Water differentiates planet earth from all the other planets in the solar system. At the same time, as the global supply of freshwater is beyond enough to meet all contemporary and foreseeable water needs, its spatial and temporal allocations are not. There are numerous areas in which freshwater resources remain inadequate to fulfil domestic, socioeconomic growth and environmental needs. In such areas, the lack of clean water to satisfy human consumption and sanitation needs is indeed a limitation on human health and productivity, and for this reason on economic growth as well as on the upkeep of a clean environment and holistic ecosystems. This book mentions that researchers must discover ways to take away these constraints. There are a couple of demanding situations in doing that, in particular given an unstable and unsure future climate, plus a rapidly developing population that is driving expanded socioeconomic improvement, globalization, and urbanization. How best to fulfil these needs requires research in various areas of water management. This book identifies the problems facing water managers today, and the research required to better inform individuals who attempt to develop a more sustainable and suitable future.