ABSTRACT
This introduction presents an overview of key concepts discussed in the subsequent chapters of this book. The book addresses the intersection of development (both rural and urban), and the supply and quality of water required to sustain it. Sustainable development must include water quantity and quality as indicators applied to both human and ecosystem health. National governments need to urgently mitigate the already occurring impacts of climate change. Even more urgently, one must put adaptation plans into effect to respond to the worsening conditions that he/she can no longer avoid during the next few decades. Some categories of water are particularly precious, such as the pure sources of drinking water. Groundwater sources of drinking water should be protected from contamination by disease-causing organisms or toxic substances. There are three basic types of constructed wetlands; the book discusses their characteristics, uses, construction and performance. It also discusses constructed wetlands for the treatment of polluted river or lake water.
