Martin S. Andersen

Seasonality defines groundwater recharge thresholds across Australia

Margaret A. Shanafield, Andy Baker, Martin S. Andersen, Stacey C. Priestley et autres

Abstract Reliable prediction of groundwater recharge from rainfall is crucial to water management but is scientifically challenging. Previous studies have demonstrated that caves, mines, and tunnels provide useful “windows” for observing rainfall recharge timing and thresholds (i.e., amount of rainfall in a …

au (code pays fourni par la source)

Classification and Conceptualization of Karst Recharge Processes Through Spectral and Change Point Analysis of Drip Water Dynamics

Danyang Sun, Andy Baker, Martin S. Andersen, Liza K. McDonough et autres

Abstract Karst aquifers are notoriously heterogeneous, making it challenging to characterize recharge dynamics using traditional, static indicators. Percolating (drip) water records, when analyzed at high temporal resolution, offer insights into flow mechanisms in karst vadose zones. This study utilized karst caves to …

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Connecting Kaporin's condition number and the Bregman log determinant divergence

Andreas Bock, Martin S. Andersen

This paper presents some theoretical results relating the Bregman log determinant matrix divergence to Kaporin's condition number. These can be viewed as nearness measures between a preconditioner and a given matrix, and we show under which conditions these two functions coincide. We …

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Assessing Spatial Heterogeneity of Episodic Groundwater Recharge Responses in Water-Limited Environments Using Transfer Function Modelling

Muqing Dong, Martin S. Andersen, Gabriel Christopher Rau, Andy Baker

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When Does Rainfall Become Recharge?

Stacey C. Priestley, Andy Baker, Margaret A. Shanafield, Wendy A Timms et autres

Counting drips in caves is helping to reveal how much precipitation is needed to start refilling underground aquifers.

Coastal Wetland Restoration Effects on Carbon Dynamics: A Groundwater Perspective

Mahmood Sadat‐Noori, Martin S. Andersen, Helen Rutlidge, William C. Glamore

Abstract Coastal wetlands are critical components of the global carbon cycle, yet many have been degraded by drainage and land‐use changes, releasing stored carbon and exacerbating climate change. Interest in wetland restoration is increasing globally due to their carbon storage capacity, ecosystem …

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Groundwater Discharge: A Major Driver of Global Methane Emissions from Aquatic Environments

Rea Camile Maglaya, Mahmood Sadat‐Noori, Martin S. Andersen

Abstract Methane is a potent greenhouse gas, and aquatic environments such as wetlands, lakes, rivers, and estuaries are recognized as significant natural sources of methane emissions. However, a major gap in current methane budgets is the limited understanding of methane contributions from …

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How Alluvial Storage Controls Spatiotemporal Water Balance Partitioning in Intermittent and Ephemeral Stream Systems

E. Zarate, Martin S. Andersen, Gabriel Christopher Rau, R. I. Acworth et autres

Abstract The hydrological dynamics of intermittent rivers and ephemeral streams (IRES) impacts the availability of water to riparian ecosystems, the height of downstream runoff peaks, and the replenishment of groundwater systems. Despite its significance, the influence of superficial geology on IRES flow …

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Groundwater Recharge of Fractured Rock Aquifers in SE Australia Is Episodic and Controlled by Season and Rainfall Amount

Stacey C. Priestley, Andy Baker, Margaret A. Shanafield, Wendy A Timms et autres

Abstract Sustainable management of groundwater resources requires a comprehensive understanding of groundwater recharge; including when and under what conditions groundwater recharge occurs. However, recharge is one of the least understood hydrologic processes. Here we show how event‐scale rainfall recharge thresholds vary over …

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Hydrogeological implications of fault-related folding in a Triassic braided sandstone

Timothy C. McMillan, Titus A. Murray, Martin S. Andersen, Wendy A Timms et autres

Hydrogeological implications of fault-related folding in a Triassic braided sandstone

Groundwater recharge of fractured rock aquifers in SE Australia is episodic and controlled by season and rainfall amount

Stacey C. Priestley, Andy Baker, Margaret A. Shanafield, Wendy A Timms et autres

Sustainable management of groundwater resources requires a comprehensive understanding of groundwater recharge; including when and under what conditions groundwater recharge occurs. However, recharge is one of the least understood hydrologic processes. Here we show how event-scale rainfall recharge thresholds vary over a …

au (code pays fourni par la source)

Groundwater driven carbon fluxes in a restored coastal saltmarsh wetland: Implications for coastal wetland restoration

Mahmood Sadat‐Noori, Martin S. Andersen, Katrina Waddington, Jamie Ruprecht et autres

• Hydrological export of the five main carbon components from a restored saltmarsh wetland were measured. • Groundwater-driven fluxes of alkalinity, DIC, DOC, CO 2 , and CH 4 were estimated using radon. • The contribution of groundwater to surface water carbon …

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