摘要:

ABSTRACTUnderground detonations may produce observable effects in surrounding aquifers and wells. The nature and the duration of the effect at any observation point seem to depend on several factors such as the amount of energy released by the detonation, the geologic environment, the position of the buried explosive device in relation to the saturated zone, aquifer characteristics, and the distance from point of detonation. Precise measurement of these effects in wells presented numerous technical problems and resulted in the development of specialized techniques. Initially, these effects were observed by measuring the fluctuation of the free water surface in wells. The current technique employs high‐resolution pressure transducers deep in the water column. Pneumatic packers may be used to restrict the movement of water into the well. Data are recorded on high‐speed oscillogra

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01283.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractA well‐designed and calibrated orifice meter is an accurate and inexpensive measuring device for flow. Endline orifices can be calibrated at work sites by solving an equation that interrelates easily measured dimensions of the orifice and outflo

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01284.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractExpanding water requirements during recent years have intensified development of the productive sedimentary aquifers of the North Carolina Coastal Plain. The effects of this development emphasize the local and regional limitations of the aquifer system and the need for an effective management program.Withdrawal of about 60 million gallons per day from the Castle Hayne limestone, the most productive unit of the principal artesian aquifer of the area, began in July 1965 at a phosphate mine adjacent to the Pamlico River in Beaufort County. Within a few months, the artesian head was lowered below sea level in an area of about 800 square miles, and to more than 100 feet below sea level in the immediate vicinity of pumping. Under these conditions the aquifer became vulnerable to encroachment of saline water from (1) areas of natural occurrence of brackish water in the limestone member of the aquifer; (2) leakage of brackish surface water through the confining beds; and (3) vertical movement of brackish water from the underlying sand member of the aquifer.The dramatic and “overnight” effects of the large withdrawals at the mine site and the threat of damage to the aquifer created sufficient public concern so that legislation was passed by the 1967 General Assembly, giving the Board of Water and Air Resources authority to regulate ground‐water withdrawals as needed to protect the aquifers of the State. An adequate management program can be accomplished that will not only protect the aquifer but will improve the development potential. The development of such a management program requires a thorough knowledge of the hydrology of the aquifer system, the objective of studies in progress. The implementation of the program will require the support of an informed p

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01285.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractThe project developed between the U. S. Army Corps of Engineers, Office of Appalachian studies and the U. S. Geological Survey for a study of the ground‐water resources in Appalachia had two principal objectives. The first objective was to describe in general terms the ground‐water resources of the Region as a whole and the second objective was to describe in greater detail the ground‐water resources at about 20 selected sites. This paper deals with the methods used to describe the Region as a whole, wich a special emphasis on availability and cost of developing ground water, as was requested by the Office of Appalachian St

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01286.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractPumping test data from a single well were used to estimate aquifer volume affecting drawdown. After four days of pumping from a 240 feet thick welded tuff aquifer in southern Nevada, the volume of the wedge‐shaped mass tested was estimated to be about 15.6 billion cubic feet (440 million cubic meters). The field coefficient of permeability of the aquifer is 275 gallons per day per square foo

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01287.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractThe standard water‐level indicator can be easily and inexpensively modified so that it also measures casing lengths. The simple modification permits electrical current from one wire of the two‐wire probe to be routed through the metal casing. The semiquantitative method works well with most metal casings, including nonmagnetic ones, and can be used to detect most casing reductions. The method is limited in that it works only below the water level in the well, and in that it cannot easily detect casing reductions when the conductance between the upper and lower casings is

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01288.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

ABSTRACTThis paper deals successively with some general concepts of scientific communication, with the characteristics of four well‐known hydrology journals and with ways in which messages are obtained. The most important conclusion is a rationale for restrained publicatio

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1969.tb01289.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY