Results 101 to 110 of about 399,720 (138)

Calculation of Constant‐Rate Drawdowns from Stepped‐Rate Pumping Tests

Groundwater, 1989
ABSTRACT Drawdown and recovery data obtained for stepped‐ rate pumping tests can be used to calculate the drawdowns that would occur if the test were carried out a constant rate without stopping. The recovery phase of constant‐rate pumping tests can be analyzed by the same method because cessation of pumping can be treated as a step ...
openaire   +2 more sources

Well Loss Estimation: Variable Pumping Replacing Step Drawdown Test

Journal of Hydraulic Engineering, 2002
An optimization method is presented for simultaneous estimation of aquifer parameters and well loss parameters utilizing all the drawdowns observed during a variable rate pumping or multiple step pumping test. The proposed method does not require any graphical analysis.
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

Triggering mechanism of rainfall and reservoir water level dynamic change‐induced step‐like displacement for reservoir bank landslide

Earth Surface Processes and Landforms
Reservoir bank landslides in the Three Gorges Reservoir (TGR) area frequently show step‐like displacement characteristics under coupled reservoir water level (RWL) fluctuations and rainfall, posing significant challenges to hazard early‐warning systems ...
Haijia Wen, Yujie Li, Xiongfeng Wang, Yingqi Zeng, Fangyi Yan   +4 more
semanticscholar   +1 more source

Lithological and hydrodynamic characterization of the deep aquifer using logging techniques and pumping tests in the Fritissa Area, middle Moulouya, Morocco

Ecological Engineering & Environmental Technology
The current research is an attempt to precise the lithological nature and hydrodynamic characters of deep aquifer in the Fritissa region, Middle Moulouya, Morocco, under arid to semi-arid climate environments.
M. Driss, S. Ettazarini, Youssef Hahou, Abdelhadi Ifliliss   +3 more
semanticscholar   +1 more source

Estimation of optimal pumping rate by step-drawdown tests at combined well and open-closed loops geothermal systems

Journal of the geological society of Korea, 2018
Jong-Koo Mok, Bum-Ju Jang, Yu-Chul Park, J. Oh, Geun-Chun Lee, Ki-Joon Kim   +5 more
semanticscholar   +1 more source

Assessment of well performance criteria and aquifer characteristics using step-drawdown tests and hydrogeochemical data, west of Qena area, Egypt

, 2018
Fathy A. Abdalla, K. Moubark
semanticscholar   +1 more source

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
openaire   +2 more sources

Borehole restoration methods and their evaluation by step-drawdown tests: the case history of a detailed study in Northern Italy

Quarterly Journal of Engineering Geology, 1988
L. Clark, M. Radini, P. Bison
semanticscholar   +1 more source