This book centers on the history of polders and investigates the complex hydro-social relationships of the Jianghan Plain in late imperial China. Once a hydraulic frontier where local communities managed the polders, the Jianghan Plain had become a state-led hydro-electric powerhouse by the mid-twentieth century. Through in-depth historical analysis, this book shows how water politics, cultural practice, and ecology interplayed and transformed the landscape and waterscape of the plain from a long-term perspective. By touching on topics such as religious practice, ethnic tensions and local militarization, the author reveals a plain forever caught between land and water, and nature and culture.