A Practical Approach to Watershed Sanitary Surveys
A step-by-step approach for conducting watershed sanitary surveys can be successfully applied to watersheds of all sizes. The approach involves preparing a watershed map, contacting regulatory...

Scour Processes Observed in Field Data
River channels scour and aggrade due to complex, interrelated natural processes that are dynamic over space and time. Channel scour is particularly difficult to predict for bridge crossings,...

Laboratory Evaluation of a Conductivity Probe for Scour Monitoring
Laboratory tests were used to evaluate the ability of conductivity sensors to measure streambed elevation. Tests were completed on a 2.1-m probe with a resolution of about 8 cm that was...

Evaluation of Selected Instruments for Monitoring Scour at Bridges in New York
Reliable methods to monitor scour at bridges are needed to ensure public safety and minimize the cost to repair or replace vulnerable bridges. The U.S. Geological Survey, in cooperation...

Visual Mosaicking of the Ocean Floor and its Relation to Three-Dimensional Occlusions

Monitor Well Design, Installation, and Documentation at Hazardous and/or Toxic Waste Sites
This manual provides the minimum elements for consideration in the design, installation, and documentation of monitor well placement at projects known or suspected to contain chemically...

Site-Specific Live Load Models for Bridge Evaluation

Optimum Smoothing Filter for Geophysical Tomography by the Extended Bayesian Method

Magnetic Investigation of a Simulated Hazardous Waste Site

Integrating the Refraction Seismic Method into Stream Crossing Characterization for Scour and Excavation Conditions

Ground and Airborne Magnetic and Electromagnetic Surveys at a Hazardous Waste Site

Use of Geophysics to Aid in Mapping Basalts Relevant to Ground Water Flow and a Landslide Hazard at Hagerman Fossil Beds National Monument

The Application of Time Domain Electromagnetics to a Regional Groundwater Investigation in Western Washington

Pavement Evaluation with Seismic Tomographic Imaging

Geophysical Characterization of Florida Limestone—An Investigative Case History

Geophysical Investigation of Karst Collapse Features for a Proposed Waste Rock Stockpile Irian Jaya, Indonesia

A Surveying Trip Report from George Washington's Diary

Early Surveys in the Nation's Capital

Geophysical Methods for Environmental Assessment

Applying Advanced Technology in Vessel Positioning for Dredging





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