Flooding problem in the Thai Nguyen city was held for many years, despite improvement projects, upgrading the drainage system but the problem has not been solved. In particular, the drainage system were unsanitary, the flow cross-sectional area has been narrowing, thus it has not ensured the drainage compared with actual demand. The article learned, studied the drainage situation downtown in Thai Nguyen city
the cause, flooding in the center. Since authors suggest some solutions to overcome inundation to ensure conditions people's lives as well as the urban landscape.