Results 91 to 100 of about 817 (127)

Step‐Drawdown Test Needs Critical Review ^a

Groundwater, 1969
Abstract A review of the literature and a study of a number of field tests shows that the presently used analysis and interpretation of step‐drawdown tests can be misleading. The efficiency of a well is defined. The usefulness of the step‐drawdown test is outlined and a hypothesis for reduction in specific capacity is offered.
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Discussion on ‘The analysis and planning of step drawdown tests’ by L. Clark

Quarterly Journal of Engineering Geology, 1978
May I congratulate Lewis Clark on his paper covering the analysis and planning of step drawdown tests. I think the subject of well performance is due for a ‘shake-up’ and this paper will hopefully initiate some useful scientific discussion in the right direction. I have two main criticisms to make.
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The analysis and planning of step drawdown tests: a clarification

Quarterly Journal of Engineering Geology, 1979
I have received letters from Mr D. M. Milne and Dr P. F. Worthington pointing out an error in the application of the analytical methods in this paper, (published in 1977 in Q. Jl Engng Geol . 12 , 125–143). I would therefore like to take this opportunity to clarify the matter.
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Evaluation of Traditional and Nontraditional Optimization Techniques for Determining Well Parameters from Step-Drawdown Test Data

Journal of Hydrologic Engineering, 2006
Adequate knowledge of the hydraulic characteristics of production wells is indispensable for the proper development and management of wells and for the selection of suitable pumps. In this study, the characteristic hydraulic parameters of production wells were determined by the widely used graphical analysis of step-drawdown pumping test data as well ...
Madan K. Jha, Abhilekh Kumar, G. Nanda, G. Bhatt   +3 more
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Interpreting Step‐Drawdown Pumping Test Undergoing Confined‐Unconfined Conversion with Well Loss

Groundwater
Abstract 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, Hua Zhao, Ling Wang, Jianmei Liu, Qi Zhu, Na Li, Zhang Wen, Yizhao Wang, Dian Wang   +8 more
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Investigation of the Variation in Well Performance over Time Using Step Drawdown Tests

2017
The purpose of this study is to investigate thevariation in well performance over years by performing step drawdown test. Thewell used in this study was drilled by Neojen Engineering in the unconfinedaquifer in Bursa Küçük Sanayi region and is 27 meters deep. The first stepdrawdown test was carried out on November 2, 2012. The test was repeated onMarch
ERYILMAZ TÜRKKAN, Gökçen, KORKMAZ, Serdar   +1 more
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Step‐drawdown tests

International Journal of Water Resources Development, 1991
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Transient analysis of a step-drawdown test using a time-varying well-loss equation

Hydrogeology Journal, 2022
Hyowon An, Kyoochul Ha, Eunhee Lee
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A three-step support strategy for relatives of patients dying in the intensive care unit: a cluster randomised trial

Lancet, The, 2022
Nancy Kentish-Barnes, Sylvie Chevret, Sandrine Valade   +2 more
exaly  

Principle of superposition versus control volume finite difference approach in analyzing the step-drawdown test data

International Journal of Environmental Science and Technology, 2023
L. N. Gunawardhana, S. Ahmed, A. Sana, M. S. Baawain   +3 more
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