Results 71 to 80 of about 817 (127)

Experimental Insights into Storage Capacity Enhancement and Seepage Mechanisms during Multicycle Injection-Production in Oil-Reservoir-Converted Underground Gas Storage. [PDF]

ACS Omega
Zhang Q, Zheng D, Wang J, Shi L, Li C, Yu H.   +5 more
europepmc   +1 more source

A new hybrid neural network framework inspired by biological systems for advanced financial forecasting. [PDF]

Sci Rep
Rao C, Xue T, Kan M, Zhou P, Lan Y.
europepmc   +1 more source

Transient ground bulge derived from a dense broadband seismic array during an aquifer step-drawdown pumping test

Journal of Hydrology
Wu-Cheng Chi, Chu-Fang Yang, Sebastian Wege, Chin-Jen Lin, Chien-Chung Ke   +4 more
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The US EPA's National Nutrient Inventory: Critical Shifts in US Nutrient Pollution Sources from 1987 to 2017. [PDF]

Environ Sci Technol
Brehob MM, Pennino MJ, Compton JE, Zhang Q, Weber MH, Hill RA, Markley S, Pickard B, Keefer M, Stackpoole SM, Knose LA, Ruiz-Mercado GJ, Clark CM, Rea AW, Carleton JN, Lin J, Bash JO, Foley KM, Hogrefe C, Sabo RD.   +19 more
europepmc   +1 more source

Mid Pleistocene Transition caused by decline in atmospheric CO2

Nuber S, Chalk T, Ji X, Scherrenberg M, Heaton T, Zhang X, Stap L, Trudgill M, Block H, Jian Z, Xu C, Kubota K, Andersen M, Barker S, Yu J, Foster G, Rae J.   +16 more
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Step‐Drawdown Test Analysis by Computer

Groundwater, 1975
ABSTRACT Many geohydrologists believe that the step‐drawdown test is useful in determining many important characteristics of a well, whereas others altogether question its utility. In addition to this controversy, its application is hindered because the graphical analysis of data is unwieldy.
John W. Labadie, Otto J. Helweg
openaire   +1 more source

Interpretation of Step-Drawdown Tests with the Differential Evolution Approach

Journal of Hydrologic Engineering, 2022
A step-drawdown test is a common hydrogeological investigation tool employed for identifying the hydraulic characteristics of an aquifer as well as assessing the efficiency of the pumping conditions. Several graphical and optimization-based solution techniques have been devised for analyzing data sets obtained from step-drawdown tests to retrieve ...
Çiftçi, Emin, Şahin, A. Ufuk
openaire   +2 more sources

Analysing step-drawdown tests in heterogeneous aquifers

Quarterly Journal of Engineering Geology and Hydrogeology, 2002
All existing methods for analysing step-drawdown test data assume that the aquifer is homogeneous, whereas most real aquifers are heterogeneous. Failure to account for such heterogeneity can lead to erroneous mis-interpretation of step-drawdown test results, which may in turn result in expensive over- or under-design of long-term pumping plant.
Karami GH, Younger PL
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Meaningful Interpretation of Step‐Drawdown Tests

Groundwater, 1995
Abstract From a critical review of literature it is concluded that the available methods of analyzing step‐drawdown tests produce information which can be misleading, inaccurate, or meaningless. Calculation of the total well loss from step‐drawdown tests, on the other hand, provides a meaningful evaluation of well performance but is ...
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Parameter Estimation for Step‐Drawdown Tests

Groundwater, 1992
Abstract Step‐drawdown tests may be used to evaluate the well loss component of the well drawdown and to obtain estimates of the aquifer properties. A procedure that analyzes step‐drawdown tests with pumping stages of unequal time durations was formulated and developed into a computer program; the method is applicable to confined ...
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