AnAqSim: Analytic Element Modeling Software for Multi‐Aquifer, Transient Flow

McLane, Charles

doi:10.1111/j.1745-6584.2011.00892.x

Cited by 6 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strack's interface potentials have been implemented in single‐layer analytic element modeling software such as GFLOW (Haitjema ). The approach presented here and implemented in the software AnAqSim (Analytic Aquifer Simulator) (McLane ; Fitts ) extends the use of these potentials to multilayer aquifer systems. Within a layer, saturated thickness and interface positions are determined by using the Dupuit approximation and Ghyben‐Herzberg equation, but modeled vertical leakage between layers accounts for vertical resistance.…”

Section: Overview Of Methodsmentioning

confidence: 99%

Analytic Element Modeling of Steady Interface Flow in Multilayer Aquifers Using AnAqSim

Fitts¹,

Godwin²,

Feiner³

et al. 2014

Groundwater

Self Cite

View full text Add to dashboard Cite

This paper presents the analytic element modeling approach implemented in the software AnAqSim for simulating steady groundwater flow with a sharp fresh-salt interface in multilayer (three-dimensional) aquifer systems. Compared with numerical methods for variable-density interface modeling, this approach allows quick model construction and can yield useful guidance about the three-dimensional configuration of an interface even at a large scale. The approach employs subdomains and multiple layers as outlined by Fitts (2010) with the addition of discharge potentials for shallow interface flow (Strack 1989). The following simplifying assumptions are made: steady flow, a sharp interface between fresh- and salt water, static salt water, and no resistance to vertical flow and hydrostatic heads within each fresh water layer. A key component of this approach is a transition to a thin fixed minimum fresh water thickness mode when the fresh water thickness approaches zero. This allows the solution to converge and determine the steady interface position without a long transient simulation. The approach is checked against the widely used numerical codes SEAWAT and SWI/MODFLOW and a hypothetical application of the method to a coastal wellfield is presented.

show abstract

Section: Overview Of Methodsmentioning

confidence: 99%

Analytic Element Modeling of Steady Interface Flow in Multilayer Aquifers Using AnAqSim

Fitts¹,

Godwin²,

Feiner³

et al. 2014

Groundwater

Self Cite

View full text Add to dashboard Cite

show abstract

Modelado semianalítico de flujo multicapa transitorio con TTim

Bakker

2013

Hydrogeol J

View full text Add to dashboard Cite

Groundwater modelling using an analytic element method and finite difference method: An insight into Lower Ganga river basin

et al. 2019

View full text Add to dashboard Cite

Groundwater flow modelling provides the water flow dynamics for the estimation and prediction of groundwater movement and its condition in the aquifer. The modelling helps for the management of the groundwater resources under various hydrological and anthropogenic stresses. In this paper, a modelling exercise was performed using the analytic element method (AEM) and finite difference method (FDM) for the part of Ganga river basin which includes the Varanasi district. Further compression was performed to understand the limitations and benefits of both AEM and FDM based on ease of model development, data requirement and their performances. The groundwater model was developed for the transient state condition based on data for the year 2004-2017. The results show that for most of the observed wells, the difference between the observed head and the simulated head is found in the 90% confidence level. It is found that the AEM does not require a fixed boundary condition which makes the development of the conceptual model less complicated. In the FDM, pumping wells are approximately located and averaged over the cell which becomes a cause of the inaccurate location of the wells. It is found that model development in the AEM is less complicated compared to the FDM. It can be concluded that in some cases AEM-based modelling is more accurate as compared to FDM-based flow modelling. This study can be very helpful for groundwater professionals in deciding the best suitable method for their study area and to avoid the complexity of the model.

show abstract

AnAqSim: Analytic Element Modeling Software for Multi‐Aquifer, Transient Flow

Cited by 6 publications

References 4 publications

Analytic Element Modeling of Steady Interface Flow in Multilayer Aquifers Using AnAqSim

Analytic Element Modeling of Steady Interface Flow in Multilayer Aquifers Using AnAqSim

Modelado semianalítico de flujo multicapa transitorio con TTim

Groundwater modelling using an analytic element method and finite difference method: An insight into Lower Ganga river basin

Contact Info

Product

Resources

About