Model estimates of China's terrestrial water storage variation due to reservoir operation

Understanding the role of reservoirs in the terrestrial water cycle is critical to support the sustainable management of water resources especially for China where reservoirs have been extensively built nationwide. However, this has been a scientific challenge due to the limited availability of continuous, long-term reservoir operation records at large scales, and a process-based modeling tool to accurately depict reservoirs as part of the terrestrial water cycle is still lacking. Here, we develop a continental-scale land surface-hydrologic model over the mainland China by explicitly representing 3,547 reservoirs in the model with a calibration-free conceptual operation scheme for ungauged reservoirs and a hydrodynamically based two-way coupled scheme. The model is spatially calibrated and then extensively validated against streamflow observations, reservoir storage observations and GRACE-based terrestrial water storage anomalies. A 30-year simulation is then performed to quantify the seasonal dynamics of China’s reservoir water storage (RWS) and its role in China\u27s terrestrial water storage (TWS) over recent decades. We estimate that, over a seasonal cycle, China\u27s RWS variation is 15%, 16%, and 25% of TWS variation during 1981–1990, 1991–2000, and 2001–2010, respectively, and one-fifth of China’s reservoir capacity are effectively used annually. In most regions, reservoirs play a growing role in modulating the water cycle over time. Despite that, an estimated 80 million people have faced increasing water resources challenges in the past decades due to the significantly weakened reservoir regulation of the water cycle. Our approaches and findings could help the government better address the water security challenges under environmental changes

Reservoir delineation and cumulative impacts assessment in large river basins: A case study of the Yangtze River Basin

Ph.DDOCTOR OF PHILOSOPH

The Politics of Water Resource Management: State-Guided Framing of China’s South to North Water Diversion Project and its Impact on Citizen Perception

Due to China’s geographic and human-exacerbated water scarcity, government leaders have turned to the South to North Water Diversion Project (SNWDP) in order to ensure a reliable source of water for the country’s increasingly parched Northern cities and townships. This thesis examines this inter-basin water transfer project (soon to be the world’s largest) through the lens of how government actors have framed the project. This official framing analysis is presented in tandem with citizen perceptions observed through online commentary in order to evaluate how effective such framing has been. Through such analysis, this research observes a pattern of nationalism and utilitarianism within state framing which is largely echoed in citizen commentary

Values of inland fisheries in the Mekong river basin

This report provides an overview of the biological, economical, social and cultural values of river fisheries in the Lower Mekong Basin (Yunan, Laos, Thailand, Cambodia and Vietnam). The report also identifies the main impacts of environmental changes on these values.Inland fisheries, Socioeconomic aspects, Economic analysis, Asia, ISEW, Vietnam, Mekong River Delta, Mekong Delta,

Hydrolink 2022/2. Global Water Security

Topic: Global Water Securit