Abstract

In this paper, the main framework of the Digital Yangtze River Basin Flood Forecast System (DYRBFFS) with long forecast period and high forecast precision has been proposed, which aims at many key problems on the Yangtze River, such as water resources forecast and distribution, flood disaster analysis and evaluation, and flood forecast etc. DYRBFFS considers synthetically characteristics of the Yangtze River Basin, including upstream vegetation, river network, hydraulic and hydropower projects and the South-to-North Water Transfer Project, and at the same time DYRBFFS utilizes hydrodynamics, riverbed evolution forecast method, hydrology real-time updating method, real-time adjustment method of complex boundary condition and numerical visualization. Basic results show that DYRBFFS based on this main framework, which has longer forecast period, higher forecast precision and excellent abilities of solving problem, can give an exact and timely flood forecast and provide scientific gist and technological guarantee for flood control on the Yangtze River.

Keywords: Flood forecast, Digital Yangtze River Basin, Forecast period, Forecast precision