Download or read book Interaction Between Groundwater and Surface Water in a Coastal Wetlands System in South Western Australia written by S. Marimuthu and published by . This book was released on 2003 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction Between Surface Water and Groundwater in a Coastal Wetlands System written by Selvarajah Marimuthu and published by . This book was released on 2005 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Hydrogeochemical Investigation of the Surface Water and Groundwater Interactions of a Semi arid Wetland System Western Australia written by Lindsay Bourke and published by . This book was released on 2011 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated abstract] A 932 ha subcatchment and its associated wetland suite, located in the semi-arid wheatbelt region Western Australia, was investigated in this study. The lower part of the subcatchment exhibits environmental degradation due to altered hydrology resulting from clearing of deep-rooted perennial vegetation. Two main potential threats exist; firstly, upgradient migration of hypersaline groundwater from a regional primary saline valley floor; secondly, increased water and solute loads due to enhanced recharge within the local subcatchment. The hydrological function of the subcatchment and individual wetlands, and uncertainties relating to spatial scales of influence was investigated through combing physical hydrological and hydrochemical methods. A long-term trend of rising groundwater levels within the study area is evident since the clearing of vegetation, and levels have continued to rise since 2006 at about +0.06 m/yr. A ten-fold increase in the TDS at a hyposaline wetland since 1970 indicates active discharge of both stored and replenished water and solutes to the lower catchment. These trends are occurring in spite of a declining regional rainfall trend since the mid 1970's. The aquifers in the lower discharge area appear to be near full capacity although the subcatchment is yet to reach a post-clearing hydrological equilibrium. Significant groundwater TDS and density gradients occur across the study area, increasing rapidly down gradient in both the unconfined and semi-confined aquifers. The ionic compositions of groundwater, surface water and rainfall are dominated by Cl- and Na-, with overall composition being largely proportional to seawater. Cl-/Br- weight ratios indicate that halite dissolution is unlikely to be a primary factor in elevated ionic concentration. Hence, solutes are chiefly sourced from marine-derived aerosols in rainfall. Elevated nutrient concentrations (high N and lower P) were observed, although the absence of algal blooms in wetlands indicates that P is likely a limiting nutrient. Fractionation enriched stable isotopes (eD and e18O) and greater ion concentrations are observed in the deep hypersaline semi-confined aquifer compared to the regional primary saline valley floor aquifer. This indicates the occurrence of reflux brines beneath the hypersaline wetland, resulting in the export of solutes to the underlying aquifers. Seasonal changes in both ionic and stable isotope (eD and e18O) composition within the deep hypersaline semi-confined aquifer further suggest that water and solute exchange is driven by both groundwater head and density gradients. Excess recharge in the upper recharge domain is expressed down gradient at the lower discharge domain as both groundwater discharge and enhanced surface water flows...
Download or read book Groundwater surface Water Interaction Along Gingin Brook Western Australia written by and published by . This book was released on 2011 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater the Strategic Resource written by A. D. Allen and published by . This book was released on 1997 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater surface Water Interaction written by Corinna Abesser and published by . This book was released on 2008 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected papers from a symposium on A new Focus on Integrated Analysis of Groundwater-Surface Water Systems, held during the International Union of Geodesy and Geophysics XXIV General Assembly in Perugia, Italy, 11-13 July 2007.
Download or read book Integrated Groundwater Management written by Anthony J Jakeman and published by Springer. This book was released on 2016-08-05 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to document for the first time the dimensions and requirements of effective integrated groundwater management (IGM). Groundwater management is a formidable challenge, one that remains one of humanity’s foremost priorities. It has become a largely non-renewable resource that is overexploited in many parts of the world. In the 21st century, the issue moves from how to simply obtain the water we need to how we manage it sustainably for future generations, future economies, and future ecosystems. The focus then becomes one of understanding the drivers and current state of the groundwater resource, and restoring equilibrium to at-risk aquifers. Many interrelated dimensions, however, come to bear when trying to manage groundwater effectively. An integrated approach to groundwater necessarily involves many factors beyond the aquifer itself, such as surface water, water use, water quality, and ecohydrology. Moreover, the science by itself can only define the fundamental bounds of what is possible; effective IGM must also engage the wider community of stakeholders to develop and support policy and other socioeconomic tools needed to realize effective IGM. In order to demonstrate IGM, this book covers theory and principles, embracing: 1) an overview of the dimensions and requirements of groundwater management from an international perspective; 2) the scale of groundwater issues internationally and its links with other sectors, principally energy and climate change; 3) groundwater governance with regard to principles, instruments and institutions available for IGM; 4) biophysical constraints and the capacity and role of hydroecological and hydrogeological science including water quality concerns; and 5) necessary tools including models, data infrastructures, decision support systems and the management of uncertainty. Examples of effective, and failed, IGM are given. Throughout, the importance of the socioeconomic context that connects all effective IGM is emphasized. Taken as a whole, this work relates the many facets of effective IGM, from the catchment to global perspective.
Download or read book Isotope Hydrology and Integrated Water Resources Management written by Pradeep Kumar Aggarwal and published by . This book was released on 2004 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 174 extended abstracts of papers presented during 11 technical sessions of the 11th symposium in the series that was convened during 19-23 May 2003 in Vienna. Nearly 275 participants from 69 countries participated in the symposium to discuss the past, present and future of isotope applications in hydrology and climate research.
Download or read book The Becher Wetlands A Ramsar Site written by Christine Semeniuk and published by Springer Science & Business Media. This book was released on 2007-01-03 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a landmark study of the Holocene evolution and functioning of a suite of seasonal wetland basins in the temperate coastal zone of Western Australia, which were added to the the Ramsar List of Wetlands of International Importance because of their setting, their method of formation and deepening, their history of infilling, their complex hydrological mechanisms, and their dynamic hydrochemical and vegetation responses.
Download or read book Groundwater Management Practices written by Angelos N. Findikakis and published by CRC Press. This book was released on 2011-06-08 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater is an indispensable resource in many parts of the world, where it supports domestic water supply, irrigated agriculture and industry. Its increased, and often intensive, use during the last half century has created problems and raised concerns regarding the potential depletion of local aquifers, water quality degradation and various geologic hazards such as land subsidence and sinkholes. This volume includes contributions by experts from several countries who describe different groundwater management practices in their part of the world and discuss measures and actions in response to the challenges associated with the sustainability of groundwater use and the protection of the groundwater environment, as well as the evolution of legal and institutional framework needed for their implementation. It discusses past and present practices and various aspects of the regulatory and legal framework of groundwater management in Japan, China, India, Iran, Australia, the United States, Spain, Denmark, Switzerland and the European Union, and reviews recent efforts to improve the management of transboundary aquifer resources.
Download or read book The Interactions between Sediments and Water written by Brian Kronvang and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on sediments as a pollutant in natural freshwater and marine habitats, and as a vector for the transfer of chemicals such as nutrients and contaminants. Sediment-water research is carried out all over the world within a variety of disciplines. The selected papers cover three main topics relating to assessment and/or restoration of disturbed watersheds, sediment-water linkages in terrestrial and aquatic environments and evaluation of sediment and ecological changes in marine and freshwater habitats. Innovative research in both developed and less developed countries is included. Both fundamental research, insight into applied research and system management are covered. The volume will also appeal to readers involved in sediment geochemistry and dynamics, aquatic habitats, water quality, aquatic ecology, river morphology, restoration techniques and catchment management.
Download or read book Report Geological Survey of Western Australia written by Geological Survey of Western Australia and published by . This book was released on 1969 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface water acidification arising from aquifers impacted by agricultural practices written by Adam Michael Lillicrap and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated] Groundwater is an important resource to humans and ecosystems, especially in arid and semiarid environments where it may be the only source of water. Its value as a resource, however, is reduced when it becomes contaminated through anthropogenic activities. This research focuses on acidic groundwater which remains poorly understood but can have a significant impact on surface water environments, leading to both direct and indirect stress on organisms and ecosystem health. Acidification of groundwater can be caused by atmospheric deposition (acid rain), acid mine drainage and disturbance of acid sulfate soils. Often as a result of agricultural practices. Agricultural practices have caused acidification of groundwater dependent environments in south-western Australia (SWA) where the draining of coastal wetlands for horticulture exposed naturally occurring sulfides that oxidised to generate acid. Additionally, within the inland areas of SWA, ephemeral aquifers provided low salinity neutral baseflow to waterways, however following the clearing of native vegetation for agriculture, naturally occurring deeper acid-saline groundwater now discharge to waterways. It is estimated that there are over 350 km of acidified waterways in the Avon catchment of SWA that have resulted from agricultural practices, though the acidification of surface waters is spatially and temporally heterogeneous. This research aimed to further our understanding of SWA acidic groundwater sources, controls and impacts, through a series of field investigations, statistical analysis of historical groundwater and mapping data, and hydrological and geochemical modelling. Finally, since the management of acidification impacts remains challenging within broad-acre semi-arid landscapes, a pilot scale passive treatment system was built to test its suitability for remediating acidified stream waters. This thesis firstly presents an investigation into acidification processes and their impacts on a coastal wetland disturbed by agricultural practices, with a particular focus on surface water - groundwater interactions and the resulting hydrological and geochemical processes. These investigations found that the lowering of watertables, especially with the aid of drainage, over the dryer summer months led to oxidation of sulfides within surficial soil profiles, generating substantial acidity within the unsaturated zone. With the onset of winter rains, the watertable rose redissolving the acid products. The groundwater continued to rise to form a series of disconnected pools, some of which were extremely acid due to the redissolved salts. The pools eventually linked, establishing surface water connectivity, acid dispersion and subsequent discharge from the site. A water balance model for the site was developed and it was identified that manipulation of watertables through control of drainage and placement of organic mulches over sulfidic sediments and soils to minimise evaporation are possible management options for the site.
Download or read book Environmental Biology written by Mike Calver and published by Cambridge University Press. This book was released on 2009 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Environmental Biology offers a fresh, problem-solving treatment of the topic for students requiring a biology background before further study in environmental science, sustainable development or environmental engineering. It begins with an environmental theme that carries through the text, using three major case studies with a regional focus. Key foundational knowledge is introduced and developed as the text progresses, with students encouraged to integrate their accumulated learning to reach solutions. A comprehensive coverage of scientific method, including field experimentation and field techniques, is an important part of the approach. While emphasising the environmental theme, the book introduces all facets of the biology discipline, including cell biology, evolution, ecology, conservation and restoration."--Publisher.
Download or read book Estuaries of Australia in 2050 and beyond written by Eric Wolanski and published by Springer Science & Business Media. This book was released on 2013-08-28 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book addresses the questions: Is Australia’s rapidly growing human population and economy environmentally sustainable for its estuaries and coasts? What is needed to enable sustainable development? To answer these questions, this book reports detailed studies of 20 iconic Australian estuaries and bays by leading Australian estuarine scientists. That knowledge is synthesised in time and space across Australia to suggest what Australian estuaries will look like in 2050 and beyond based on socio-economic decisions that are made now, and changes that are needed to ensure sustainability. The book also has a Prologue by Mr Malcolm Fraser, former Prime Minister of Australia, which bridges environmental science, population policy and sustainability.
Download or read book Groundwater and Ecosystems written by Luis Ribeiro and published by CRC Press. This book was released on 2013-06-13 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater resources are facing increasing pressure from consuming and contaminating activities. There is a growing awareness that the quantitative and qualitative preservation of groundwater resources is a global need, not only to safeguard their future use for public supply and irrigation, but also to protect those ecosystems that depend partially or entirely on groundwater to maintain their species composition and natural ecological processes. Known as groundwater dependent ecosystems (GDEs), they have been a fast-growing field of research during the last two decades. This book is intended to provide a diverse overview of important studies on groundwater and ecosystems, including a toolbox for assessing the ecological water requirements for GDEs, and relevant case studies on groundwater/surface-water interactions, as well as the role of nutrients in groundwater for GDEs and ecosystem dependence (vegetation and cave fauna) on groundwater. Case studies are from Australia (nine studies) and Europe (12 studies from nine countries) as well as Argentina, Canada and South Africa. This book is of interest to everybody dealing with groundwater and its relationship with ecosystems. It is highly relevant for researchers, managers and decision-makers in the field of water and environment. It provides up-to-date information on crucial factors and parameters that need to be considered when studying groundwater-ecosystem relationships in different environments worldwide.
Download or read book Biogeochemistry of Wetlands written by K. Ramesh Reddy and published by CRC Press. This book was released on 2022-09-10 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: The globally important nature of wetland ecosystems has led to their increased protection and restoration as well as their use in engineered systems. Underpinning the beneficial functions of wetlands are a unique suite of physical, chemical, and biological processes that regulate elemental cycling in soils and the water column. This book provides an in-depth coverage of these wetland biogeochemical processes related to the cycling of macroelements including carbon, nitrogen, phosphorus, and sulfur, secondary and trace elements, and toxic organic compounds. In this synthesis, the authors combine more than 100 years of experience studying wetlands and biogeochemistry to look inside the black box of elemental transformations in wetland ecosystems. This new edition is updated throughout to include more topics and provide an integrated view of the coupled nature of biogeochemical cycles in wetland systems. The influence of the elemental cycles is discussed at a range of scales in the context of environmental change including climate, sea level rise, and water quality. Frequent examples of key methods and major case studies are also included to help the reader extend the basic theories for application in their own system. Some of the major topics discussed are: Flooded soil and sediment characteristics Aerobic-anaerobic interfaces Redox chemistry in flooded soil and sediment systems Anaerobic microbial metabolism Plant adaptations to reducing conditions Regulators of organic matter decomposition and accretion Major nutrient sources and sinks Greenhouse gas production and emission Elemental flux processes Remediation of contaminated soils and sediments Coupled C-N-P-S processes Consequences of environmental change in wetlands# The book provides the foundation for a basic understanding of key biogeochemical processes and its applications to solve real world problems. It is detailed, but also assists the reader with box inserts, artfully designed diagrams, and summary tables all supported by numerous current references. This book is an excellent resource for senior undergraduates and graduate students studying ecosystem biogeochemistry with a focus in wetlands and aquatic systems.
