Development of a spreadsheet-based model for transient groundwater modelling

Ankor, Martin J.; Tyler, Jonathan

doi:10.1007/s10040-019-01996-z

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…In order to make more reliable projections of future hydrological change, however, it is necessary to develop, calibrate and validate more sophisticated hydrological models which combine responsive lake water thermodynamics, surface-groundwater interaction and stable isotope geochemistry [e.g. (Hostetler and Bartlein, 1990;Jones and Imbers, 2010;Steinman et al, 2010;Ankor and Tyler, 2019). Such modelling exercises should be a priority in order to better understand the resilience of these important wetlands under future climate scenarios.…”

Section: Modelling Hydrological Change At Swallow Lagoon and Brown Lakementioning

confidence: 99%

Hydrological and Isotopic Variability of Perched Wetlands on North Stradbroke Island (Minjerribah), Australia: Implications for Understanding the Effects of Past and Future Climate Change

Tyler

Marshall

Schulz

et al. 2022

Front. Environ. Sci.

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Over the first two decades of the 21st century, many wetlands in eastern Australia exhibited declining water levels, causing concern for communities and environmental managers and raising questions about the roles of climate change and other human activity in these water level declines. In this context we examine the causes of water level variability in four wetlands on North Stradbroke Island (Minjerribah), in the humid subtropics of south-eastern Queensland, Australia, using a combination of hydrological and water isotope monitoring and modelling. North Stradbroke Island has a high concentration of wetlands perched above the regional water table, with cultural and ecological significance, and value for palaeoclimate research. From 2015 to 2019, wetland water depths decreased markedly at all sites, coinciding with increases in oxygen isotope ratios in surface waters. The data indicate that climate, specifically a decrease in precipitation relative to evaporation, was responsible for those declining water levels, and that groundwater extraction did not play a critical role. At two of the sites—both palustrine wetlands—declining surface water levels led to intermittent connectivity with the local perched aquifers. At the other two sites, which are both shallow lakes, the surface waters were constantly fed by perched groundwater. The hydrology of the two lakes was modelled using simple mass balance. However, in order to accurately model lake level change, it was necessary to vary catchment runoff and lake outflow via groundwater through time, highlighting complexity in projecting future hydrological change in these lakes. The long term resilience of these lakes depends on a combination of rainfall regime and the balance between catchment runoff and groundwater throughflow, the future of which is highly uncertain. As a consequence, continued efforts to project future hydroclimate and to model the complex hydrology of subtropical wetlands are essential.

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Section: Modelling Hydrological Change At Swallow Lagoon and Brown Lakementioning

confidence: 99%

Hydrological and Isotopic Variability of Perched Wetlands on North Stradbroke Island (Minjerribah), Australia: Implications for Understanding the Effects of Past and Future Climate Change

Tyler

Marshall

Schulz

et al. 2022

Front. Environ. Sci.

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“…It was pioneered by Olsthoorn (1985), who, in his Ph.D. thesis (Olsthoorn 1999), recalls working on groundwater flow modeling using the Lotus 1,2,3 program as early as 1983. Since then, many papers have been written in which the use of spreadsheets for steady-state and transient groundwater modeling have been published; some examples are the works by Akhter et al (2006), Ankor and Tyler (2019), Bair and Lahm (2006), Bhattacharjya (2011), Elfeki and Bahrawi (2015), Fox (1996), Karahan and Ayvaz (2005a), Karahan and Ayvaz (2005b), Molano (2014), Niazkar and Afzali (2015), Olsthoorn (1999), or Ousey (1986.…”

Section: Introductionmentioning

confidence: 99%

Teaching Numerical Groundwater Flow Modeling with Spreadsheets

Gómez‐Hernández

2022

Math Geosci

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The use of spreadsheets for numerical groundwater flow modeling is not a novelty; however, its potential in the classroom has not been emphasized enough. This Teachers Aid provides a step-by-step implementation of a steady-state, vertically integrated two-dimensional groundwater flow model in a confined irregular aquifer with boundary conditions of the three kinds and subject to pumping and recharge that will enhance the learning experience of students that are confronted for the first time with the numerical solution of the groundwater flow partial differential equation.

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