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Torch et al 2013 + the importance of hydraulic groundwater theory

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Answered by Anonymous
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[1] Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean‐Yves Parlange (Cornell University) with respect to the current state‐of‐the‐art understanding in hydraulic groundwater theory. Forming the basis of many applications in catchment hydrology, ranging from drought flow analysis to surface water‐groundwater interactions, hydraulic groundwater theory simplifies the description of water flow in unconfined riparian and perched aquifers through assumptions attributed to Dupuit and Forchheimer. Boussinesq (1877) derived a general equation to study flow dynamics of unconfined aquifers in uniformly sloping hillslopes, resulting in a remarkably accurate and applicable family of results, though often challenging to solve due to its nonlinear form. Under certain conditions, the Boussinesq equation can be solved analytically allowing compact representation of soil and geomorphological controls on unconfined aquifer storage and release dynamics. The Boussinesq equation has been extended to account for flow divergence/convergence as well as for nonuniform bedrock slope (concave/convex). The extended Boussinesq equation has been favorably compared to numerical solutions of the three‐dimensional Richards equation, confirming its validity under certain geometric conditions. Analytical solutions of the linearized original and extended Boussinesq equations led to the formulation of similarity indices for baseflow recession analysis, including scaling rules, to predict the moments of baseflow response. Validation of theoretical recession parameters on real‐world streamflow data is complicated due to limited measurement accuracy, changing boundary conditions, and the strong coupling between the saturated aquifer with the overlying unsaturated zone. However, recent advances are shown to have mitigated several of these issues. The extended Boussinesq equation has been successfully applied to represent baseflow dynamics in catchment‐scale hydrological models, and it is currently considered to represent lateral redistribution of groundwater in land surface schemes applied in global circulation models. From the review, it is clear that Wilfried Brutsaert and Jean‐Yves Parlange stimulated a body of research that has led to several fundamental discoveries and practical applications with important contributions in hydrological modeling.

Answered by Anonymous
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The importance of hydraulic groundwater theory in catchment

hydrology: The legacy of Wilfried Brutsaert and Jean-Yves Parlange

Peter A. Troch,

1

Alexis Berne,

2

Patrick Bogaart,

3

Ciaran Harman,

4

Arno G. J. Hilberts,

5

Steve W. Lyon,

6

Claudio Paniconi,

7

Valentijn R. N. Pauwels,

8

David E. Rupp,

9

John S. Selker,

10

Adriaan J. Teuling,

11

Remko Uijlenhoet,

11

and Niko E. C. Verhoest

12

Received 1 March 2013; revised 21 June 2013; accepted 8 July 2013; published 4 September 2013.

[

1

] Based on a literature overview, this paper summarizes the impact and legacy of the

contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with

respect to the current state-of-the-art understanding in hydraulic groundwater theory.

Forming the basis of many applications in catchment hydrology, ranging from drought flow

analysis to surface water-groundwater interactions, hydraulic groundwater theory simplifies

the description of water flow in unconfined riparian and perched aquifers through

assumptions attributed to Dupuit and Forchheimer. Boussinesq (1877) derived a general

equation to study flow dynamics of unconfined aquifers in uniformly sloping hillslopes,

resulting in a remarkably accurate and applicable family of results, though often

challenging to solve due to its nonlinear form. Under certain conditions, the Boussinesq

equation can be solved analytically allowing compact representation of soil and

geomorphological controls on unconfined aquifer storage and release dynamics. The

Boussinesq equation has been extended to account for flow divergence/convergence as well

as for nonuniform bedrock slope (concave/convex). The extended Boussinesq equation has

been favorably compared to numerical solutions of the three-dimensional Richards

equation, confirming its validity under certain geometric conditions. Analytical solutions of

the linearized original and extended Boussinesq equations led to the formulation of

similarity indices for baseflow recession analysis, including scaling rules, to predict the

moments of baseflow response. Validation of theoretical recession parameters on real-world

streamflow data is complicated due to limited measurement accuracy, changing boundary

conditions, and the strong coupling between the saturated aquifer with the overlying

unsaturated zone. However, recent advances are shown to have mitigated several of these

issues. The extended Boussinesq equation has been successfully applied to represent

baseflow dynamics in catchment-scale hydrological models, and it is currently considered to

represent lateral redistribution of groundwater in land surface schemes applied in global

circulation models. From the review, it is clear that Wilfried Brutsaert and Jean-Yves

Parlange stimulated a body of research that has led to several fundamental discoveries and

practical applications with important contributions in hydrological modeling

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