This book brings forth both significant challenges in the sphere of water resource management and various approaches to resolving them. From drinking to agriculture, and sanitation to industrial needs, people depend on freshwater reserves for a myriad of activities essential for the smooth and efficient functioning of their daily lives. Hence, understanding the threats and problems pertaining to freshwater resources is critical. There is also a growing need to work towards enhancing the availability of water resources to all. This book is an important tool to address the need for improvements in resources and reduction of threats by giving an assessment of available reviews and case studies that shed light on methods of contamination in the environment. Additionally, it provides details on the sustenance of groundwater and surface-water resources across the globe. This book is meant for students and professionals working in fields which are closely associated with water management and hydrology.