Abusive use of Upper Stream River was demonstrated by China in years - when the downstream residents in Thailand suffered from water shortage to flooding --  China controlled the dam water in upper stream, and downstream people had no say in how water is sustained for everyday use.

China is stealthily waging a water war

https://www.theglobeandmail.com/opinion/china-is-stealthily-waging-a-water-war/article37583969/

By building cascades of large dams on international rivers just before they leave its territory, China is re-engineering cross-border natural flows. Among the rivers it has targeted are the Mekong, the lifeline of Southeast Asia, and the Brahmaputra, the lifeblood for Bangladesh and northeastern India.

China has gone into overdrive to appropriate natural resources. On the most essential resource, freshwater, it is seeking to become the upstream controller by manipulating transboundary flows through dams and other structures.