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Well Test Analysis

Polar Coordinates

One 12” Pizza = Nine 4” Pizzas

Pizza

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diameter in inches

area

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Series1

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Polar Coordinates

Computing Drawdown from a Pumping Well: Theis

Computing Drawdown from a Pumping Well: Theis

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Computing Drawdown from a Pumping Well: Theis

Computing Drawdown from a Pumping Well: Theis

Example: Theis Eqn.

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Leaky, Confined Aquifer

No Water Drains From Confining Layer Solution

Test of Assumption #4

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Test of Assumption #7

Hantush-Jacob Formula

Leaky, Confined Aquifer Example 1

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Leaky, Confined Aquifer Example 1

Leaky, Confined Aquifer Example 1

Leaky, Confined Aquifer Example 1

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Leaky, Confined Aquifer Example 1

Some Water Drains From Confining Layer Solution

Some Water Drains From Confining Layer Solution

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Leaky, Confined Aquifer Example 2

Leaky, Confined Aquifer Example 2

Leaky, Confined Aquifer Example 2

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Leaky, Confined Aquifer Example 2

Summary Drawdown Responses for Confined Aquifers

Unconfined Aquifers

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Unconfined Aquifers: Assumptions

Unconfined Aquifers: Neuman’s Solution

Aquifer Parameters from Time-Drawdown Data

General Assumptions

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Confined Aquifer Parameters from Time-Drawdown Data

Steady Radial Flow Assumptions

Confined Aquifer Parameters from Time-Drawdown Data: Thiem Eqn.

Confined Aquifer Parameters from Time-Drawdown Data: Thiem Eqn.

What about Storativity?????

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Unconfined Aquifer Parameters from Time-Drawdown Data

Unconfined Aquifer Parameters from Time-Drawdown Data: Thiem Eqn.

Non-equilibrium Flow Conditions:Radial Flow Confined Aquifer

(Theis Method)

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Theis Curve

Curve Matching

Curve Matching Example

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Curve Matching Example

Curve Matching Example

Cooper-Jacob Method

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Cooper-Jacob Method Example

Distance Jacob Method

Distance Jacob Method Example

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Leaky Aquifer, No Storage

Leaky Confined Aquifer: Example

Leaky Confined Aquifer: Example

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Leaky Confined Aquifer: Example

Hantush Inflection Point Method

Hantush Inflection Point Method

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Leaky Confined with Storage

Leaky Confined with Storage

Leaky Confined with Storage

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Unconfined Aquifer

Unconfined Aquifer

Unconfined Aquifer

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Unconfined Aquifer Example

Unconfined Aquifer Example

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Well screened in part of aquifer

Slug Tests

Slug Tests

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Slug Tests

Slug Tests: Type Curves

Slug Tests: Example

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Specific Capacity Data

Empirical Relationship but Specific Capacity Data Routinely Collected

Intersecting Wells: Superposition

Sources/Sinks: Superposition

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Sources/Sinks: Superposition

Impact of Sources/Sinks