Conference Papers
Science Quality and Integrity
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Use of borehole neutron logs to estimate moisture content in the unsaturated zone of an alluvial aquifer
he neutron borehole logging tool was calibrated for the determination of moisture content in theunsaturated zone of an alluvial aquifer. A continuous core sample was collected to a depth of 15 ft from the unsaturated zone.Moisture content and other soil properties were determined by standard soil-laboratory techniques. The neutron logs profile was correlated to moisture content. The first correlat
Authors
Vicente Quinones-Aponte, Ramon A. Carrasquillo
Role of blanket deposits on the hydrology and water chemistry of the limestone water-table aquifer within the north coast of Puerto Rico through interpretation of geochemical data
No abstract available.
Authors
Angel Roman-Mas
Estimating ground-water influx to a portion of the Rio Grande de Manati River basin in Puerto Rico through the measurement of 222Rn
Water has become a critical commodity in the Caribbean Region. In spite of a relative abundance of rainfall even on the smaller islands, the region is faced with severe seasonal shortages as well as increasing water quality problems. The supply of thewater needs in the area will become even more critical as economic development accelerates and the population continues to increase. The development
Authors
K. Kelly Ellins, Angel Roman-Mas, Roger W. Lee
The use of remote sensing data in geographic information systems for hydrologic studies in developing countries
No abstract available.
Authors
D. G. Moore
Implications of recent advances in instrumentation for strong-motion studies
No abstract available.
Authors
Roger D. Borcherdt
Transient electromagnetic soundings in the Michigan Basin for ground water evaluation
No abstract available.
Authors
D.V. Fitterman
Remote sensing and mapping of the vegetation and land use of Senegal
No abstract available.
Authors
G. Gray Tappan
Dynamics of slow landslides: a theory for time-dependent behavior
No abstract available.
Authors
Richard M. Iverson
USGS/Connecticut Geographic Information System project
No abstract available.
Authors
D. A. Nystrom, B. E. Wright, M. P. Prisloe, Lawrence G. Batten
Commercial GIS's for natural resources management: What a manager needs to know
No abstract available.
Authors
Stephen Prisley
**1**5N-NMR INVESTIGATION OF HYDROXYLAMINE DERIVATIZED HUMIC SUBSTANCES.
Humic substances are the most abundant naturally occurring refactory organic compounds in soils and water. They have a broad range of physical, chemical and physiological properties. In soils, humic substances contribute to the cation exchange capacity, help maintain the physical structure, and play a role in plant growth and nutrition. In aquatic systems, humic substances serve to regulate the le
Authors
Kevin A. Thorn, Jeffrey B. Arterburn, Michael A. Mikita