Results 1 to 10 of about 14,012 (158)
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
doaj +2 more sources
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
exaly +2 more sources
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
doaj +2 more sources
FABM-NflexPD 1.0: assessing an instantaneous acclimation approach for modeling phytoplankton growth [PDF]
Geoscientific Model Development, 2021 Coupled physical–biogeochemical models can generally reproduce large-scale patterns of primary production and biogeochemistry, but they often underestimate observed variability and gradients.
O. Kerimoglu +3 more
doaj +1 more source
Toward coupling of groundwater drawdown and pumping time in a constant discharge
Applied Water Science, 2022 Groundwater is considered an essential water resource in arid and semi-arid regions such as Iran. This study used a copula-based approach to analyze the joint frequency of groundwater level and the duration of groundwater pumping with a constant ...
Mehdi Dastourani +1 more
doaj +1 more source
Applied Water Science, 2023 The sustainability of groundwater aquifers requires evaluating several parameters, the most important of which are hydraulic parameters. Therefore, the essential aim of this research is to develop a management plan for the Moghra aquifer in order to ...
Maged El Osta +3 more
doaj +1 more source
Bayesian estimation of the transmissivity spatial structure from pumping test data [PDF]
, 2017 Estimating the statistical parameters (mean, variance, and integral scale) that define the spatial structure of the transmissivity or hydraulic conductivity fields is a fundamental step for the accurate prediction of subsurface flow and contaminant ...
Copty, Nadim K. +3 more
core +2 more sources
Freshwater-salt water interface dynamics during pumping tests
Acque Sotterranee, 2019 Freshwater-salt water interface (FSI) location is very important information for decision maker in managing coastal aquifer system, however, its temporal change have been hard to get using conventional method such as EC monitoring at one or several fixed
Yongcheol Kim +2 more
doaj +1 more source
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
openaire +1 more source
Sharper asset ranking from total drawdown durations [PDF]
, 2017 The total duration of drawdowns is shown to provide a moment-free, unbiased, efficient and robust estimator of Sharpe ratios both for Gaussian and heavy-tailed price returns. We then use this quantity to infer an analytic expression of the bias of moment-
Challet, Damien
core +2 more sources