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The world atlas of rivers, estuaries, and deltas
From the Congo and the Mekong to the Seine and the Mississippi, Earth's rivers carve through landscapes before coursing into the world's oceans through estuaries and deltas. Their inexorable flow carries sediment and more, acting as lifeblood for a variety of ecosystems and communities. More than any other surface feature of Earth, rivers, estuaries, and deltas are vitally important to our economic and social well-being, and our management of them often sits at the sharp edge of today's most pressing environmental challenges. The World Atlas of Rivers, Estuaries, and Deltas takes readers on an unforgettable tour of these dynamic bodies of water, explaining how they function at each stage of their flow. Combining maps and graphics with informative essays and beautiful photos, this invaluable reference book will give you a new appreciation for the power that rivers, estuaries, and deltas wield. Features a wealth of colour photos, maps, and infographics. Brings together invaluable perspectives from leading experts. Describes the rich biodiversity associated with the world's rivers, estuaries, and deltas. Explains how rivers, estuaries, and deltas work, from river networks to deltaic floodplains, and sheds light on the erosion, movement, and deposition of sediment. Describes the anatomy of rivers, estuaries, and deltas, from channel geometry and river planforms to estuarine shape and delta morphology. Examines the ecology and ecosystems of rivers, estuaries, and deltas and how humans interact with these environments. Additional topics include damming, climate change, water use, pollution, resource management, and planetary health, as well as future perspectives on these vital landscapes.
BOOK
Estuarine ecohydrology
This book focuses on the principal components of an estuary. Although each chapter contains rigorous specialist knowledge, it is presented in an accessible way that encourages multidisciplinary collaboration among such fields as hydrology, ecology and mathematical modeling. Estuarine Ecohydrology demonstrates how one can quantify an estuarine ecosystem's ability to cope with human stresses. The theories, models, and real-world solutions presented will serve as a toolkit for designing a management plan for the ecologically sustainable development of an estuary. * Appropriate for use as a textbook and as a reference* Focuses on the principal components of an estuary* Presents theories, models, and real-world solutions to serve as a toolkit for designing a management plan for the ecologically sustainable development of an estuary
eBook
Georges River Blues
The lower Georges River, on Dharawal and Dharug lands, was a place of fishing grounds, swimming holes and picnics in the early twentieth century. But this all changed after World War II, when rapidly expanding industry and increasing population fell heaviest on this river, polluting its waters and destroying its bush. Local people campaigned to defend their river. They battled municipal councils, who were themselves struggling against an explosion of garbage as population and economy changed. In these blues (an Australian term for conflict), it was mangroves and swamps that became the focus of the fight. Mangroves were expanding because of increasing pollution and early climate change. Councils wanted to solve their garbage problems by bulldozing mangroves and bushland, dumping garbage and, eventually, building playing fields. So they attacked mangroves as useless swamps that harboured disease. Residents defended mangroves by mobilising ecological science to show that these plants nurtured immature fish and protected the river's health. These suburban resident action campaigns have been ignored by histories of the Australian environmental movement, which have instead focused on campaigns to save distant 'wilderness’ or inner-city built environments. The Georges River environmental conflicts may have been less theatrical, but they were fought out just as bitterly. And local Georges River campaigners – men, women and often children – were just as tenacious. They struggled to ‘keep bushland in our suburbs’, laying the foundation for today’s widespread urban environmental consciousness.
eBook
Estuaries
This volume provides researchers, students, practising engineers and managers access to knowledge, practical formulae and new hypotheses for the dynamics, mixing, sediment regimes and morphological evolution in estuaries. The objectives are to explain the underlying governing processes and synthesise these into descriptive formulae which can be used to guide the future development of any estuary. Each chapter focuses on different physical aspects of the estuarine system - identifying key research questions, outlining theoretical, modeling and observational approaches, and highlighting the essential quantitative results. This allows readers to compare and interpret different estuaries around the world, and develop monitoring and modeling strategies for short-term management issues and for longer-term problems, such as global climate change. The book is written for researchers and students in physical oceanography and estuarine engineering, and serves as a valuable reference and source of ideas for professional research, engineering and management communities concerned with estuaries.
eBook
Comparing futures for the Sacramento-San Joaquin Delta
An ecosystem in freefall, a shrinking water supply for cities and agriculture, an antiquated network of failure-prone levees—this is the Sacramento-San Joaquin Delta, the major hub of California's water system. Written by a team of independent water experts, this analysis of the latest data evaluates proposed solutions to the Delta's myriad problems. Through in-depth economic and ecological analysis, the authors find that the current policy of channeling water exports through the Delta is not sustainable for any interest. Employing a peripheral canal-conveying water around the Delta instead of through it—as part of a larger habitat and water management plan appears to be the best strategy to maintain both a high-quality water supply and at the same time improve conditions for native fish and wildlife. This important assessment includes integrated analysis of long term ecosystem and water management options and demonstrates how issues such as climate change and sustainability will shape the future.
eBook
Salinity and Tides in Alluvial Estuaries
The book describes an integrated theory that links estuary shape to tidal hydraulics, tidal mixing and salt intrusion.The shape of an alluvial estuary is characterised by exponentially varying width and the absence of bottom slope.
eBook
Geochemical tracers in submarine groundwater discharge research: practice and challenges from a view of climate changes
Submarine groundwater discharge (SGD), the flux of porewater from permeable seabed or karst conduits to surface water bodies delivers a significant quantity of land-borne solutes to coastal oceans. This input of land-derived solutes is frequently linked with eutrophication, harmful algae blooms and benthic hypoxia, and hence has the potential to trigger great economic losses. Geophysical and geochemical tracers, including salinity, temperature, water stable isotopes and radioactive elements, have been widely applied in SGD studies for more than 50 years in order to, amongst others, identify water sources, estimate residence times and quantify discharge rates. Here we review advantages and shortcomings of these tracers in the study of SGD. Application requirements are outlined based on previous research and combined tracer approaches in karst environments, permeable coasts and estuaries are illustrated under the view of climate changes. Current challenges with the use of geochemical tracers in SGD studies are highlighted and opportunities to develop these tracers for improved coastal management showcased.
Journal Article
Biogeochemical Dynamics at Major River-Coastal Interfaces
This volume provides a state-of-the-art summary of biogeochemical dynamics at major river-coastal interfaces for advanced students and researchers. River systems play an important role (via the carbon cycle) in the natural self-regulation of Earth's surface conditions by serving as a major sink for anthropogenic CO2. Approximately 90 percent of global carbon burial occurs in ocean margins, with the majority of this thought to be buried in large delta-front estuaries (LDEs). This book provides information on how humans have altered carbon cycling, sediment dynamics, CO2 budgets, wetland dynamics, and nutrients and trace element cycling at the land-margin interface. Many of the globally important LDEs are discussed across a range of latitudes, elevation and climate in the drainage basin, coastal oceanographic setting, and nature and degree of human alteration. It is this breadth of examination that provides the reader with a comprehensive understanding of the overarching controls on major river biogeochemistry.
eBook
Ecology and Conservation of Estuarine Ecosystems
St Lucia is the world's oldest protected estuary and Africa's largest estuarine system. It is also the centerpiece of South Africa's first UNESCO World Heritage Site, the iSimangaliso Wetland Park, and has been a Ramsar Wetland of International Importance since 1986. Knowledge of its biodiversity, geological origins, hydrology, hydrodynamics and the long history of management is unique in the world. However, the impact of global change has culminated in unprecedented challenges for the conservation and management of the St Lucia system, leading to the recent initiation of a project in support of its rehabilitation and long-term sustainability. This timely volume provides a unique source of information on the functioning and management of the estuary for researchers, students and environmental managers. The insights and experiences described build on over 60 years of study and management at the site and will serve as a valuable model for similar estuaries around the world.
eBook
Understanding the Long-Term Evolution of the Coupled Natural-Human Coastal System
The U.S. Gulf Coast provides a valuable setting to study deeply connected natural and human interactions and feedbacks that have led to a complex, interconnected coastal system. The physical landscape in the region has changed significantly due to broad-scale, long-term processes such as coastal subsidence and river sediment deposition as well as short-term episodic events such as hurricanes. Modifications from human activities, including building levees and canals and constructing buildings and roads, have left their own imprint on the natural landscape. This coupled natural-human coastal system and the individual aspects within it (physical, ecological, and human) are under increased pressure from accelerating environmental stressors such as sea level rise, intensifying hurricanes, and continued population increase with its accompanying coastal development. Promoting the resilience and maintaining the habitability of the Gulf Coast into the future will need improved understanding of the coupled natural-human coastal system, as well as effective sharing of this understanding in support of decision-making and policies.
Understanding the Long-term Evolution of the Coupled Natural-Human Coastal System presents a research agenda meant to enable a better understanding of the multiple and interconnected factors that influence long-term processes along the Gulf Coast. This report identifies scientific and technical gaps in understanding the interactions and feedbacks between human and natural processes, defines essential components of a research and development program in response to the identified gaps, and develops priorities for critical areas of research.
eBook