This book contains both practical and theoretical aspects of groundwater resources relating to geochemistry. Focusing on recent research in groundwater resources, this book helps readers to understand the hydrogeochemistry of groundwater resources. Dealing primarily with the sources of ions in groundwater, the book describes geogenic and anthropogenic input of ions into water. Different organic, inorganic and emerging contamination and salinity problems are described, along with pollution-related issues affecting groundwater. New trends in groundwater contamination remediation measures are included, which will be particularly useful to researchers working in the field of water conservation. The book also contains diverse groundwater modelling examples, enabling a better understanding of water-related issues and their management. Groundwater Geochemistry: Pollution and Remediation offers the reader: An understanding of the quantitative and qualitative challenges of groundwater resources An introduction to the environmental geochemistry of groundwater resources A survey of groundwater pollution-related issues Recent trends in groundwater conservation and remediation Mathematical and statistical modeling related to groundwater resources Students, lecturers and researchers working in the fields of hydrogeochemistry, water pollution and groundwater will find Groundwater Geochemistry an essential companion.

This book summarizes the achievements and experience of the Yangtze River rehabilitation and protection, analyzes the new situation and requirements of the Yangtze River rehabilitation and protection, and discusses the main issues and their solution alternatives for the Yangtze River rehabilitation and protection efforts. The Yangtze River, respected as the mother river of the Chinese nation, contributes immensely toward the socioeconomic development of China and braces up the national strategies such as the development of the Yangtze River Economic Belt and the integrated development of the Yangtze River Delta, etc. Whether the Yangtze River is under good stewardship has implications on not only the wellbeing of more than 400 million inhabitants in the basin, but also in broader sense the overall sustainability of socioeconomic development of the whole country. This book which has two parts, provides a multidirectional analysis of Yangtze River rehabilitation and protection. The first part explores the stages, achievements, and the future of the Yangtze rehabilitation and protection. Major issues existing in Yangtze River Basin rehabilitation and protection are discussed in the second part. Many pictures, charts, and diagrams are involved providing an understanding of the situation of Yangtze River Basin.

This journal-like book series includes edited volumes to rapidly report and spread the latest technological results, new scientific discovery and valuable applied researches in the fields concerning offshore robotics as well as promote international academic exchange. We aim to make it one of the premier comprehensive academic publications of world offshore vehicle and robotics community. The audience of the series will include the scholars, researchers, engineers and students who are interested in fields of autonomous marine vehicles and robotics, including autonomous surface vehicles, autonomous underwater vehicles, remote operation vehicles, marine bionics, marine vehicle modeling, guidance, navigation, control and cooperation and so on.

Packed with surprising and fascinating information, London's Lost Rivers uncovers a very different side to London - showing how waterways shaped our principal city and exploring the legacy they leave today. With individual maps to show the course of each river and over 100 colour photographs, it's essential browsing for any Londoner and the perfect gift for anyone who loves exploring the past... 'An amazing book' -- BBC Radio London 'Talling's highly visual, fact-packed, waffle-free account is the freshest take we've yet seen. A must-buy for anyone who enjoys the "hidden" side of London -- Londonist 'A fascinating and stylish guide to exploring the capital's forgotten brooks, waterways, canals and ditches ... it's a terrific book' - Walk 'Pocket-sized, beautifully designed, illustrated and informative - in short a joy to read, handle and use' -- ***** Reader review 'Delightful, informative and beautifully produced' -- ***** Reader review 'A small gem. A really great book. I can't put it down' -- ***** Reader review 'Fascinating from start to finish' -- ***** Reader review ************************************************************************************************ From the sources of the Fleet in Hampstead's ponds to the mouth of the Effra in Vauxhall, via the meander of the Westbourne through 'Knight's Bridge' and the Tyburn's curve along Marylebone Lane, London's Lost Rivers unearths the hidden waterways that flow beneath the streets of the capital. Paul Talling investigates how these rivers shaped the city - forming borough boundaries and transport networks, fashionable spas and stagnant slums - and how they all eventually gave way to railways, roads and sewers. Armed with his camera, he traces their routes and reveals their often overlooked remains: riverside pubs on the Old Kent Road, healing wells in King's Cross, 'stink pipes' in Hammersmith and gurgling gutters on streets across the city. Packed with maps and over 100 colour photographs, London's Lost Rivers uncovers the watery history of the city's most famous sights, bringing to life the very different London that lies beneath our feet.

From Lake Coeur d'Alene to its confluence with the Columbia, the Spokane River travels 111 miles of varied and often spectacular terrain-rural, urban, in places wild. The river has been a trading and gathering place for Indigenous peoples for thousands of years. With bountiful trout, accessible swimming holes, and challenging rapids, it is a recreational magnet for residents and tourists alike. The Spokane also bears the legacy of industrial growth and remains caught amid interests competing over natural resources. The contributors to this collection profile this living river through personal reflection, history, science, and poetry. They bring a keen environmental awareness of resource scarcity, climate change, and cultural survival tied to the river's fate.

A colorful look at a forgotten era of Florida tourism. Filled with rare photographs, vintage postcards and advertisements, and fascinating writing from over 100 years ago, Florida's Healing Waters spotlights a little-known time in Florida history when tourists poured into the state in search of good health. Rick Kilby explores the Victorian belief that water caused healing and rehabilitation, tracing the history of "taking the waters" from its origins in the era of Enlightenment. Nineteenth-century Americans traveled from afar to bathe in the outdoors and soak up the warm climate of Florida. Here, with more than 1,000 freshwater springs, 1,300 miles of coastline, and 30,000 lakes, water was an abundant resource. Through the wealth of images in this book, Kilby shows how Florida's natural wonders were promoted and developed as restorative destinations for America's emerging upper class. The rapid growth in tourism infrastructure that began during the Gilded Age lasted well into the twentieth century, and Kilby explains how these now-lost resorts helped boost the economy of modern Florida. Today, these splendid health spas and elaborate bathing facilities have been lost, replaced by recreational amenities for a culture more about sun and fun than physical renewal. In this book, Kilby emphasizes the value of honoring and preserving the natural features of the state in the face of continual development. He reminds us that Florida's water is still a life-giving treasure.

This all-new revised edition of a modern classic is the most comprehensive and up-to-date coverage of the "green" process of desalination in industrial and municipal applications, covering all of the processes and equipment necessary to design, operate, and troubleshoot desalination systems. This is becoming increasingly more important for not only our world's industries, but our world's populations, as pure water becomes more and more scarce. "Blue is the new green." This is an all-new revised edition of a modern classic on one of the most important subjects in engineering: Water. Featuring a total revision of the initial volume, this is the most comprehensive and up-to-date coverage of the process of desalination in industrial and municipal applications, a technology that is becoming increasingly more important as more and more companies choose to "go green." This book covers all of the processes and equipment necessary to design, operate, and troubleshoot desalination systems, from the fundamental principles of desalination technology and membranes to the much more advanced engineering principles necessary for designing a desalination system. Earlier chapters cover the basic principles, the economics of desalination, basic terms and definitions, and essential equipment. The book then goes into the thermal processes involved in desalination, such as various methods of evaporation, distillation, recompression, and multistage flash. Following that is an exhaustive discussion of the membrane processes involved in desalination, such as reverse osmosis, forward osmosis, and electrodialysis. Finally, the book concludes with a chapter on the future of these technologies and their place in industry and how they can be of use to society. This book is a must-have for anyone working in water, for engineers, technicians, scientists working in research and development, and operators. It is also useful as a textbook for graduate classes studying industrial water applications.

The Chalk is the most important source of fresh water in Northwestern Europe; more than eight million cubic meters of water are pumped daily from the aquifer. This book reviews the origin, sedimentology, and hydraulic properties of this unique rock, as well as the chemical characteristics of the water it contains. Separate chapters cover the occurrence of groundwater in the Chalk in each of the six countries which share its resources. The factors influencing the flow of oil through the Chalk and its role as a hydrocarbon reservoir in the North Sea are treated in detail. The industrial chemicals, fertilizers, and pesticides that have been allowed to enter the Chalk, thereby threatening its use for water supply are also discussed, with an emphasis on the factors that influence the distribution of the aquifer pollutants. This book will be of interest to a wide range of professionals and students, including those in geology, hydrogeology, water engineering, civil engineering, geography, water administration, and environmental science.

In this book, the author focuses on the physics behind dew, breaths figures, and dropwise condensation phenomena to introduce scientists, engineers and students to the many original processes involved in condensation. Consisting of 15 Chapters, 18 Appendices and over 500 references, the reader learns the needed theoretical backgrounds and formulae to understand the complexity of dropwise condensation. Heat and mass transfer, nucleation and growth on various substrates are considered (solid, liquid, plastic, undergoing phase change or micro-patterned substrates). The particular role of thermal or geometrical discontinuities where growth can be enhanced or reduced, dynamical aspects of self-diffusion, problems related to drop collection by gravity and the optics of dropwise condensation are all discussed. Although the content mainly deals with condensation from humid air, it can readily be generalized to condensation of any substance. The specificities of pure vapor condensation (e.g. steam) are also examined. Numerous images are provided within the text to illustrate the physics. This book is meant for those studying or researching dew and dropwise condensation, but also for individuals wishing to develop their knowledge on the subject.

In the last 25 years, information systems have had a disruptive effect on society and business. Up until recently though, the majority of passengers and goods were transported by sea in many ways similar to the way they were at the turn of the previous century. Gradually, advanced information technologies are being introduced, in an attempt to make shipping safer, greener, more efficient, and transparent. The emerging field of Maritime Informatics studies the application of information technology and information systems to maritime transportation. Maritime Informatics can be considered as both a field of study and domain of application. As an application domain, it is the outlet of innovations originating from data science and artificial intelligence; as a field of study, it is positioned between computer science and marine engineering. This new field's complexity lies within this duality because it is faced with disciplinary barriers yet demands a systemic, transdisciplinary approach. At present, there is a growing body of knowledge that remains undocumented in a single source or textbook designed to assist students and practitioners. This highly useful textbook/reference starts by introducing required knowledge, algorithmic approaches, and technical details, before presenting real-world applications. The aim is to present interested audiences with an overview of the main technological innovations having a disruptive effect on the maritime industry, as well as to discuss principal ideas, methods of operation and applications, and future developments. The material in this unique volume provides requisite core knowledge for undergraduate or postgraduate students, employing an analytical approach with numerous real-world examples and case studies.

HYDROGEOLOGY Hydrogeology: Principles and Practice provides a comprehensive introduction to the study of hydrogeology to enable the reader to appreciate the significance of groundwater in meeting current and future environmental and sustainable water resource challenges. This new edition has been thoroughly updated to reflect advances in the field since 2014 and includes over 350 new references. The book presents a systematic approach to understanding groundwater starting with new insights into the distribution of groundwater in the Earth's upper continental crust and the role of groundwater as an agent of global material and elemental fluxes. Following chapters explain the fundamental physical and chemical principles of hydrogeology, and later chapters feature groundwater field investigation techniques in the context of catchment processes, as well as chapters on groundwater quality and contaminant hydrogeology, including a section on emerging contamination from microplastic pollution. Unique features of the book are chapters on the application of environmental isotopes and noble gases in the interpretation of aquifer evolution, and a discussion of regional characteristics such as topography, compaction and variable fluid density on geological processes affecting past, present and future groundwater flow regimes. The last chapter discusses future challenges for groundwater governance and management for the long-term sustainability of groundwater resources, including the role of managed aquifer recharge, and examines the linkages between groundwater and climate change, including impacts on cold-region hydrogeology. Given the drive to net-zero carbon emissions by 2050, the interaction of groundwater in the exploitation of energy resources, including renewable resources and shale gas, is reviewed. Throughout the text, boxes and a set of colour plates drawn from the authors' teaching and research experience are used to explain special topics and to illustrate international case studies ranging from transboundary aquifers and submarine groundwater discharge to the hydrogeochemical factors that have influenced the history of malting and brewing in Europe. The appendices provide conversion tables and useful reference material, and include review questions and exercises, with answers, to help develop the reader's knowledge and problem-solving skills in hydrogeology. This highly informative and accessible textbook is essential reading for undergraduate and graduate students primarily in earth sciences, environmental sciences and physical geography with an interest in hydrogeology or groundwater topics. The book will also find use among practitioners in hydrogeology, soil science, civil engineering and landscape planning who are involved in environmental and resource protection issues requiring an understanding of groundwater.

The benthic boundary layer is of considerable interest to geochemists, sedimentologists, biologists, and engineers. This book of original chapters edited by leading reseachers in the field provides an ideal reference on measurments, techniques, and models for transport and biochemical processes in the benthic boundary layer. Each chapter provides a comprehensive review of a selected field, with illustrated examples from the authors own work.

This accessible new textbook provides a thorough introduction to all aspects of groundwater systems and their management. Using straightforward language and analogies to everyday experiences, it explains the origins, nature, and behavior of subsurface water without resorting to complicated mathematics.

"Groundwater in the Environment" draws on case studies and cutting-edge research from around the world, giving a unique insight into groundwater occurring in a wide range of different climate zones and geological settings. This book:
provides a robust, practical introduction to groundwater quality, and a succinct summary of modern remedial technologies for polluted groundwaters
explores how groundwater fits into the wider natural environment, especially in relation to freshwater ecosystems
considers the vulnerability of groundwater systems and the effects of pollution, climate change, land-use change, and overexploitation
examines human dependence on water and the effect that this has on groundwater systems
presents vivid examples of geohazards associated with ground waters
explains the whys and wherefores of groundwater modeling
examines competing philosophies of groundwater management, making the case for approaches which take social, economic and ecological issues into account.

"Goundwater in the Environment" provides an up-to-date, essential introduction for undergraduate students of environmental sciences, geography and geology. It will also be invaluable to professionals working in various fields of natural resource management who need accessible information on groundwater but who are reluctant to read conventional texts full of mathematical notation. For practicing hydrogeologists and engineers without formal training in freshwater ecology, this book provides a crash course' in the new frontiers of groundwater management.

Artwork from the book is available to instructors online at www.blackwellpublishing.com/younger. An Instructor manual CD-ROM for this title is available. Please contact our Higher Education team at [email protected] for more information.

One quarter of the world's population lives in karst terrains, yet karsts are highly vulnerable to stresses caused by human activity. This book surveys human impact on karst water, showing that the increasing pollution of the environment has, to a great extent, spoiled sensitive karst ecosystems. This text examines such consequences and offers proposals for future solutions and strategies. Part One provides an overview of the functioning of karsts and of human interaction with karst environments over several millennia. Part Two consists of a systematic examination of the major areas of human activity affecting karst waters, such as agriculture, industry, mining and water exploitation. Finally, Part Three views the effects on karst groundwater within a broader societal and legislative perspective and considers possible changes of methodology and approach.

This book provides an in-depth review of heavy metals in corals, describing the sources of heavy metals in the marine environment and their effect on corals. It is designed to serve as a unique reference for upcoming marine researchers and chemists, advanced undergraduate and postgraduate students as well as those interested in marine pollution with respect to heavy metals. The book explains the basics as well as the state-of-the-art regarding heavy metals and corals and is engaging and clearly written and narrated, providing readers with the fundamental tools about the subject matter that they need in their specific fields. It allows readers to understand and appreciate the interactions between the atmosphere, ocean, and the geosphere. Detailed reference is included for the benefit of the reader. The specific objectives of this book are (i) to inform/educate the reader about persistent pollutants such as heavy metals, (ii) to identify sources of heavy metals in the marine environment, (iii) to inform about route of exposure and uptake of the heavy metal pollutants by corals, (iv) to elaborate about the effect of heavy metal pollutants on the coral reef ecosystems, (v) to discuss the ways in which heavy metal regulation occurs in corals, (vi) to impact current knowledge regarding heavy metals in the marine environment, and (vii) to briefly show chemical analysis and instrumentation for analyzing heavy metals.

Rivers and the ecosystems they support have always captivated humans, leading curious scientists to broaden our understanding with ongoing research. In Explorer's Guide to Rivers and Streams, Dr. Ryan Utz (Chatham University) presents a broad scientific understanding of rivers, streams, and the animals that reside within them, written accessibly for a general audience. Topics range from what causes river flows to rise and fall to the ecology of riverine fishes. Kayakers, anglers, and hikers alike will find many tools within Explorer's Guide to Rivers and Streams to deepen their understanding of their favorite waterway.

This book integrates 30 years of mercury research in the Florida Everglades to inform scientists and policy makers. The Everglades is an iconic ecosystem by virtue of its expanse; diversity of biota; and multiple international designations. Despite this, the Everglades has been subjected to multiple threats including: habitat loss, hydrologic alterations, invasive species and altered water quality. Less well recognized as a threat to Everglades human use and wildlife populations is the toxic metal, mercury. The first half of Volume II focuses on biogeochemistry and factors unique to the Everglades that make it extraordinarily susceptible to mercury methylation following its deposition: warm subtropical climate, shallow depth, high levels of dissolved organic matter, sulfate contamination, nutrient enrichment and sediment redox conditions (for review of atmospheric mercury deposition significance, see Vol. I). The second half of Volume II answers the "so what" question - why biomagnification of the methylmercury produced in the Everglades is a threat to the health of top predators including humans. The results of the synthesis presented in Volume II suggest that the mercury problem in the Florida Everglades is one of the worst in the world due to its areal extent and the degree of risk to ecological receptors and humans.

River Restoration River restoration initiatives are now widespread across the world. The research efforts undertaken to support them are increasingly interdisciplinary, focusing on ecological, chemical, physical as well as societal issues. River Restoration: Political, Social, and Economic Perspectives provides a comprehensive overview of research in the field of river restoration in humanities and the social sciences. It illustrates how, in the last thirty years or so, such approaches have evolved and strengthened within the restoration sciences. The scientific community working in this domain has structured itself, often regionally and circumstantially, to critically assess and improve restoration policies and practices. As a research field, river restoration tackles three thematic axes: Human-river interactions - especially perceptions and practices of rivers, and how these interactions can be changed by restoration projects Political processes, with a particular interest in governance and decision-making, and a specific emphasis on the question of public participation in restoration projects Evaluation of the social and economic benefits of river restoration River Restoration: Political, Social, and Economic Perspectives encompasses these three topics, and more, to provide the reader with the most up-to-date and holistic view of this constantly evolving area. The book will be of particular interest to human and social scientists, biophysical scientists (hydrologists, geomorphologists, ecologists), environmental scientists, public policy makers, design or planning officers, and anyone working in the field of river restoration.

Several years ago, Debbie Bentley visited the Salton Sea for the first time. The area was an oddity, full of dilapidated houses, rotting fish, and horrible smells. In spite of this, she found the lake itself beautiful, vast, and haunting. Such a dangerous beauty. Even though large amounts of the playa are currently exposed, the Salton Sea is still so large that from some vantage points, the earth's curvature hides the opposite shore. Currently the dust from the playa fills the air and causes health issues and crop damage - more exposed lakebed is certainly a public health crisis in the making. At the end of 2017, California mandated water transfers to the Sea ended. From this point forward, playa exposure will increase at an accelerated rate. This body of work is a portrait of the Salton Sea in 2018. The lake will never be as it was at that moment in time, nor will the remediation efforts woefully behind schedule to deal with the increasing dust.

This book addresses a timely and compelling emerging issue related to the conservation and sustainable use of marine resources and the sustainable development of the coastal community. Marine protected areas (MPAs) make a remarkable contribution to the protection of marine communities by providing sustainable livelihoods, deriving financial benefits from the development of fisheries and tourism, as well as by restoring ocean productivity and preventing further environmental degradation. These areas have been considered the cornerstone of a blue economy due to their substantial economic, social and environmental contributions. However, MPAs around the world are severely hampered by a multitude of issues and challenges such as inefficient management, poor socioeconomic conditions and environmental degradation due to human activities, overexploitation of marine resources, degradation of water quality, massive waste production and climate change. These are the main obstacles to economic, social and environmental sustainability. Hence, a collaborative management approach and an integrated management policy framework is urgently needed for the economic, social, political, cultural, technological, and ecological development of coastal communities.

This volume is of great importance to humans and other living organisms. The study of water quality draws information from a variety of disciplines including chemistry, biology, mathematics, physics, engineering, and resource management. University training in water quality is often limited to specialized courses in engineering, ecology, and fisheries curricula. This book also offers a basic understanding of water quality to professionals who are not formally trained in the subject. The revised third edition updates and expands the discussion, and incorporates additional figures and illustrative problems. Improvements include a new chapter on basic chemistry, a more comprehensive chapter on hydrology, and an updated chapter on regulations and standards. Because it employs only first-year college-level chemistry and very basic physics, the book is well-suited as the foundation for a general introductory course in water quality. It is equally useful as a guide for self-study and an in-depth resource for general readers.

This book focuses on the evaluation of wave energy in the Maritime Silk Road. Firstly, it compares wave energy and other main energy sources, and then discusses the various disadvantages. It also presents the current research and the difficulties of wave energy evaluation, and systematically analyzes the climatic characteristics of the wave energy, including the temporal-spatial distribution and climatic trend of a series of key factors (e.g. wave power density, availability, richness, stability, energy direction, energy storage). It then describes the design of a short-term forecasting scheme and a long-term projection scheme of wave energy suitable for the Maritime Silk Road, to serve as a plan for the daily operation and long-term development of wave energy. Further, it highlights the wave energy analysis and decision-making in the context of the remote islands and reefs, using Sri Lanka is taken as a case study. Lastly, it presents the first wave energy resource dataset for the Maritime Silk Road. This book is one of a series of publications on the 21st century Maritime Silk Road (shortened as "Maritime Silk Road") that covers the characteristics of the marine environment and marine new energy, remote islands and reef construction, climate change, early warning of wave disasters, legal escort, marine environment and energy big data construction, contributing to the safe and efficient construction of the Maritime Silk Road. It aims to improve our knowledge of the ocean, and so improve the capacity for marine construction, enhance the viability of remote islands and reefs, ease the energy crisis and protect the ecological environment and improve the quality of life of residents along the Maritime Silk Road, as well as to protect the rights, and interests of the countries and regions participating in the construction of the Maritime Silk Road. This book is a valuable reference resource for decision-makers, researchers, and marine engineers working in the related fields.

It has often been said that generals prepare for the next war by re-fighting the last. The Deepwater Horizon (DWH) oil spill was unlike any previous - an underwater well blowout 1,500 meters deep. Much has been learned in the wake of DWH and these lessons should in turn be applied to both similar oil spill scenarios and those arising from "frontier" explorations by the marine oil industry. The next deep oil well blowout may be at 3,000 meters or even deeper. This volume summarizes regional (Gulf of Mexico) and global megatrends in marine oil exploration and production. Research in a number of key areas including the behavior of oil and gas under extreme pressure, impacts on biological resources of the deep sea, and the fate of oil and gas released in spills is synthesized. A number of deep oil spills are simulated with detailed computer models, and the likely effects of the spills and potential mitigation measures used to combat them are compared. Recommended changes in policies governing marine oil exploration and development are proposed, as well as additional research to close critical and emerging knowledge gaps. This volume synthesizes state-of-the-art research in deep oil spill behavior and response. It is thus relevant for government and industry oil spill responders, policy formulators and implementers, and academics and students desiring an in-depth and balanced overview of key issues and uncertainties surrounding the quest for deep oil and potential impacts on the environment.

This book, Volume 5, Part B of a five-volume set, addresses the rivers that flow into the Gulf of Mexico (Guadalupe, Sabine, Rio Grande, and Pecos) and includes a discussion of the many issues related to agricultural runoff, pollution, and international water rights.

Groundwater is a vital source of water throughout the world. As the number of groundwater investigations increase, it is important to understand how to develop comprehensive quantified conceptual models and appreciate the basis of analytical solutions or numerical methods of modelling groundwater flow.
Groundwater Hydrology: Conceptual and Computational Models describes advances in both conceptual and numerical modelling. It gives insights into the interpretation of field information, the development of conceptual models, the use of computational models based on analytical and numerical techniques, the assessment of the adequacy of models, and the use of computational models for predictive purposes. It focuses on the study of groundwater flow problems and a thorough analysis of real practical field case studies.
It is divided into three parts:
* Part I deals with the basic principles, including a summary of mathematical descriptions of groundwater flow, recharge estimation using soil moisture balance techniques, and extensive studies of groundwater-surface water interactions.
* Part II focuses on the concepts and methods of analysis for radial flow to boreholes including topics such as large diameter wells, multi-layered aquifer systems, aquitard storage and the prediction of long-term yield.
* Part III examines regional groundwater flow including situations when vertical flows are important or transmissivities change with saturated depth.
Suitable for practising engineers, hydrogeologists, researchers in groundwater and irrigation, mathematical modellers, groundwater scientists, and water resource specialists. Appropriate for upper level undergraduates and MSc students in Departments of Civil Engineering, Environmental Engineering, Earth Science and Physical Geography. It would also be useful for hydrologists, civil engineers, physical geographers, agricultural engineers, consultancy firms involved in water resource projects, and overseas development workers.