长江实时洪水预报系统

flow, the ponents can be distinguished as: Р1. Metrological forecasting: providing Quantitative Precipitation Forecast (QPF) using meteorological models;Р2. Hydrological modeling: using real time rainfall and QPF to predict runoff. Models used are mainly Antecedent Precipitation Index (API) method [1] using Unit Hydrograph (UH) [2] routing, and the Xinanjiang (XAJ) model [3]; Р3. Flood routing: using runoff from model estimations and actual measurements as the boundary conditions, the flood routing procedures calculate water level and discharge at different stations using various hydraulic and statistic models; Models are Muskingum method [4], MIKE11 developed by DHI Water & Environment (/), co-relationship curves, and the so-plex “big lake routing” at Dongting lake developed by BOH CWRC;