Abstract: This report presents procedures for estimating low-flow frequency characteristics for streams in the Susquehanna River basin. The techniques can be used at ungaged sites as well as sites where insufficient data are available to make a reliable estimate. Streams have been divided into two types major and minor. Major streams are the Susquehanna, West Branch Susquehanna, Juniata, and Chemung Rivers. Points on these streams with drainage areas of more than 2,000 square miles (5,180 kilometers) are included in this category. Points on these streams with drainage areas of less than 2,000 square miles fall into the minor stream category. Generally minor streams are herein defined as those draining less than 2,000 square miles (5,180 kilometers). Multiple-regression techniques have been used to develop relations for estimating the 1-, 3-, 7-, 30-, and 183-day duration low flows at recurrence intervals of 10, 20, 50 and 100 years for annual series data and the 1-, 3-, 7-, and 30-day duration low flows, at the same recurrence intervals, for six individual months, May through October, inclusive.

From introduction: This documentation is designed to provide the user with the basic philosophy and structure of PRMS, instructions for application of established models designed as cataloged procedures, and instructions for interaction with the PRMS library to permit user additions or modifications of model components. The components and subroutines described in this document are those available at the time of publication. However, the library is dynamic and will be enhanced and updated through time. This manual will be updated to reflect major additions and changes through manual inserts or republications.

A report that provides details about fire assaying techniques to separate and concentrate the noble metals from many varieties of samples.

From Foreword: "This manual was written to serve as a guide for analysts interested in the determination of small amounts of uranium. All of the methods presented here have been developed in the U.S. Geological Survey and are based on the measurement of the fluorescence of uranium in fluoride melts."

Report discussing the probable impact of urban development on the magnitude and frequency of flooding in the lower reaches of the Walnut Creek basin. (from Abstract)

From introduction: The purpose of the study is to determine the effects of a new reservoir, Raystown Lake, on downstream low-flow frequency characteristics.

From introduction: The primary objective of this study, second in the series, is the development, calibration, and verification of flow-routing models for the Susquehanna River from Waverly, New York, to Sunbury, Pennsylvania. These models will permit SRBC to estimate the effects of water-resource developments upstream from Waverly at six locations on the Susquehanna River. They were also used to simulate for existing conditions at two ungaged sites.

From abstract: An ARIMA (1, 0, 1) model is used to generate annual flow sequence at three sites in the Juniata River basin, Pennsylvania. The study was designed to analyze low-flow frequency characteristics of a basin. The model preserves the mean, variance, and cross-correlations of the observed station data.

Abstract: Estimates of the travel time of waterborne particles in streams is important for pollution studies and in the event of spills of contaminants. This report provides data for the 16 Indiana streams on which time-of-travel information has been obtained and a means for estimating the velocity of any naturally flowing stream in Indiana with a drainage area of 80 square miles (210 square kilometers) or more. Measured velocity rates compiled from the time-of-travel data collected in Indiana are related to 25, 50, 100, and 200 percent of the average discharge of streams shown in this report. Velocities at these discharges are significantly related to their respective watershed characteristics (average discharge and slope).Generalized relations of the velocities as functions of the streams' watershed characteristics are developed as multivariate regression equations using the data from each of the measured streams.

From abstract: In 1948, 7,662 miles of roadside rocks and soils in Vermont, New Hampshire, Connecticut, Rhode Island, and southeastern New York were traversed with a car-mounted Geiger-Mueller counter. The observed distribution of the abnormally radioactive rocks and soils is limited to certain areas, herein called "radioactive provinces," that are separated from each other by areas of essentially nonradioactive rock.

A bibliography of information about various clays, kaolins, and the ceramic arts.

Abstract: The stream-gaging program in Pennsylvania is subject to budgetary constraints in the next several years. Elimination of those gaging stations that have no current-purpose use and little utility in providing regional flow-characteristic information is the most effective way to reduce costs. The efficient design of a network of gaging stations for obtaining regional information requires knowledge of the information in the data base and an assessment of the potential for improving the accuracy of data-transfer mechanisms. The analytical technique known as Network Analysis for Regional Information is used to assess acquired streamflow information and to evaluate its transferability within previously determined regions of homogenous streamflow characteristics. Regression equations that relate low-, mean-, and flood-flow characteristics to basin parameters are the data-transfer mechanisms used in the evaluation. This analysis showed that only minor improvements in the regression equations can be expected after 20 additional years of data collection at gages in the 1980 program. Transfer mechanisms with less model error are needed for improved data transferability. A more efficient program can be achieved by discontinuing selected gages in the planning-and-design network. To this end, 11 continuous-record and 25 partial-record gages were selected to be discontinued by April 1, 1980. Additionally, …

A report about the fauna of the Saint John Formation contained in the Hartt Collection.

From introduction: "This report is a statement of progress during the six-months period from June 1 to November 30, 1956, on investigations of radioactive materials in the United States and Alaska, undertaken by the U.S. Geological Survey under the sponsorship of the Division of Raw Materials and the Division of Research of the Atomic Energy Commission."

A report about rockfalls and debris avalanches on the southern approach to Smuggles Notch in Vermont.

Report discussing the uranium content evaluation of coals and shales collected in eastern Ohio. Information regarding the scope of the investigation, stratigraphy of the areas of collection, results of the radioactivity evaluation, and conclusions are included.

Report discussing a method for the volumetric estimation of the oil yield of oil-bearing shale. The method can be applied to both shale and phosphatic shale.

Report discussing a study regarding methods for extracting rare earths and thorium from phosphate rock samples.

Abstract: Use of previously coded and tested subroutines simplifies and speeds up program development and testing. This report presents routines that can be used to calculate various probability distributions and other functions of importance in statistical hydrology.

Report describing a wagon drill used for collecting samples of underground rock formations, as well as its performance, maintenance, and operating costs.

Report discussing a geological experiment in which drill holes in carnotite deposits were logged with the objective of developing a technique for the stratigraphic correlation of ore-bearing beds.

This bibliography is a record of North American paleontology for the years 1888 to 1892. It is a condensed review of the paleontologic literature appearing during the period.

Report discussing an improved sample holder for measuring the radioactivity of powdered samples. The sample holder "consists of a thin-walled Geiger-Mueller tube, a ground-glass joint, and a four-pin connector."

From abstract: "A study was made of the important factors in the 'direct' fluorimetric determination of uranium in the range 0.0005 to 0.08 micrograms of uranium, and a modified procedure based on these results is given."