| Application | Conceptual Model |
|---|---|
| Excavation Dewatering – Unconfined Aquifer Equivalent Well model with axially symmetric radial flow. Typical applications include Mines, pits, quarries and construction dewatering with sidewall seepage. |  |
| Excavation Dewatering – Confined Aquifer Equivalent Well model with axially symmetric radial flow. Typical applications include mines, pits, quarries and construction dewatering with sidewall seepage | 
|
| Excavation Dewatering – Mixed Aquifer Equivalent Well model with axially symmetric radial flow. Typical applications include mines, pits, quarries and construction dewatering with sidewall seepage. Applicable for confined aquifers transitioning to unconfined. |  |
| Excavation Dewatering – Confined Aquifer (Superposition of Wells) Superposition of wells method is applicable to confined aquifers, but can also be used on unconfined and mixed aquifers if drawdown is relatively small (<10% aquifer thickness). Applicable for mines, pits, quarries and construction dewatering with sidewall seepage |
|
| Discharge into excavation through base Equivalent Well model with axially symmetric radial flow where flow is through base of excavation only. Applicable to mines, pits, quarries and construction dewatering with impermeable walls (secant piles) | 
|
| Discharge into excavation through base and pit walls Equivalent Well model with axially symmetric radial flow applicable for 2 layer dewatering of mines, pits, quarries and construction dewatering | 
|
| Excavation Dewatering – Unconfined Aquifer Flow to slot model with linear flow – applicable for mines, pits, quarries, construction dewatering with sidewall seepage and rivers and streams. |  |
|
Excavation Dewatering – Confined Aquifer Flow to slot model with linear flow – applicable for mines, pits, quarries, construction dewatering with sidewall seepage and rivers and streams |
|
| Excavation Dewatering – Mixed Aquifer Flow to slot model with linear flow – applicable for aquifers transitioning from confined to unconfined. Used in mines, pits, quarries, construction dewatering with sidewall seepage and rivers, streams and drains | < |
Further Reading
Construction Dewatering and Groundwater Control: New Methods and Applications. For more on Successive Steady State method see:
Analytical Modeling of Ground-Water Impacts by Mining. | |
Useful Equations
A working index of classic analytical groundwater equations
This page presents a curated collection of well-established, back-of-the-envelope analytical equations that engineers and geoscientists use for early-stage estimates and conceptual checks. These equations are distinct from the analytic element modeling approach on which Anaqsim is based.
Most of the equations link to an information card which provides the equations, how to use them, and what limitations are associated with each approach. Some also include case-studies to show how these analytical equations perform on real projects.
* This table is best viewed from your laptop/desktop rather than a mobile!
Construction Dewatering & Mining
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