it). But it is also reflects subsurface Earth movements on the other side of the world. Less than 15 minutes after the earthquake in Japan, the water level at the J-17 well started to vibrate like a seismograph as the series of pressure waves radiated out from the earthquake site in Japan.

They have seen numerous earthquakes in J-17 including earthquakes in Chile, Sumatra, Haiti, Mexico, and Alaska, said Geary Schindel, chief technical officer at th... More →
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Find Out More »  |  Open Resource  |  2017/04/11  |  54 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Bennett and Williams, Inc. provides a balanced approach to environmental stewardship and positive economic outcomes. Clean water is a necessity for life and they are experienced in providing the geoscience and engineering to deliver it. They are a small, responsive, and innovative environmental engineering business. They employ a well-educated, experienced staff with applied expertise in environmental science, geology, hydrogeology, engineering and community development.

Horizontal radial collector wells supply government and industry in the United States with more than a billion g... More →
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Find Out More »  |  Open Resource  |  2017/04/10  |  47 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

LogitEasy created the USCS Calculator for professional geologists who need to classify soil according to the ASTM Visual-Manual Procedure (ASTM-D2488) and record only the percentage of gravel, sand, and fines in the field, without the soil group name and symbol.

The USCS Calculator allows the geologist to determine the soil group name and symbol from your field data, for use in soil descriptions when preparing boring and test pit logs. Geology students and young professional geologists are welcome to use the USCS Calculator for learning the first part of this soil classification pr... More →
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Find Out More »  |  Open Resource  |  2017/03/20  |  60 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Water is commonly thought of as just H2O, but groundwater contains a wide range of dissolved chemical elements from the surrounding environment. Most of these occur naturally, and many are present only in small quantities. These elements can tell us a lot about the source of the water, its quality and possible uses.

In most groundwater, typically only seven ions make up nearly 95% of all ions present. These are calcium, magnesium, sodium, potassium, chloride, sulphate, and bicarbonate. In addition, other chemical elements known as minor and trace elements usually exist in small quan... More →
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Find Out More »  |  Open Resource  |  2017/03/12  |  56 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Tony Phillips reports that as the sunspot cycle declines, cosmic rays increase. Spaceweather.com and the students of Earth to Sky Calculus have been monitoring radiation levels in the stratosphere with frequent high-altitude balloon flights over California. Here are the latest results, current as of Nov. 11, 2016.

Data show that cosmic ray levels are intensifying with an 11% increase since March 2015.

Cosmic rays are high-energy photons and subatomic particles accelerated in our direction by distant supernovas and other violent events in the Milky Way. Usually, cosmic ray... More →
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Find Out More »  |  Open Resource  |  2017/01/07  |  102 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Athanasiadis, et al., report that wetting of bentonite is a complex hydro-mechanical process that involves swelling and, if confined, significant structural changes in its void structure. A coupled structural transport network model is proposed to investigate the effect of wetting of bentonite on retention conductivity and swelling pressure response.

The transport network of spheres and pipes, representing voids and throats, respectively, relies on Laplace-Young equation to model the wetting process. The structural network uses a simple elasto-plastic approach without hardening to ... More →
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Find Out More »  |  Open Resource  |  2016/12/27  |  57 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The International Association of Hydrogeologists (IAH) is an international scientific and educational organization that aims to promote research and understanding of the proper management and protection of groundwater for the common good throughout the world. IAH provides a valuable forum for scientists and engineers working in the fields of hydrogeology and groundwater resource planning, management, and protection who have a broad interest in and an international perspective on groundwater resources and hydrogeological issues. IAH is incorporated as a charitable organization in the United Kin... More →
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Find Out More »  |  Open Resource  |  2016/11/10  |  106 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The Midwest Geosciences Group presents another webinar titled - Taking the Mystery Out of the Subsurface.

The most important factor for:

1. Meaningful well screen design and placement
2. Reliable potentiometric-surface maps
3. Groundwater-monitoring system design
4. Optimum remediation-system design
5. Excavation and foundation design
6. Field management of unanticipated subsurface conditions

The most costly struggle for management in maintaining up-to-date training in basic field procedures and subsurface analysis skills. This compreh... More →
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Find Out More »  |  Open Resource  |  2016/10/10  |  165 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

More than 44 million Americans depend on a private well for their water. Drought conditions and overuse have caused ground water levels to drop all over the country. If a homeowner has a well that is not deep enough, they may have to drill a deeper one or find water elsewhere, an expensive and troubling proposition.

The Journal Nature recently reported that globally, groundwater sources are stressed at 3.5 times their capacity to produce, and the New York Times reported that wells are running dry around the U.S. Midwest. Meanwhile, most people with wells have no idea if the water in... More →
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Find Out More »  |  Open Resource  |  2016/09/04  |  95 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Ronald B. Peterson reports that the first step as discussed in a Water Well Journal column earlier this year (WWJ, May 2016) is proper planning. Included in the planning phase is obtaining an appropriate drilling fluid program, as property owners, hydrogeologists, or engineers often require a drilling-fluid program.

Your chosen drilling fluid vendor can either provide a drilling fluid program for you or facilitate getting one prepared for you. Make sure you provide them with as much data as you can so the program is appropriate for your project.

We need to locate and veri... More →
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Find Out More »  |  Open Resource  |  2016/08/22  |  131 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Luczaj, et al., report that disseminated Mississippi Valley-type (MVT) mineralization occurs throughout NE Wisconsin, and is recognized as the source of regionally extensive natural groundwater contamination in the form of dissolved arsenic, nickel, and other related metals. Although considerable attention has been given to arsenic contamination of groundwater in the region, limited attention has been focused on characterizing the bedrock sources of these and other metals.

A better understanding is needed, especially in areas where groundwater is the dominant source of drinking wat... More →
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Find Out More »  |  Open Resource  |  2016/06/21  |  191 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Yamaha has announced the inaugural commercial operation of its RMAX remotely piloted helicopter for agriculture spraying service in the U.S. The RMAX flight was completed in California for Napa-based Silverado Farming Company, a vineyard management company. During its debut the RMAX applied a fungicide for preventative control of powdery mildew, one of the most common fungal diseases affecting grapes and many other crops.

For Yamaha, the U.S. debut of RMAX commercial services for the agricultural industry marks the culmination of several years working with the FAA to receive appropr... More →
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Find Out More »  |  Open Resource  |  2016/06/02  |  164 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The Harris County Flood Control District Flood Warning System measures rainfall amounts and monitors water levels in bayous and major streams on a real-time basis to inform citizens of dangerous weather conditions. The system relies on 133 gauge stations strategically placed throughout Harris County bayous and their tributaries. The stations contain sensors that transmit valuable data during times of heavy rainfall and during tropical storms and hurricanes. Some gauges also measure wind speed and direction, barometric pressure, air temperature, road temperature and humidity.

The pur... More →
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Find Out More »  |  Open Resource  |  2016/05/26  |  183 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Meeting the need for safe water supplies for U.S. communities in the 21st century will depend in large part upon groundwater. For instance, the U.S. public supply on a daily average pumps 15.7 billion gallons of groundwater, 20.7% of the national daily total of 76 billion gallons. The National Ground Water Association professional members are teaming to reach the 87.1 million Americans in 39,000 communities using an estimated 75,000 community wells to educate how five steps of well design, well development, water use calculation, pump selection, and operation and maintenance will enhance water... More →
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Find Out More »  |  Open Resource  |  2016/05/23  |  118 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Brambati, et al.(2003) deal with the geological setting, history and subsidence of the Venetian Plain. Major attention is paid to the Pleistocene-Holocene stratigraphic sequence in the Lagoon of Venice, in relation to its origin that dates back to 6 to 7 kyr BP.

Geological land subsidence has played an important role in the origin and the evolution of the lagoon, and anthropogenic subsidence, which has recently assumed a major importance for the Venetian environment. Considering also the sea level rise, 23 cm loss in land elevation has occurred in the last century, is leading to i... More →
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Find Out More »  |  Open Resource  |  2016/05/21  |  145 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Stacy Liberatore reports that geoscientists at NASA Jet Propulsion Laboratory, UCLA and the Center for GeoInformatics at Louisiana State University, Baton Rouge, collaborated on the study, which covered the period from June 2009 to July 2012.

Other notable sinking was found in New Orleans Upper and Lower Ninth Ward in Metairie, where the measured ground movement could be related to water levels in the Mississippi. And an annual 1.6 inch drop was observed at Bonnet Carre Spillway east of Norco, which is the last line of protection against springtime river floods blowing over the leve... More →
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Find Out More »  |  Open Resource  |  2016/05/20  |  120 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Sarah Rafique reports that HPWD measures 1,400 wells annually in a 16-county service area to monitor groundwater levels. And, for the first time in more than 10 years, overall water levels are up in the Ogallala and Edwards-Trinity aquifers, according to data released in April by HPWD. The increase reflects the previous year pumpage.

Before this year annual water level increase, the last time groundwater levels were up was in 2004, when there was an increase of 0.74 inches, reflecting pumpage in 2013, McCain said. This data shows Floyd County had the highest gain with a 16.64-foot i... More →
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Find Out More »  |  Open Resource  |  2016/05/20  |  195 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Jared Firestone opines that executing a Daubert challenge against an opposing party can be the deciding factor in whether you win or lose a case. Due to the enormous consequences a Daubert challenge can have, it is important for any practicing trial attorney to understand how to execute a Daubert challenge, when to do so, and strategies relating to the execution of such a challenge. Below, we have broken down the process of launching a successful Daubert challenge against opposing counsel expert to help you identify the right situation to deploy a gatekeeping challenge, as well as a step-by-st... More →
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Find Out More »  |  Open Resource  |  2016/05/14  |  131 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

World Economic Forum Global Risks Report 2016, indicates that water crises are one of the three biggest challenges we face. A new study has backed up these findings, estimating that 4 billion people or two-thirds of the global population are facing water scarcity.

This figure is bigger than previously thought(?). In the past, studies looked at water scarcity on an annual basis. They concluded that between 1.7 billion and 3.1 billion people were affected. This latest study instead examined water scarcity on a monthly level, which gives a more accurate reflection of just how severe th... More →
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Find Out More »  |  Open Resource  |  2016/05/14  |  176 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Celine Lim reports that Canadian hydrogeologist Dr. John Cherry credits his stellar career in groundwater research, protection and management to a series of fortuitous incidents in his early years as a professional. The Lee Kuan Yew Water Prize laureate shares his journey with Eco-Business.

It was 1967, Prof. John Cherry had just joined the University of Manitoba in Winnipeg, Canada, as the first groundwater professor in Canada when he was accosted by a young woman, the only female in the entire engineering department. The American student, Barbara Lund, explained that, after spend... More →
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Find Out More »  |  Open Resource  |  2016/05/04  |  153 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

The press release of April 12, 2016 indicates that in March 2016, 174 Flint residents (out of 269 who participated in the original August 2015 sampling of Flint water) re-sampled their homes for lead in drinking water. The goal was to track possible improvements since the switch back to Detroit water in October 2015 and implementation of improved corrosion control (i.e., extra phosphate added beyond that present in Detroit water) starting December 2015. This work was coordinated by Virginia Tech and was funded by the U.S. EPA (EPA).

The following conclusions are based on a prelimin... More →
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Find Out More »  |  Open Resource  |  2016/04/19  |  141 Report Broken   Tell A Friend

Index / Hydrogeology/Geology/Environmental/ / Field Methods and Procedures

Nearly 7,200 hectares of land in Ho Chi Minh City in Vietnam is sinking rapidly, with experts blaming it on the depletion of groundwater and massive construction. A report from the City Department of Natural Resources and Environment Thursday said around 20 areas in the city are sinking fast by an average of 15 millimeters in 2015, with one area going down by as much as 28 mm.

Forty other areas sank by 5-10 mm last year. The affected areas are Districts 7, 8, 12, Binh Tan, Binh Chanh, Hoc Mon and Nha Be, with the southern and southwestern areas the worst hit. Districts 8, 12 and Bin... More →
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Find Out More »  |  Open Resource  |  2016/02/29  |  151 Report Broken   Tell A Friend
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