Designing Rainwater Harvesting Systems

Water conservation is one of the most effective sustainable design practices, yet few professionals know how to collect and use rainwater effectively. Rainwater Harvesting the first comprehensive book on designing rainwater harvesting systems. It provides practical guidelines for developing a rainwater harvesting strategy, taking into account climate, public policies, environmental impact, and end uses. Case studies are included throughout. Rainwater Harvesting is a valuable reference for architects, landscape architects, and site engineers.

Design a rainwater harvesting system for any home in any climate. Water is a crucial resource increasingly under stress. Yet rainfall, even in arid climates, can make up a sizable portion of any home, acreage, or farm's water requirements if harvested and utilized with care. The key is appropriate planning and high-quality site- and climate-specific design. Essential Rainwater Harvesting is a comprehensive manual for designing, building, and maintaining water harvesting systems for the warm and cold climates of the world. Presenting design considerations and approaches for the most common household rainwater supply scenarios – primary, supplemental, and off-grid supply – this step-by-step approach covers: Considerations for full-property water security Demand planning and conservation strategies Supply calculations and design implications for extreme rainfall and drought Materials selection and water quality System and site assessment Sizing and design of gutters, conveyance, tanks, and pumps Pre-filtration, filtration, and disinfection options System maintenance and upkeep This practical resource provides DIYers, trades, and rainwater practitioners with the essential tools, methods, and technical know-how to design, build, and maintain rainwater harvesting systems anywhere. Rob Avis, P.Eng and Michelle Avis, P.Eng own and operate Adaptive Habitat, a leading edge property design firm for resilient homes, acreages, and farms and Verge Permaculture, a globally recognized award-winning education business. They have over 20 years of combined experience in project management, ecological design, and sustainable technologies, which they share at vergepermaculture.ca from their suburban house and yard that they've transformed into a model of cold climate urban permaculture in Calgary, Alberta.

There is no more fundamental substance to life on earth than water. Three quarter of the Earth’s surface is covered by either saltwater or freshwater, yet millions face a daily struggle to access enough water for survival. The effects of ongoing climate change have expanded the water crisis to areas previously considered water secure. This book addresses the role rainwater harvesting (rwh) can play in developing a resilient water infrastructure that will prove adaptive to climate change. The book features three sections. The first section presents the concepts underpinning a new approach to water infrastructure. The term “the worth of water” was developed to reflect the importance of the social life of water. This encompasses all human relationships with water including the social, cultural, hydrological, political, economic, technical and spiritual. A technology portfolio showcasing the worth of water from the Qanats of the ancient world to the modern Rain Cities is presented. Other concepts discussed include the circular economy of water and the concept of multiple waters for multiple users of multiple qualities. Water and its properties are a function of its peculiar molecular structure and this is illustrated in the book. Rainwater harvesting is considered by the authors as containing an inherent treatment train which functions as a complex water treatment system providing physical, chemical and biological removal mechanisms. Part two presents a new design methodology together with design templates and worked examples for the hydraulic and economic analysis of rwh systems. A state-of-the-art literature review of the potential health implications of utilizing rwh is also presented. The final section of the book discusses how rwh can play a vital role in contributing to achieving the Sustainable Development Goals and to living within the Planetary Boundaries.

“You owe it to your family to follow the prescriptions in this book and be prepared for droughts and shortages through rainwater harvesting.” —Jerry Yudelson, author of Dry Run: Preventing the Next Urban Water Crisis Water is a crucial resource increasingly under stress. Yet rainfall, even in arid climates, can make up a sizable portion of any home, acreage, or farm’s water requirements if harvested and utilized with care. The key is appropriate planning and high-quality site- and climate-specific design. Essential Rainwater Harvesting is a comprehensive manual for designing, building, and maintaining water harvesting systems for the warm and cold climates of the world. Presenting design considerations and approaches for the most common household rainwater supply scenarios—primary, supplemental, and off-grid supply—this step-by-step approach covers: Considerations for full-property water security Demand planning and conservation strategies Supply calculations and design implications for extreme rainfall and drought Materials selection and water quality System and site assessment Sizing and design of gutters, conveyance, tanks, and pumps Pre-filtration, filtration, and disinfection options System maintenance and upkeep This practical resource provides DIYers, trades, and rainwater practitioners with the essential tools, methods, and technical know-how to design, build, and maintain rainwater harvesting systems anywhere. “Go to it! Become a rainwater harvester! Embrace your downpipes and filtration systems! And all the while with this brilliant book stuffed into your back pocket.” —Rob Hopkins, founder of the Transition movement “Inspired to save your own rainwater for garden and home? Essential Rainwater Harvesting is bursting with personal, practical, and precise information to get gardeners saving water right now.” —Donna Balzer, author of No Guff Vegetable Gardening

A guide to alternate water collection for green new developments, aimed at conserving water and reusing it wisely. In an era of dwindling resources, water is poised to become the new oil as the entire world now faces the reality of a decreasing supply of clean water. To avert a devastating shortage, we must not only look at alternate water sources for existing structures, we must also plan our new developments differently. Design for Water is an accessible and clearly written guide to alternate water collection, with a focus on rainwater harvesting in the urban environment. The book: outlines the process of water collection from multiple sources—landscape, residential, commercial, industrial, school, park and municipal systems provides numerous case studies details the assembly and actual application of equipment includes specific details, schematics and references All aspects of rainwater harvesting are outlined, including passive and active system set-up, storage, stormwater reuse, distribution, purification, analysis and filtration. There is even a section on rainwater harvesting for wildlife. In addition to rainwater, there are several affordable and accessible alternate sources, including cooling tower bleed-off water, air conditioning condensate, gray water, and fog collection. Design for Water is geared to providing those making development decisions and guidelines with the information they need to set up passive harvesting techniques. The book will especially appeal to engineers, landscape architects, municipal decision-makers, developers and land-owners.

Water harvesting is gaining more and more recognition as the sustainable and resilient alternative to other water supply options. It is economically viable, socially compatible and environmentally friendly. Water harvesting has proven to be a robust solution to overcome or reduce water shortages all over the world. To apply this in a sustainable and effective way, it is important to understand exactly where it can be applied to make full use of its potential. The Handbook of Water Harvesting and Conservation: Case Studies and Application Examples is the most comprehensive, up-to-date and applied casebook on water harvesting and conservation yet published. The editors bring together the many perspectives into a synthesis that is both academically-based and practical in its potential applications. The Handbook of Water Harvesting and Conservation: Case Studies and Application Examples will be an important tool for education, research and technical works in the soil, water and watershed management area, and will be highly useful for drought strategy planning, flood management and adaptation to climate change in all urban, agricultural, forest, rangeland areas.

Rainwater Catchment Systems for Domestic Supply provides a state-of-the-art review of practice in the collection of rainwater. It presents case studies with numerous examples from around the world which will help anyone intending to design or construct a rainwater catchment system. The prime focus of the book is on implementation of roof and ground catchment systems for meeting either total or supplementary household water requirements. All aspects of design and construction are covered including simple methods of sizing systems, erection of gutters, choice of materials, construction techniques, training, operation and maintenance. In addition, non-technical factors such as water quality, health, social, cultural, political, institutional and gender issues are discussed. The text is fully supported with drawings and photographs and a detailed illustrated step-by-step account is provided of how to build several different types of household rainwater tanks with volumes from 2 to 90 cubic metres. Rainwater Catchment Systems is based on practical experience and lessons learnt during over 20 years constructing and researching rainwater systems in Africa and Asia. It will be of use and interest to project managers, development workers, water engineers, architects, builders, researchers and appropriate technology enthusiasts.