Tidal fluctuations of water level observed in wells in East Tennessee

Richardson, Rachel M.

doi:10.1029/tr037i004p00461

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…The well in Iowa City, Iowa, showed fluctuations of as much as 0.18 foot, nearly double the maximum of the Main Terrace of Steamboat Springs. Stewart (1961) described earth-tidal amplitudes as much as 0.25 foot in wells in crystalline rocks in Georgia, where barometric influence was found to be slight; Richardson ( 1956) published a brief description of tidal fluctuations in wells in Tennessee accompanied by strong effects of precipitation but with little or no barometric response. Melchior ( 1959) found both barometric and earth-tidal effects in wells in Belgium and in the Congo.…”

Section: Influence Of Earth Tidesmentioning

confidence: 99%

Hydrology, activity, and heat flow of the Steamboat Springs thermal system, Washoe County, Nevada

White¹

1968

Professional Paper

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Section: Influence Of Earth Tidesmentioning

confidence: 99%

Hydrology, activity, and heat flow of the Steamboat Springs thermal system, Washoe County, Nevada

White¹

1968

Professional Paper

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“…Unfortunately Stoneley's solution does not lead to realistic values of the Love numbers; therefore, Pekeris' values for the necessary constants are in error. Richardson [1956] reported on the tidal fluctuations in a well at Oak Ridge, Tennessee. He pointed out that the magnitude of lunar semidiurnal tidal dilatation is approximately 1.5 )4 10 -•.…”

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confidence: 99%

Response of well-aquifer systems to Earth tides

Bredehoeft¹

1967

J. Geophys. Res.

377

317

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The water level in a well open to an artesian aquifer responds to pressure‐head fluctuations caused by the dilatation of the aquifer. Based on hydrologic considerations, it is shown that (1) most well‐aquifer systems respond to disturbances with periods of less than several days as if the well were drilled into a medium of infinite or partially bounded extent, and (2) the representation of an aquifer as a finite cavity is unrealistic for most well‐aquifer systems. The amplitude of tidal water level fluctuations in well‐aquifer systems depends on the dilatation and the specific storage of the aquifer. Analysis of the dilatation caused by the earth tide is based on the assumptions that (1) the latitudinal and longitudinal strains caused by the earth tide are determined by the elastic properties of the earth as a whole and are largely independent of the elastic properties of a near surface aquifer, and (2) the vertical strain of a near surface aquifer depends on Poisson's ratio (or the Lamé constants) for the aquifer and the latitudinal and longitudinal strains. The tidal dilatation can be computed from equilibrium tide theory provided that Poisson's ratio is known. The amplitude of the tidal dilatation produced by the large semidiurnal wave, M2, is approximately 1 × 10−8. It is not unusual to have earth‐tide fluctuations in wells corresponding to M2 with an amplitude of 1 to 2 cm. The fact that tidal water‐level fluctuations depend upon the specific storage of the aquifer explains the variation in amplitude which troubled others. The specific storage and the porosity of the aquifer can be computed from an analyses of earth‐tide fluctuations if Poisson's ratio for the aquifer is known. Computations of specific storage and porosity are presented for three artesian wells for which tidal harmonic analysis of hydrograph data was published by Melchior. The results of these calculations appear to be better than one might reasonably expect.

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“…With these observations in mind, it should be noted that wells in unconfined aquitards that have very small porosity values (or very large aquifer saturated thickness) may also display small water level fluctuations in response to earth tides (Bredehoeft 1967). In fact, Richardson (1956) reported tidal fluctuations in a well at Oak Ridge that penetrated an • unconfined aquifer and had a semidiurnal tidal fluctuation with an amplitude of -2 cm (0.06 ft). The tidal response is generally less efficient than in a well that taps confined systems; thus, the larger values observed in most of the packed wells are considered to • represent a confined system.…”

Section: -•mentioning

confidence: 98%

The deep hydrogeologic flow system underlying the Oak Ridge Reservation

Nativ¹,

Hunley²

1993

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The authors are very grateful to the many people who made this work possible. The many efforts of Kip Solomon and RaNaye Dreier facilitated the work of this project. Kip • Solomon and Norman Farrow designed the packer/pressure transducer assembly that allowed us to monitor pressure variations in the deep wells with high resolution. Scott Gregory assisted with setting the pressure transducers and with data logging and de,',nloading. Bob Kennard and Kim Davis helped in the logging of the deep wells. Andy Hunt assisted with setting the packers. Kip Solomon and Andy Hunt designed the purging system of the deep wells. Tom Zondlo and Scott Gregory prepared Figs. 1 and 7, respectively. RaNaye Dreier,

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Tidal fluctuations of water level observed in wells in East Tennessee

Cited by 7 publications

References 3 publications

Hydrology, activity, and heat flow of the Steamboat Springs thermal system, Washoe County, Nevada

Hydrology, activity, and heat flow of the Steamboat Springs thermal system, Washoe County, Nevada

Response of well-aquifer systems to Earth tides

The deep hydrogeologic flow system underlying the Oak Ridge Reservation

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