Sensitivity analysis and determination of streambed. Determination of skin and aquifer parameters for a slug test with wellboreskin effect hundder yeh, yenju chen institute of environmental engineering, national chiao tung university, 75 poai street, hsinchu 30039, taiwan. The free aquifer is such in which there is free shallow water in contact with air and atmospheric pressure, so that its pressure is actually equal to the atmospheric pressure. Identification of aquifer parameters from residual drawdowns. In this paper, a curvefitting method is described to determine the aquifer characteristics for a multiple well system. Determination of karst aquifer characteristics using physicochemical parameters 295 the kerendrijab thrust fault with more than 40 km length acted in the southwestern flank of the ra and thrusted the asmari formation over the aghajari formation. Determination of hydraulic parameters of semiinfinite aquifers using marquardt algorithm taskan, cuneyt m. Determination of aquifer parameters for a multiple well system yavuz corapcioglu department of engineering sciences, middle east technical university, ankara, turkey received 28 may 1976, revised 25 february 1977 abstract. Ppt aquifer parameter estimation powerpoint presentation. At the free water table, the groundwater is at atmospheric pressure.
Introduction to groundwater and aquifer slideshare. Using the resulting values of aquifer parameters, the drawdowns were recalculated and compared to the original data in order to define best values of aquifer parameters for the seven test sites. Targac, wattenbarger and startzman 1990 developed two aif aquifer influence function type curves for aquifers. Coordinate transformation of the obtained activity curve was applied for the calculation of the porosity from experimental results. This was carried out by drilling three test wells and three observation wells in the. These are storage coefficient s and transmissivity t. Determination of karst aquifer characteristics using. According to the existing data, the thesis combined the water level recovery fitting of the entire curve fitting with dupuit formula of artesian well, determining the sp value and hydrogeological parameters of aquifer. Matching method zekai sen professor of hydrogeology, faculty of earth sciences, king abdulaziz university, p. Albertson department of environmental sciences, university of virginia. Pdf determination of aquifer protective capacity using dar. Geoelectric sounding for the determination of aquifer. A curvefitting method is described to determine the storage coefficient and transmissivity of an extensive confined aquifer.
Aquifer parameters in order to assess groundwater potential in any area and to evaluate the impact of pumpage on groundwater regime, it is essential to know the aquifer parameters. The estimated ratio of storage coefficient to transmissivity of the confined aquifer ranges from 1169. Assuming the aquifer is homogeneous and isotropic, the fluid moves only in one direction through the control volume. The application of geophysical methods in combination with pumping tests provides a costeffective and efficient alternative to estimate aquifer parameters. If this level is above the ground surface, the well is a freeflowing or artesian well. Geophysical sounding for the determination of aquifer. Determination of darzarrouk parameters for prediction of. Determination of aquifer parameters of hand dug well for. Pdf in order to determine the groundwater resources and potentials of the khanewal district of pakistan, a geophysical method in combination with. The aquifer parameters resulting from the three methods were evaluated and compared to each other. The pressure of the water in confined aquifers is usually higher than atmospheric pressure, which is why when a well is bored into the aquifer the water rises up the well tube, to a level higher than the aquifer figure 2.
The details of pumping test and the determination of aquifer parameters from pumpingtest data analysis are given in lessons and 14, respectively. Determination of aquifer parameters based on measurements of. Determination of aquifer parameters based on measurements. The nonequilibrium equation permits determination of the aquifer parameters s and t by means of pumping tests of wells. Determination of streambed leakance using inverse parameter estimation methods is not commonly reported. In this study, nineteen schlumberger vertical electrical soundings ves were occupied in parts of bayelsa state using a maximum current electrode separation ranging beweeen 300 400 m with the aim of. Determination of aquifer parameters from geosounding data. This study introduces two new estimation approaches for the slug test, the time shift method tsm and arclength matching method amm, to identify aquifer parameters in a reliable and accurate manner, which was established on the idea that any. The equation is widely applied in practice and is preferred over the equilibrium equation because 1 a value for s can be determined, 2 only one observation. Valley, arizona, using several classical and current methods by. Determination of skin and aquifer parameters for a slug. The method yields values of transmissivity and storage coefficient which are in good agreement with the results of the classically known techniques.
An aquifer test or a pumping test is conducted to evaluate an aquifer by stimulating the aquifer through constant pumping, and observing the aquifers response in observation wells. Psco comanche station no aquifer determination memorandum facility description 2 annual report to document the nine sample events performed and to describe the hydrogeologic site conditions relative to the definition of an aquifer. The different characteristics of aquifer parameters and their implications on pumpingtest analysis by j. In case of unconfined aquifers, the latter is called specific yield. Comanche station no aquifer determination memorandum 1. Recession flow analysis for aquifer parameter determination article pdf available in water resources research 347 july 1998 with 1 reads how we measure reads. Pdf when fitting hydraulic models of groundwater flow to pumping test data, bayesian inference provides a framework for quantifying the. A confined aquifer is a completely saturated aquifer bounded above and below by aquicludes.
The classical methods of nonsteady pumping test analysis are mostly graphical in nature and are, therefore, subject to. Determination of processes affecting groundwater quality in the coastal aquifer beneath puri city, india. May 12, 2016 hydraulic conductivity k by its area, aquifer can be classified as. Aquifertest analysis consisted of manual and automatic curve. Determination of aquifer parameters using geoelectrical. If the aquifer gas reservoir radii relationship is greater than 10 the aquifer is considered to be infinite and its water providing capability is higher than finite aquifer size. Determination of aquifer parameters from well tides.
Most of the techniques for the estimation of aquifer hydraulic parameters were introduced for porous media. The different characteristics of aquifer parameters and. Recession flow analysis for aquifer parameter determination. The users manual button will display a pdf document of the manual, which. Halil onder january 2004, 79 pages in this study, transmissivity and storage coefficient of a semiinfinite, confined, homogeneous and isotropic aquifer, where the flow is one. A case of agbani sandstone aquifer, enugu state, southeastern nigeria. Ugwu2 1department of geology and mining, enugu state university of science and technology, enugu, nigeria. Transmissivity and storativity consider the most important parameter in each aquifer due to the reality of their effect on the aquifer properties. The most important parameters used in groundwater hydrology to characterize an aquifer are transmissivity and storage coefficient. Aquifer parameters determination for large diameter wells. A curvefitting method is described to determine the storage coefficient and transmissivity of an extensive confined.
Estimation of aquifer parameters using pumping tests iopscience. The gmrbvas is a highly productive sand and gravel aquifer system contained in. These parameters divide the groundwater resources into four aquifer potential zones with specific ranges of. Determination of darzarrouk parameters for prediction of aquifer protective capacity. Using the resulting values of aquifer parameters, the drawdowns were recalculated and compared to the original data in order to define best values of. By the same token, figures 4 and 5 shows that the total amount of. Many techniques, approaches and tools were used in this research to achieve the methodology. However, in the case of limited pumping test data, these parameters may be estimated using the dar zurrock parameters from geophysical sounding. Pdf determination of aquifer protective capacity using. Determination of aquifer parameters from step tests and. Aug 30, 2002 read aquifer parameters determination for large diameter wells using neural network approach, journal of hydrology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Aquifer parameters at a certain site can be estimated by conducting a pumping test. The effective porosity of a dolomite aquifer was determined by tracing a pulse of radioactive k 3 co 60 cn 6 between two wells 250 meters apart.
Determination of aquifer hydraulic parameters from pumping test. Electrical resistivity method was applied to determine hydraulic conductivity and transmissivity in areas. An unconfined aquifer is a partly saturated aquifer bounded below by an aquiclude and above by the free water table or phreatic surface figure 2. The aquifer parameters like hydraulic conductivity and transmissivity are. Determination of aquifer parameters from step tests and intermittent pumping data. Aquifer tests are useful in determining hydraulic properties of waterbearing layers and confining beds and can be used to estimate well yields. Determination of aquifer influence functions from field data. Preliminary determination of epicenters subscriptions to the periodical preliminary determination of. Determination of aquifer protective capacity using darzorrouk parameters. Mathematical implications of hydrogeological conditions. Read aquifer parameters determination for large diameter wells using neural network approach, journal of hydrology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Khan 2, journal of the american water resources association on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Ground water issue suggested operating procedures for aquifer pumping tests. P, drews influence functions data jerseyproduction researchco, tulsa, okla. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Modelling for aquifer parameters determination 76 figure 2. Electrical resistivity method was applied to determine hydraulic. The slug test is still one of the simplest and costeffective methods to interpret the hydraulic parameters for aquifer analysis. Estimation of hydraulic parameters from an unconfined. The aquifer parameters estimated from the geoelectrical method for 48 ves points using dar zarrouk parameter transverse unit resistance are in agreement with results obtained from pump test.
This study applies an inverse method to determine the streambed leakance and aquifer hydraulic proper. S 1 piduguralla well water, s 2 nugendla bore well water, s 3. Determination of aquifer parameters of hand dug well for uunguwar galadima sabo, kaduna a hand dug well was subjected to a number of pumping tests. The pumping test is one of a series of soil investigation work needed to determine the aquifer parameters of groundwater in a particular area 1. In this study, nineteen schlumberger vertical electrical soundings ves were occupied in parts of bayelsa state using a maximum current electrode separation ranging beweeen 300 400 m with the aim of estimating the transmissivity of the. Parlange department of geography and environmental engineering, johns hopkins university, baltimore, maryland john d. The aquifer parameters of transmissivity and hydraulic conductivity were calculated from the pump test data using aquifer test pro software for seven wells. Pdf identification of aquifer parameters from pumping test data.
Determination of aquifer hydraulic parameters from pumping. Estimation of hydraulic parameters from an unconfined aquifer. Identification of aquifer parameters is required for the assessment and management of. Water attains a level in the ground which all available and interconnected spaces in the soil or rock are saturated. The asmari formation encompasses the main aquifer of the ra, which is.
Khan 2, journal of the american water resources association on deepdyve, the largest online rental service for scholarly research with thousands. Modelling for aquifer parameters determination 74 modelling is a tool that can be used for understanding of a groundwater system and its behaviour so as to predict its future response. The determination of aquifer parameters through pumping tests has become a standard step in theevaluation of groundwater resource potential of an area freeze and cherry 1979. Summers and associates, box 684, socorro, new mexico 87801. Estimation of aquifer hydraulic parameters using darzurrock parameters is well known and has been extensively discussed by. Determination of confined aquifer parameters by sushil k. A case study of umuogba in omuma local government area of rivers state, nigeria. Confined aquifer pumping test analysis waterloo hydrogeologic. Base of aquifer initial water table moisture content water table groundwater flow q estimation of hydraulic parameters from an unconfined aquifer test conducted in a glacial outwash deposit, cape cod, massachusetts u. Using artificial neural network to simultaneous hydraulic parameters is one of these techniques. P, mansoor mansoori department of civil engineeringosmania university university college of engineering, osmania university, hyderabad, andhra pradesh india i. Pdf recession flow analysis for aquifer parameter determination. Determination of skin and aquifer parameters for a slug test.
Determination of aquifer parameters from step tests and intermittent pumping data yuksel k. The water table is not flat but slope the hills down the valley sides towards the river. The recession flow analysis of brutsaert and nieber 1977 extended by troch et al. Determination of hydraulic characteristics and yield of aquifers. Determination of hydrogeological parameters of aquifer using. A method has been developed by which the slope between any two successive data points on a time. Homogenous area if hydraulic conductivity k is same in any area of aquifer hetergenous area if there is any differences of k in aquifer by moving direction of groundwater flow. Determination of aquifer parameters using regression analysis, by irfan a. The storage coefficient or storativity is defined as the volume of water released from storage per unit area of the aquifer per unit decline in hydraulic head. Determination of processes affecting groundwater quality in. The analysis panel contains the forum for calculating the aquifer parameters.
Kumar scientist f national institute of hydrology roorkee india 2. Aquifer testing is a common tool that hydrogeologists use to characterize a system of aquifers, aquitards and flow system boundaries. Aquifer system gmrbvas has been a water source since the early 19th century, and domestic and industrial growth in the great miami river valley can be directly attributed to plentiful groundwater resources. Determination of hydrogeological parameters of aquifer. Data obtained from a pump test usually consist of a time series of waterlevel measurements in the pumped well and observation welles after pumpage is initiated. Determination of aquifer parameters from well tides rhoads. Mohanty abstract variability of groundwater quality parameters is linked to various processes such as weathering. Abstract the expression is a handy tool for predicting aquifer parameters using all the drawdown and recovery data obtained during step. The hydraulic characteristics of subsurface aquifers are important properties. Determination of aquifer parameters using geoelectrical sounding. This type of aquifer does not have a layer of waterproof material above them. View enhanced pdf access article on wiley online library html view download pdf for.
Transmissivity and storativity of an aquifer are usually determined by analysis of steady or nonsteady pumping test data. Sensitivity analysis and determination of streambed leakance. Since such parameters as permeability have a wide impact in the water influx behavior, armenta 2003. An unconfined aquifer groundwater level coincides with the surface and is in direct. Background of study and problem formation the use of aquifers is increasing as both a source of water supply and. The determination of aquifer parameters with the aid of. Determination of hydraulic characteristics and yield of aquifers underlying vekol.
Groundwater flow directions and estimation of aquifer. The determination of accurate estimates of aquifer hydraulic characteristics is dependent on the availability of reliable data. The average hydraulic conductivity 450 feet per day based on the aquifer test is reasonable for glacial. Pdf determination of aquifer parameters using geoelectrical. A pumping test in essence involves abstracting water from a well at a known rate and then observing the reduction or decline in water. S 1 piduguralla well water, s 2 nugendla bore well water, s 3 epuru well water, s 4 vinukonda bore well water, s 5 naramalapadu bore well water, s 6 bollapalli bore well water s7 karempudi bore well water and s8 naguleru bore well water. Zhenga abstract the concepts of twoway coordinates and oneway coordinates are used to describe the different characteristics of two key. Transmissivity and storage coefficient of the semiconfined part of the aquifer were 50,000 feet squared per day and 5x104, respectively. Unlike the laboratory methods, the aquifer is not disturbed by pumping test, and hence the reliability of pumping test is superior to the laboratory methods. Determination of processes affecting groundwater quality. The aim of this study was to determine the aquifer parameters in erho, nigeria.
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