Reference

Nutrients and freshwater delivered by the Mississippi and Atchafalaya Rivers drive algal production in the northern Gulf of Mexico, which eventually results in the widespread occurrence of hypoxic...

The groundwater resources of about 400 square miles of the East Mountain area of Bernlillo, Sandoval, Santa Fe, and Torrance Counties in central New Mexico were evaluated by using groundwater levels...

The U.S. Geological Survey well profiler was used to describe arsenic-related water quality with well depth and identify zones yielding water with high arsenic concentrations in two production wells...

Nickel-cobalt (Ni-Co) laterite deposits are supergene enrichments of Ni Co that form from intense chemical and mechanical weathering of ultramafic parent rocks. These regolith deposits typically form...

Current global and domestic mineral resources of beryllium (Be) for industrial uses are dominated by ores produced from deposits of the volcanogenic Be type. Beryllium deposits of this type can form...

The city of Tulsa, Oklahoma, uses Lake Eucha and Spavinaw Lake in the Eucha-Spavinaw Basin in northwestern Arkansas and northeastern Oklahoma for public water supply (fig. 1). Construction of...

There has been a large amount of study during the last few decades on incised valley-fill deposits (for example, Dalrymple and others, 1994), and on their potential as oil and gas reservoirs (for...

Milltown Reservoir is a National Priorities List Superfund site in the upper Clark Fork basin of western Montana where sediments enriched in trace elements from historical mining and ore processing...

During 2009, the U.S. Geological Survey, in cooperation with Gunnison County, initiated a study to estimate the potential for postwildfire debris flows to occur in the drainage basins occupied by...

One of the greatest challenges for conserving grassland, prairie scrub, and shrub-steppe ecosystems is maintaining prairie dog populations across the landscape. Of the four species of prairie dogs...

The responses of species and ecosystems to future climate changes will present challenges for conservation and natural resource managers attempting to maintain both species populations and essential...

The City of Tulsa, Oklahoma, uses water from Lake Eucha and Spavinaw Lake in the Eucha-Spavinaw basin of northwestern Arkansas and northeastern Oklahoma for public water supply. Increases in algal...

In this study, we examined four randomly selected copper-bearing minerals-azurite, malachite, bornite, and chalcopyrite. Our objectives were to examine and enumerate the crystalline and chemical...

The characterization of total-nitrogen (TN) concentrations is an important component of many surface-waterquality programs. However, three widely used methods for the determination of total...

A substantial expansion in coalbed natural gas production has taken place in the western United States. The production water from coalbed natural gas extraction contains many constituents. For some...

We compared the ability of three leading informationextraction software programs and manual hand digitization to interpret information from remotely sensed imagery of a visually complex gas field in...

A conceptual model of the hydrogeologic framework, geochemistry, and groundwater-flow system of the Edwards- Trinity and related aquifers, which include the Pecos Valley, Igneous, Dockum, Rustler,...

Elevated concentrations of dissolved mineral salts or dissolved solids in water (salinity) can result in numerous and costly issues for agricultural, industrial, and municipal water users and...

Declining water levels caused by withdrawals of water from wells in the west-central part of the Denver Basin bedrock-aquifer system have raised concerns with respect to the ability of the aquifer...

The Colorado River Basin provides habitat for 14 native fish, including 4 endangered species protected under the Federal Endangered Species Act of 1973. These endangered fish species once thrived in...

The U.S. Geological Survey, in cooperation with the Kansas Water Office, investigated sediment transport to and from three small impoundments (average surface area of 0.1 to 0.8 square miles) in...

A statewide study was performed to develop regional regression equations for estimating selected annual exceedance- probability statistics for ungaged stream sites in Iowa. The study area comprises...

The reserve growth of fields has been a topic for ongoing discussion for over half a century and will continue to be studied well into the future. This is due to the expected size of the volumetric...

The U.S. Geological Survey and the Naval Facili-ties Engineering Command Southeast investigated natural and engineered remediation of chlorinated volatile organic compound (VOC) groundwater...

The United States possesses an effective and efficient surface transportation infrastructure that promotes both the well-being of its citizens as well as important economic and national security...

This report draws upon eight State case studies to identify processes, experiences, and results of transit participation in statewide planning with a focus on non-urbanized or rural areas. Transit at...

The purpose of this study is to determine the apparent factors and causes of violations of restricted airspace, particularly temporary flight restrictions (TFRs) and air defense identification zones...

In effort to oppose the use of aircraft by terrorists, the FAA has been establishing temporary flight restrictions (TFRs), air defense identification zones (ADIZs), and other restrictive airspace in...

This report hypothesizes that the United States has reached a critical juncture in terms of national mobility trends and underlying socio-demographic conditions and travel behavior that will result...

This document catalogs the symbols presented with the various interfaces used by Federal Aviation Administration Airway Facilities specialists. It includes a high-level overview of each system and...