This book provides a glimpse into the cutting-edge research on pollution management and detection in the water environments of watersheds, covering topics like water pollution traceability, pollution monitoring, and management techniques. According to the United Nations World Water Development Report provided by the World Water Forum, millions of tons of garbage are dumped into rivers, lakes, and streams around the world every day, and every liter of wastewater pollutes eight liters of freshwater, causing a serious damage to the water environment in watersheds. The protection and prevention of water in watersheds, which is related to freshwater resources for human development and survival, has always been a crucial research direction in the field of environmental engineering. This book aims to promote the exchange of scientific information among scholars from the world's leading universities, research centers, and high-tech companies and is of great benefit to researchers and professionals in the field of environmental control of watershed management.