# Prince Edward Island Confined And Unconfined Aquifer Pdf

## Confined aquifer vulnerability induced by a pumping well

### ARTIFICIAL RECHARGE OF CONFINED AND UNCONFINED AQUIFER

Analytical Solution for Drainage and Recession from an. DEFINITIONS: UNCONFINED AND SEMI-CONFINED AQUIFER Unconfined aquifer: An unconfined aquifer, or water-table aquifer, is an aquifer bounded at the, Unconfined aquifers are where the rock is directly open at the surface of the ground and groundwater is directly recharged, for example by rainfall or snow melt. Confined aquifers are where thick deposits overly the aquifer and confine it from the.

### CEC hearing groundwater basics Nov1 06

TYPES OF AQUIFERS IDC-Online. 2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer., The thickness of confined aquifer (B) and original water before recharging of unconfined aquifer (h) are taken as a constant value equal to 10 m. Fig. 5: Recharge wells arranged on the corners of square..

In this article, the solution to the fuzzy second order unsteady partial differential equation (Boussinesq equation) is examined, for the case of an aquifer recharging from a lake. In the examined problem, there is a sudden rise and subsequent stabilization of the lake’s water level, thus the aquifer is recharging from the lake. The aquifer 3 Solution 1 - No water drains from the Confining Layer Assumptions - aquifer bounded on top by aquitard and unconfined aquifer (source bed); water table in source bed initially horizontal and

Unconfined upper aquifers are exposed at or near the ground surface and can be quite thin with little storage. When it rains or a river floods the aquifer’s pore As the aquifer is unconfined around the Daw Street wellfield, there is the potential for contamination from fertilisers or herbicides that are be applied to the nearby

declining water levels measured in observation wells for both the confined and unconfined aquifers over the last 40 years. The Keith The Keith rainfall station (number 25507) is located in the township of Keith and recorded 291 mm of rain in 2014. Figure 6.2 Pumping well with observation wells in unconfined aquifer This equation can be applied for a pumping well in a confined aquifer. 227 6 Pumping tests should be carried out with open-end discharge pipe in order to avoid back flow phenomena (i.e. P p =P atm). 7 Make sure that the water discharged during the test does not interfere with shallow aquifer tests (Jericho Area). 8

As the aquifer is unconfined around the Daw Street wellfield, there is the potential for contamination from fertilisers or herbicides that are be applied to the nearby include fractured unconfined rock, and confined sand and gravel aquifers. Construction of an artificial aquifer may be possible. 2 Practice Note 10 Aquifer Storage and Recovery Brisbane City Council Water Sensitive Urban Design Practice Note Series Page 2 of 6 The broad requirements of ASR systems include: protecting or improving groundwater quality where ASR is practiced ensuring that …

The storage coefficient and transmissivity are important aquifer parameters that are useful in assessing the ground‐water potential of an aquifer. For a nonleaky confined aquifer, these include fractured unconfined rock, and confined sand and gravel aquifers. Construction of an artificial aquifer may be possible. 2 Practice Note 10 Aquifer Storage and Recovery Brisbane City Council Water Sensitive Urban Design Practice Note Series Page 2 of 6 The broad requirements of ASR systems include: protecting or improving groundwater quality where ASR is practiced ensuring that …

In this article, the solution to the fuzzy second order unsteady partial differential equation (Boussinesq equation) is examined, for the case of an aquifer recharging from a lake. In the examined problem, there is a sudden rise and subsequent stabilization of the lake’s water level, thus the aquifer is recharging from the lake. The aquifer Transient confined-unconfined flow conversion caused by pumping in a confined aquifer (i.e., piezometric head drops below the top confined layer) is complicated, partly due to different hydraulic

20 Ground-Water Resource Availability, West Fork and White River Basin Unconfined (Water Table) Aquifer Aquitard Confined (Artesian) Aquifer Water-Table Well Three mechanisms are summarized including: an instantaneous response for confined aquifers; a delayed response due to borehole storage in confined and unconfined aquifers; and a …

An aquifer in an unconfined state has entirely different storage properties than an aquifer in the confined or artesian state. For a groundwater reservoir to be classified as unconfined, it must be shown that it is not confined by impermeable material (relatively speaking) and, furthermore, its water table cannot be confined from the effects of Confined and Unconfined Aquifers Respond Differently to Pumping The markedly different response of confined and unconfined aquifers to pumping (before the ground-water system returns to a new equilibrium) is demonstrated by calculations of drawdown resulting from a single pumping well in an idealized example of each type of aquifer (Figures A–1 and A–2). The numerical values used in the

Unconfined upper aquifers are exposed at or near the ground surface and can be quite thin with little storage. When it rains or a river floods the aquifer’s pore of a recent textbook on aquifer-test modeling, Walton (2007) provides examples of the use of WTAQ for analysis of aquifer tests in confined and unconfined aquifers. The analytical model developed by Moench combines and extends the work of Boulton (1954, 1963) and of Neuman (1972, 1974) to account for the release of water from the unsaturated zone above the water table. In Boulton’s approach

6 In an unconfined aquifer, T is not constant If drawdown is small relative to saturated thickness, confined equilibrium formulas can be applied with only minor errors Unconfined aquifer is recharged by lower confined aquifer The velocity (v) of the downward or upward vertical flow( Leakage) through the semi confining layer is proportional to to the difference between groundwater table and piezometric head in the Confined layers, which can be calculated by Darcy law. B. Unconfined aquifer is recharging Lower confined aquifer d. Upper confined aquifer is

Step Trend Analysis of Status Monitoring, Confined and Unconfined Aquifers Rick Copeland Watershed Monitoring Section “ROC Fest” May 2017 6 In an unconfined aquifer, T is not constant If drawdown is small relative to saturated thickness, confined equilibrium formulas can be applied with only minor errors

confined or unconfined aquifer The flow towards a well, situated in homogeneous and isotropic confined or unconfined aquifer is radially symmetric. The cone of depression caused due to constant pumping through a single well situated at (0,0) in a confined aquifer. include fractured unconfined rock, and confined sand and gravel aquifers. Construction of an artificial aquifer may be possible. 2 Practice Note 10 Aquifer Storage and Recovery Brisbane City Council Water Sensitive Urban Design Practice Note Series Page 2 of 6 The broad requirements of ASR systems include: protecting or improving groundwater quality where ASR is practiced ensuring that …

Water is released to a pumping well in a confined aquifer by consolidation of the aquifer framework and volume expansion of the water, whereas in the unconfined aquifer, the water produced comes from the drainable porosity of the aquifer. Consequently, rates of withdrawal from the confined system are generally much less because of the larger drawdowns experienced in these aquifer systems. The 2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer.

DEFINITIONS: UNCONFINED AND SEMI-CONFINED AQUIFER Unconfined aquifer: An unconfined aquifer, or water-table aquifer, is an aquifer bounded at the In the confined region beyond a radial distance R from the control well, flow is described by transmissivity and storativity; upon conversion, flow in the unconfined region is controlled by transmissivity and specific yield. Analysis involves matching the Moench and Prickett solution to drawdown data collected during a pumping test.

### Confined Aquifer Condition and Extraction Limits in the

CEC hearing groundwater basics Nov1 06. Three mechanisms are summarized including: an instantaneous response for confined aquifers; a delayed response due to borehole storage in confined and unconfined aquifers; and a …, 2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer..

### KGS--Bulletin 239--Is Sustainability a Viable Concept in

Groundwater abstraction and aquifer response in the Roe. confined aquifer primarily consists of the Renmark Group, as the Buccleuch Formation is relatively thin. In the Lower Limestone In the Lower Limestone Coast PWA, the confined aquifer is comprised of the Dilwyn Formation of the Gambier Basin, which is the equivalent of the Renmark 2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer..

The storage coefficient and transmissivity are important aquifer parameters that are useful in assessing the ground‐water potential of an aquifer. For a nonleaky confined aquifer, these Transient confined-unconfined flow conversion caused by pumping in a confined aquifer (i.e., piezometric head drops below the top confined layer) is complicated, partly due to different hydraulic

RESEARCH ARTICLE 10.1002/2016WR019101 Analytical solutions of seawater intrusion in sloping confined and unconfined coastal aquifers Chunhui Lu 1, … Confined and Unconfined Aquifers Respond Differently to Pumping The markedly different response of confined and unconfined aquifers to pumping (before the ground-water system returns to a new equilibrium) is demonstrated by calculations of drawdown resulting from a single pumping well in an idealized example of each type of aquifer (Figures A–1 and A–2). The numerical values used in the

Aquifer storage and recovery (ASR) is a means of introducing recycled water into underground aquifers (via direct injection (i.e. pumping or gravity) for subsequent extraction and reuse. It can be a low cost water storage alternative compared to surface storages and can minimise loss of water due to evaporation. The overriding consideration for introducing recycled water to aquifers is to confined or unconfined aquifer The flow towards a well, situated in homogeneous and isotropic confined or unconfined aquifer is radially symmetric. The cone of depression caused due to constant pumping through a single well situated at (0,0) in a confined aquifer.

As the aquifer is unconfined around the Daw Street wellfield, there is the potential for contamination from fertilisers or herbicides that are be applied to the nearby Unconfined Aquifer – water is in contact with atmospheric pressure – drill and well hit the water table Confined Aquifer – recharge upgradient forces water to flow down and get trapped

Unconfined aquifer is recharged by lower confined aquifer The velocity (v) of the downward or upward vertical flow( Leakage) through the semi confining layer is proportional to to the difference between groundwater table and piezometric head in the Confined layers, which can be calculated by Darcy law. B. Unconfined aquifer is recharging Lower confined aquifer d. Upper confined aquifer is Early-time response is controlled by the transmissivity and elastic storage coefficient and is analogous to the response of a confined aquifer. Late-time response is a function of transmissivity and specific yield (drainable porosity). At intermediate time, response is controlled by the aquifer's …

20 Ground-Water Resource Availability, West Fork and White River Basin Unconfined (Water Table) Aquifer Aquitard Confined (Artesian) Aquifer Water-Table Well • Change in hydraulic head (for unconfined aquifer) or potentiometric head (for confined aquifer) with time. • And, or compressibility of the mineral grains of the soil matrix forming

Show the most prospective regions for ASR, in both the confined and unconfined aquifers Identify potential for detention storage to harvest stormwater The regional maps produced are intended to be a guide for ASR potential (i.e. not a substitute Unconfined upper aquifers are exposed at or near the ground surface and can be quite thin with little storage. When it rains or a river floods the aquifer’s pore

The difference in aquifer response to abstraction in confined and unconfined aquifers is schematically illustrated in Figure 2 below. Figure 2. Schematic illustration of drawdown in response to pumping in confined (A) and unconfined (B) aquifers. Note that in unconfined aquifer water is physically drained from the aquifer while in the confined aquifer pumping causes a reduction in … Confined Aquifer Condition and Extraction Limits in the Tintinara Coonalpyn Prescribed Wells Area (PWA) unconfined water level rise equals confined water level rise). Figure 1: Water allocation and extraction in the Tolmer management area . Version 8, February 2011 . Figure 2: Water level trends in the Tolmer management area . Salinity monitoring of the confined aquifer in the Tolmer MA is

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## Moench and Prickett Pumping Test Solution for a Confined

Aquifer Storage and Recovery Townsville City Council. 2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer., Show the most prospective regions for ASR, in both the confined and unconfined aquifers Identify potential for detention storage to harvest stormwater The regional maps produced are intended to be a guide for ASR potential (i.e. not a substitute.

### Step Trend Analysis of Status Monitoring Confined and

Ground Water Word File Notes Aquifer Groundwater. Quantitative treatment of confined aquifers with fully penetration wells is easier than unconfined aquifers because in confined aquifers the saturation zone is completely defined by impervious layers and the streamflow line geometry remains parallel and does not change with time., An unconfined aquifer, also called a water-table aquifer, is an aquifer which has the water table as its upper boundary. Unconfined aquifers occur near the ground surface. The aquifer in the Yuma area is an unconfined aquifer, composed primarily of sand, gravel, clay and silt sediments deposited by the Colorado and Gila.

Figure 6.2 Pumping well with observation wells in unconfined aquifer This equation can be applied for a pumping well in a confined aquifer. 227 6 Pumping tests should be carried out with open-end discharge pipe in order to avoid back flow phenomena (i.e. P p =P atm). 7 Make sure that the water discharged during the test does not interfere with shallow aquifer tests (Jericho Area). 8 An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt). Groundwater can be extracted using a water well.

As the aquifer is unconfined around the Daw Street wellfield, there is the potential for contamination from fertilisers or herbicides that are be applied to the nearby Water is released to a pumping well in a confined aquifer by consolidation of the aquifer framework and volume expansion of the water, whereas in the unconfined aquifer, the water produced comes from the drainable porosity of the aquifer. Consequently, rates of withdrawal from the confined system are generally much less because of the larger drawdowns experienced in these aquifer systems. The

Aquifers Types: Unconfined and Confined Aquifers. Article shared by: ADVERTISEMENTS: Aquifer is made of two words ‘aqua’ and ‘ferre’ from Latin language. ‘Aqua’ means water and ‘ferre’ means ‘produce or bear’. Thus, aquifer is a geological composition which is porous and permeable. There is storage and transmission of water in it, as well as yielding of water to wells and 3 Solution 1 - No water drains from the Confining Layer Assumptions - aquifer bounded on top by aquitard and unconfined aquifer (source bed); water table in source bed initially horizontal and

Water is released to a pumping well in a confined aquifer by consolidation of the aquifer framework and volume expansion of the water, whereas in the unconfined aquifer, the water produced comes from the drainable porosity of the aquifer. Consequently, rates of withdrawal from the confined system are generally much less because of the larger drawdowns experienced in these aquifer systems. The The difference in aquifer response to abstraction in confined and unconfined aquifers is schematically illustrated in Figure 2 below. Figure 2. Schematic illustration of drawdown in response to pumping in confined (A) and unconfined (B) aquifers. Note that in unconfined aquifer water is physically drained from the aquifer while in the confined aquifer pumping causes a reduction in …

In this article, the solution to the fuzzy second order unsteady partial differential equation (Boussinesq equation) is examined, for the case of an aquifer recharging from a lake. In the examined problem, there is a sudden rise and subsequent stabilization of the lake’s water level, thus the aquifer is recharging from the lake. The aquifer Figure 6.2 Pumping well with observation wells in unconfined aquifer This equation can be applied for a pumping well in a confined aquifer. 227 6 Pumping tests should be carried out with open-end discharge pipe in order to avoid back flow phenomena (i.e. P p =P atm). 7 Make sure that the water discharged during the test does not interfere with shallow aquifer tests (Jericho Area). 8

Figure 6.2 Pumping well with observation wells in unconfined aquifer This equation can be applied for a pumping well in a confined aquifer. 227 6 Pumping tests should be carried out with open-end discharge pipe in order to avoid back flow phenomena (i.e. P p =P atm). 7 Make sure that the water discharged during the test does not interfere with shallow aquifer tests (Jericho Area). 8 3 Solution 1 - No water drains from the Confining Layer Assumptions - aquifer bounded on top by aquitard and unconfined aquifer (source bed); water table in source bed initially horizontal and

Confined Aquifer Condition and Extraction Limits in the Tintinara Coonalpyn Prescribed Wells Area (PWA) unconfined water level rise equals confined water level rise). Figure 1: Water allocation and extraction in the Tolmer management area . Version 8, February 2011 . Figure 2: Water level trends in the Tolmer management area . Salinity monitoring of the confined aquifer in the Tolmer MA is Unconfined aquifers are where the rock is directly open at the surface of the ground and groundwater is directly recharged, for example by rainfall or snow melt. Confined aquifers are where thick deposits overly the aquifer and confine it from the

An unconfined aquifer, also called a water-table aquifer, is an aquifer which has the water table as its upper boundary. Unconfined aquifers occur near the ground surface. The aquifer in the Yuma area is an unconfined aquifer, composed primarily of sand, gravel, clay and silt sediments deposited by the Colorado and Gila The storage coefficient and transmissivity are important aquifer parameters that are useful in assessing the ground‐water potential of an aquifer. For a nonleaky confined aquifer, these

of a recent textbook on aquifer-test modeling, Walton (2007) provides examples of the use of WTAQ for analysis of aquifer tests in confined and unconfined aquifers. The analytical model developed by Moench combines and extends the work of Boulton (1954, 1963) and of Neuman (1972, 1974) to account for the release of water from the unsaturated zone above the water table. In Boulton’s approach Hydrogeologic Framework for Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States—A Digital

Unconfined Aquifer – water is in contact with atmospheric pressure – drill and well hit the water table Confined Aquifer – recharge upgradient forces water to flow down and get trapped In this article, the solution to the fuzzy second order unsteady partial differential equation (Boussinesq equation) is examined, for the case of an aquifer recharging from a lake. In the examined problem, there is a sudden rise and subsequent stabilization of the lake’s water level, thus the aquifer is recharging from the lake. The aquifer

Aquifer storage and recovery (ASR) is a means of introducing recycled water into underground aquifers (via direct injection (i.e. pumping or gravity) for subsequent extraction and reuse. It can be a low cost water storage alternative compared to surface storages and can minimise loss of water due to evaporation. The overriding consideration for introducing recycled water to aquifers is to The thickness of confined aquifer (B) and original water before recharging of unconfined aquifer (h) are taken as a constant value equal to 10 m. Fig. 5: Recharge wells arranged on the corners of square.

20 Ground-Water Resource Availability, West Fork and White River Basin Unconfined (Water Table) Aquifer Aquitard Confined (Artesian) Aquifer Water-Table Well Transient confined-unconfined flow conversion caused by pumping in a confined aquifer (i.e., piezometric head drops below the top confined layer) is complicated, partly due to different hydraulic

Confined Aquifer Condition and Extraction Limits in the Tintinara Coonalpyn Prescribed Wells Area (PWA) unconfined water level rise equals confined water level rise). Figure 1: Water allocation and extraction in the Tolmer management area . Version 8, February 2011 . Figure 2: Water level trends in the Tolmer management area . Salinity monitoring of the confined aquifer in the Tolmer MA is limestones forming one unconfined aquifer system. Province 2 — Is located in the Murray Basin where the Murray Group limestone is unconfined and either crops out at the surface, or is overlain directly by younger sand units. Province 3 — Occurs in an area of the Murray Basin where the Murray Group limestone is confined by an overlying clay aquitard. 201088-002 Figure 1 Hydrogeological

Unconfined aquifers are where the rock is directly open at the surface of the ground and groundwater is directly recharged, for example by rainfall or snow melt. Confined aquifers are where thick deposits overly the aquifer and confine it from the declining water levels measured in observation wells for both the confined and unconfined aquifers over the last 40 years. The Keith The Keith rainfall station (number 25507) is located in the township of Keith and recorded 291 mm of rain in 2014.

Water is released to a pumping well in a confined aquifer by consolidation of the aquifer framework and volume expansion of the water, whereas in the unconfined aquifer, the water produced comes from the drainable porosity of the aquifer. Consequently, rates of withdrawal from the confined system are generally much less because of the larger drawdowns experienced in these aquifer systems. The Quantitative treatment of confined aquifers with fully penetration wells is easier than unconfined aquifers because in confined aquifers the saturation zone is completely defined by impervious layers and the streamflow line geometry remains parallel and does not change with time.

### Analytical Solution for Drainage and Recession from an

CEC hearing groundwater basics Nov1 06. Confined Aquifer Condition and Extraction Limits in the Tintinara Coonalpyn Prescribed Wells Area (PWA) unconfined water level rise equals confined water level rise). Figure 1: Water allocation and extraction in the Tolmer management area . Version 8, February 2011 . Figure 2: Water level trends in the Tolmer management area . Salinity monitoring of the confined aquifer in the Tolmer MA is, An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt). Groundwater can be extracted using a water well..

### Well Hydraulics Inside Mines

KGS--Bulletin 239--Is Sustainability a Viable Concept in. Aquifers Types: Unconfined and Confined Aquifers. Article shared by: ADVERTISEMENTS: Aquifer is made of two words ‘aqua’ and ‘ferre’ from Latin language. ‘Aqua’ means water and ‘ferre’ means ‘produce or bear’. Thus, aquifer is a geological composition which is porous and permeable. There is storage and transmission of water in it, as well as yielding of water to wells and limestones forming one unconfined aquifer system. Province 2 — Is located in the Murray Basin where the Murray Group limestone is unconfined and either crops out at the surface, or is overlain directly by younger sand units. Province 3 — Occurs in an area of the Murray Basin where the Murray Group limestone is confined by an overlying clay aquitard. 201088-002 Figure 1 Hydrogeological.

• Confined aquifer vulnerability induced by a pumping well
• CEC hearing groundwater basics Nov1 06
• Chapter 10 Aquifer Storage and Recovery Brisbane

• Unconfined upper aquifers are exposed at or near the ground surface and can be quite thin with little storage. When it rains or a river floods the aquifer’s pore Aquifer storage and recovery (ASR) is a means of introducing recycled water into underground aquifers (via direct injection (i.e. pumping or gravity) for subsequent extraction and reuse. It can be a low cost water storage alternative compared to surface storages and can minimise loss of water due to evaporation. The overriding consideration for introducing recycled water to aquifers is to

Unconfined aquifers are where the rock is directly open at the surface of the ground and groundwater is directly recharged, for example by rainfall or snow melt. Confined aquifers are where thick deposits overly the aquifer and confine it from the Unconﬁned Aquifer Flow Theory - from Dupuit to present Phoolendra K. Mishra and Kristopher L. Kuhlman April 16, 2013 1 1 Abstract 2 Analytic and semi-analytic solution are often used by researchers and practicioners to esti-3 mate aquifer parameters from unconﬁned aquifer pumping tests. The non-linearities asso-4 ciated with unconﬁned (i.e., water table) aquifer tests makes their

“unconfined” or “semi confined”. The same aquifer may be free, confined and The same aquifer may be free, confined and semi-confined by sector and area of study. Unconfined aquifers are where the rock is directly open at the surface of the ground and groundwater is directly recharged, for example by rainfall or snow melt. Confined aquifers are where thick deposits overly the aquifer and confine it from the

Hydrogeologic Framework for Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States—A Digital unconfined or confined. An unconfined aquifer has no overlying aquitard or aquiclude (Figure 4). Where there are multiple levels of aquifers, the uppermost aquifer typically is unconfined. Vertical recharge of an unconfined aquifer by rainwa-ter or irrigation water that filters downward through the soil is not restricted. The water table at the top of the unconfined aquifer can migrate freely

2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer. The storage coefficient and transmissivity are important aquifer parameters that are useful in assessing the ground‐water potential of an aquifer. For a nonleaky confined aquifer, these

confined to unconfined conditions as a result of groundwater abstraction. During the During the period of abstraction when the aquifer is confined, the groundwater storage in the A. Unconfined aquifer B. Impermeable layer C. Confined aquifer . The water cycle, or hydrological cycle, describes the endless circulation of water between ocean, atmosphere and land. It is a vast, complex process driven by the sun’s energy. Because it can’t be seen, groundwater is often forgotten. But it is an important and proportionately large part of the land-based component of the

Show the most prospective regions for ASR, in both the confined and unconfined aquifers Identify potential for detention storage to harvest stormwater The regional maps produced are intended to be a guide for ASR potential (i.e. not a substitute Confined and Unconfined Aquifers Respond Differently to Pumping The markedly different response of confined and unconfined aquifers to pumping (before the ground-water system returns to a new equilibrium) is demonstrated by calculations of drawdown resulting from a single pumping well in an idealized example of each type of aquifer (Figures A–1 and A–2). The numerical values used in the

2.7.3 Steady Flow to a Well: Unconfined Aquifer For the case of a pumped well located in an unconfined aquifer (Figure 10) the steady state discharge conditions are similar to that of confined aquifer. DEFINITIONS: UNCONFINED AND SEMI-CONFINED AQUIFER Unconfined aquifer: An unconfined aquifer, or water-table aquifer, is an aquifer bounded at the

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