Zobrazeno 1 - 9
of 9
pro vyhledávání: '"John B. Ong"'
Publikováno v:
Water Resources Research. 50:8281-8299
Models of dual-domain mass transfer (DDMT) are used to explain anomalous aquifer transport behavior such as the slow release of contamination and solute tracer tailing. Traditional tracer experiments to characterize DDMT are performed at the flow pat
Autor:
Charles F. Harvey, Mason Stahl, M. H. Tarek, A. van Geen, J.A. Anderson, Carole D. Johnson, A.B.M. Badruzzaman, John B. Ong, John W. Lane
Publikováno v:
Groundwater. 52:195-200
We apply fluid-replacement logging in arsenic-contaminated regions of Bangladesh using a low-cost, down-well fluid conductivity logging tool to detect leaks in the cased section of wells. The fluid-conductivity tool is designed for the developing wor
Publikováno v:
Water Resources Research. 49:5615-5630
[1] Anomalous solute transport, modeled as rate-limited mass transfer, has an observable geoelectrical signature that can be exploited to infer the controlling parameters. Previous experiments indicate the combination of time-lapse geoelectrical and
Publikováno v:
Hydrogeology Journal. 20:1483-1495
Lake–groundwater interactions exhibit a complex three-dimensional (3D) structure that is seldom studied. The utility of waterborne electrical resistivity (ER) surveys is explored for characterization of 3D groundwater flow and solute transport patt
Publikováno v:
Advances in Mathematics of Communications. 5:1-10
Elliptic curves over finite fields have applications in public key cryptography. A Koblitz curve is an elliptic curve $E$ over $\mathbb F$2; the group $E(\mathbb F$2n$)$ has convenient features for efficient implementation of elliptic curve cryptogra
Publikováno v:
Hydrogeology Journal. 18:1539-1545
A frequency-domain electromagnetic (FDEM) survey can be used to select locations for the more quantitative and labor-intensive electrical resistivity surveys. The FDEM survey rapidly characterized the groundwater-flow directions and configured the sa
Publikováno v:
Journal of Hydrology. 371:22-30
Summary We investigate the conditions and criteria for identifying flow regimes in shallow groundwater-dominated lakes in arid environments. Relying on regional and local water-table configurations, we develop a steady-state model of lake-aquifer sys
Publikováno v:
Journal of Geophysical Research: Earth Surface. 117
[1] Emissions of salt dust from the shores of saline lakes significantly impact lake chemistry, air quality, transportation, human health, and climate. Quantitative methods for assessing these emissions, however, are still in the developmental stage.
Autor:
John B. Ong, Vitaly A. Zlotnik
Publikováno v:
Ground water. 49(2)
Potentiomanometers (PMs) are commonly used to determine flux directions across interfaces between surface waters and aquifers. We describe a complementary function: estimating small-scale hydraulic conductivity (K) in a lakebed, using the constant-he