... system.43. Bui Nam Sach, Water resources planning for the key North economic region, Water Resources Journal – Viet Nam Water Resources Associaiton, series 1 - 2006, page 19- 22.4. Bui Nam Sach, ... regulation reservoirs:11The Thesis is done at the Water Resources UniversitySupervisors:1. Assoc. Prof. Dr. Le Quang Vinh2. Assoc. Prof. Dr. Pham Viet HoaCritic 1: . . . . . . . . . . . ... Quang Vinh, Bui Nam Sach, Some issues on water-logging in the Red River Delta, Intramural magazine of the Water Resources University, November 2000, page 60-64.2. Le Quang Vinh, Bui Nam Sach, Study,...