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

The Home page of the USGS for geological matters.
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Find Out More »  |  Open Resource  |  2009/08/13  |  230 Report Broken   Tell A Friend

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

The West Gulf RFC was founded in September 1961 at Fort Worth, Texas, to assume hydrologic forecast responsibility for the Rio Grande basin and the Texas rivers which drain into the Gulf of Mexico.
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Find Out More »  |  Open Resource  |  2009/08/13  |  250 Report Broken   Tell A Friend

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

Most USGS work in Texas involves the appraisal of the State's water resources in cooperation with more than 80 local, State, and Federal agencies.
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Find Out More »  |  Open Resource  |  2009/08/13  |  193 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  |  150 Report Broken   Tell A Friend

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

The Walter Geology Library of the University of Texas at Austin
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Find Out More »  |  Open Resource  |  2009/08/13  |  238 Report Broken   Tell A Friend

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

Web Resources in Geology - Noranda Earth Sciences Library, Topics of Interest, By Study Area, University Depts., References...
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Find Out More »  |  Open Resource  |  2009/08/13  |  241 Report Broken   Tell A Friend

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

Various federal and state guidance documents and rules are rapidly evolving on the subject of vapor intrusion. Discover what experts are saying about the topic when under the scrutiny of discovery and litigation, and how are courts reacting.

Given the existence of non-binding U.S. EPA guidance, complimented by diverse vapor intrusion regulations and policy in the states, how do property owners, regulated parties, plaintiffs, defendants, attorneys, environmental consultants, and others go about evaluating and making decisions regarding vapor intrusion?

The answer is the sa... More →
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Find Out More »  |  Open Resource  |  2016/02/23  |  148 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

WelNet monitors changes in groundwater systems that are caused by pumping, agricultural methods, and local precipitation. The impact of pumping and agriculture is accelerating and pressure on the groundwater resource is intensifying. Hydrogeologists need data to confirm these changes, and make recommendations to adapt to them. While some exciting new information sources, like NASA GRACE satellite program, have become available, data resolution, and therefore local response, remains low.

In groundwater models, the software estimates that groundwater decision-makers rely on, but they ... More →
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Find Out More »  |  Open Resource  |  2016/01/03  |  148 Report Broken   Tell A Friend

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

Michael R. Shultz blogs that outcropping ancient river deposits illustrates the primary challenge to successful groundwater remediation ... stratigraphic heterogeneity. Encountering heterogeneity in the form of stratigraphic layering is common at every groundwater remediation site where sedimentary aquifers are impacted.

Unfortunately, so too is the common practice of layer labeling and counting in which it is assumed that the first sand encountered when drilling (i.e., the A sand), is a homogeneous, isotropic layer, followed by the next layer, etc. This almost never the case, a... More →
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Find Out More »  |  Open Resource  |  2016/02/09  |  154 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

Seyed Mahmood VaeziNejad, et al., report that drought and groundwater withdrawal in recent years has caused numerous problems such as subsidence due to falling of subsurface water table, the reduction of water quality, etc. in cities across the world. This research is a case study that deals with harmful effects of subsurface water withdrawal in the city of Kerman and with the practical monitoring of the subsidence that makes the prediction of land subsidence possible.

The artificial neural network has been used for modeling the monitored results and prediction of future subsidence... More →
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Find Out More »  |  Open Resource  |  2016/01/17  |  89 Report Broken   Tell A Friend
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