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Step-drawdown tests in exploitation wells for thermal and mineral water – Case study from Slovenia
Geologija, 2020 A comparative analysis of step-drawdown tests was performed in order to estimate the well performance in Slovenian thermal and mineral water wells.
Luka SERIANZ +2 more
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Step‐drawdown tests and the Forchheimer equation [PDF]
Water Resources Research, 2010 Step‐drawdown tests (SDTs) typically involve pumping a well at a constant rate until a quasi‐steady state (QSS) is observed in the drawdown response. The well is then pumped at a higher constant rate until a new QSS is achieved. The process is repeated for additional flow rates.
Simon A. Mathias, Lindsay C. Todman
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Step-drawdown tests: linear and nonlinear head loss components
Hydrogeology Journal, 2022 AbstractCoefficients B and C of the Jacob (1947) equation, usually derived from step-drawdown tests, are commonly attributed to “aquifer losses” and “well losses”, respectively. This paper analyzes and separates the linear laminar, nonlinear laminar and turbulent losses occurring during flow from an aquifer to a screened well. From this, one can derive
Georg J. Houben, Michael A. P. Kenrick
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Photovoltaic pumping tests: A novel supervision method for photovoltaic water pumping systems [PDF]
HeliyonWater pumps powered by photovoltaic energy, often named ‘photovoltaic water pumping systems’ (PVWPS), offer a promising solution for improving water access in developing regions.
Ange Sahuquet +8 more
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Erratum to: An approach to interpretation of step drawdown tests [PDF]
Hydrogeology Journal, 2011 The work used two approaches for fixing the boundary to fluid flow. In the first approach the boundary to fluid flow was assumed to be length from the well bottom to the pumping water level. The second approach was based on the assumption of the boundary length being the total length of the screen (See section Calculation of Reynold’s number on page ...
S. Shekhar
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A generalised solution for step-drawdown tests including flow dimension and elasticity
Water SA, 2001 Step-drawdown and multi-rate tests present convenient tools for the estimation of the long-term yield of boreholes. However, the analytical methods commonly employed for the analysis of such tests are all based on the assumption that the drawdown in a borehole is a linear function of the discharge rate.
Van Tonder, GJ, Botha, JF, Van Bosch, J
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SOFTWARE SOLUTIONS FOR ANALYZING DATA OBTAINED FROM STEP DRAWDOWN TEST
Mugla Journal of Science and TechnologyStep-drawdown tests play a critical role in determining the hydraulic properties of aquifers and in the management of groundwater resources. The data obtained from these tests allow for the analysis of parameters such as aquifer hydraulic conductivity, specific yield, and storage coefficient.
Tolga Necati Yaylım, Bedri Kurtuluş
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Evaluation of Low or High Permeability of Fractured Rock using Well Head Losses from Step-Drawdown Tests [PDF]
Journal of the Korean Radioactive Waste Society, 2012 PURPOSE: An evaluation method of high or low permeability of a fractured rock aquifer using a well head loss term from a step drawdown test is provided to identify a primary aquifer section in wells and compare the status of a high or low permeability section.
Byung-Woo Kim +3 more
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Interpreting Step‐Drawdown Pumping Test Undergoing Confined‐Unconfined Conversion with Well Loss
GroundwaterAbstract The step‐drawdown pumping test often experiences a transition from confined to unconfined conditions due to the continuously increasing pumping rate. However, the current well hydraulics model has not accurately interpreted this phenomenon. In this study, we developed an analytical solution to address the
Lu Zhang +8 more
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The Step-Drawdown Test and Non-Darcian Flow: A Critical Review of Theory, Methods and Practice [PDF]
Hydrology Research, 1982 Step-drawdown tests are usually carried out with succeeding steps of increased pumping yield, each step of equal duration of 1 hour. The background for this procedure is reviewed, and it is shown, that very often much shorter duration of steps is adequate. The analysis of step-tests is usually based on the formulas of Jacob or Rorabaugh.
Henrik Kærgaard
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