Ryan Vogwill

HGE · NA

Quantification of long-term hydrologic change in groundwater often requires the comparison of states pre- and post-change. The assessment of these changes in ungauged catchments using numerical models and other quantitative methods is particularly difficult from a conceptual point of view and due to parameter non-uniqueness and associated uncertain...

Secondary dryland salinity is a global land degradation issue. Drylands are often less developed, less well instrumented and less well understood, requiring us to adapt and impose understanding from different hydro-geomorphological settings that are better instrumented and understood. Conceptual models of secondary dryland salinity, from wet and mo...

Microbial mats are organosedimentary structures organized as multilayered carpets of microbial communities. Within the microbial mat microenvironment, the occurrence of different metabolic processes can lead to local chemistry alterations, inducing carbonate precipitation. Carbonate accretion in lithifying microbial mats typically induces microbial...

Secondary dryland salinity is a global land degradation issue. Because drylands are often less-developed, less-well instrumented and less-well understood, we often adapt and impose an understanding from different hydro-geomorphological settings. Dryland catchments are likely to exhibit some functional qualities of wet and hydrologically-connected l...

The Swan Coastal Plain in Western Australia has been undergoing rapid urban growth and with it comes two primary water related concerns. The first is the spread of development into areas with shallow water tables which requires costly water management to control groundwater level rise; the second is the limited groundwater allocation available in a...

The diversity of vegetation in semi-arid, ephemeral wetlands is determined by niche availability and species competition, both of which are influenced by changes in water availability and salinity. Here, we hypothesise that ignoring physiological differences and competition between species when managing wetland hydrologic regimes can lead to a decr...

Urbanization is a primary driver of nutrient export in coastal catchments; however, estimating the rate of export from urbanizing, remote and ungauged communities with episodic rainfall characteristics has rarely been reported in tropical and subtropical areas. In this study, the coastal catchment of Roebuck Bay near Broome, northwestern Australia,...

Groundwater is integral to many human and environmental systems but there are significant challenges in dealing with the impact of anthropogenic activities on groundwater systems. These challenges need innovative solutions. This book contains a wide range of content, from a discussion of the Australian regulatory framework for unconventional hydroc...

The existence of the unique thrombolite reef at Lake Clifton, Western Australia, relies on a delicate hydrological balance between freshwater input and evaporation driven salinity. Time series hydrographic, in conjunction with hydro-geochemical and stable isotope data, are applied to understand the lake's hydrological regime for the time period 200...

Species composition and structure are important properties that can influence the extent to which people value a natural element. Hence these two properties can provide a means to directly manage natural elements to meet values-based goals. With this principle in mind, we studied soil seed bank assembly in two wetland vegetation elements recognized...

High-resolution hydrographic data, hydro-geochemical and isotopic analysis are combined to investigate the current hydrological functioning of the RAMSAR listed Lake Clifton, Western Australia, and potential threats to the lakes Thrombolite deposits. Water level and electrical conductivity data for lake, sub-surface and deep ground waters imply con...

Roebuck Bay near Broome, Western Australia, is an area with high biodiversity, social and economic values that has been subject to rapid growth of urban areas, and the associated impact to runoff quantity and quality. We present an analysis to synthesize spatial-temporal changes in impervious surfaces, and their relative impacts, on changing surfac...

This study demonstrates the co-evolution between hydrology and vegetation, as well as the non-linear responses of vegetation dynamics to climate forcing, both being strongly influenced by salinisation. Being particularly interested in semi-arid regions, we applied an ecohydrological model over the climate gradient found in southwest Western Austral...

Nonlinear interactions between physical, chemical and biological factors determine the spatio-temporal extent of flooding, the level of salinisation and the vegetation dynamics in wetlands subjected to a certain climate signal. These interactions were studied using an ecohydrological model of a wetland in a semi-arid climate designed to account for...

This study improves the spatial understanding of the magnitude of the groundwater acidification issue in a poorly buffered sandy aquifer in Western Australia. The study provides more information to assess the risk the acidification poses to groundwater dependent ecosystems of the Gnangara Mound. Groundwater acidification (pH < 5) was identified on...

Evergreen plants inhabiting ephemeral wetlands endure long dry spells interspersed with periods of flooding (or inundation). Inundation events are likely to be important for plant water use and growth, but few studies have linked the physiology of plants to hydrological processes during flood. We investigated the link between changes in the soil ph...

Governed by a series of non-linear feedback mechanisms among water, vegetation and decomposers, carbon storage within wetlands is important on a global scale. However, the effect that climatic fluctuations have on those mechanisms is not well documented. In this study, we introduce a mechanistic model connecting hydrology, vegetation and microbial...

Assisted colonization-the deliberate translocation of species from unsuitable to suitable regions-is a controversial management tool that aims to prevent the extinction of populations that are unable to migrate in response to climate change or to survive in situ. The identification of suitable translocation sites is therefore a pressing issue. Corr...

Governed by a series of biotic and abiotic processes, the size of carbon storage in wetlands is important on a global scale. However, the various feedback mechanisms and the effect that climatic fluctuations have on them are not well documented. In this study, we introduce a mechanistic model connecting hydrology, vegetation and carbon to investiga...

Wetland ecosystems contain various feedback mechanisms between their abiotc and biotic components. The feedbacks are triggered by climate and propagate into patterns of environment partitioning based on distinct zones of hydrological function that vary in time and space. This partitioning co-evolves with vegetation, defines carbon metabolism and cr...

The Drummond Nature Reserve (DNR), a high-value conservation area 100 km northeast of Perth, Western Australia, contains two rare freshwater claypans and a diverse range of rare and threatened vascular plants. Groundwater/surface-water interactions were investigated via isotopic (delta O-18 and delta D) and major ion analysis. The groundwater chemi...

Located in the south–west coastal zone of Western Australia are numerous tufa deposits, which are registered as Threatened Ecological Communities (TEC). The tufas occur in near-shore shallow bedrock settings and are associated with local groundwater discharge. Depositional facies, mineralogy, elemental chemistry and water quality were investigated...

Clearing vegetation for traditional agriculture diminishes native habitat and reduces plant transpiration, leading to increased groundwater recharge and onset of dryland salinization due to rising groundwater and mobilization of salt stores in the soil profile. This change in hydrology and salinity can also negatively affect biodiversity in many se...

Widespread clearing of native vegetation in Southwest Western Australia has led to land degradation associated with rising groundwater, secondary salinisation and waterlogging. Re-establishing deep-rooted perennial vegetation across parts of the landscape is one technique for managing land degradation. Alley farming is an agroforestry practice wher...

Widespread clearing of native vegetation in Southwest Western Australia has led to land degradation associated with rising groundwater, secondary salinisation and waterlogging. Land degradation can be controlled by re-establishing native deep rooted perennial vegetation across parts of the landscape. Alley farming is an agroforestry practice where...