Indicator System on Dike Breach Risk Evaluation for the Lower Reaches of Yellow River
黄河下游悬河决溢风险评价指标体系的构建

The lower Yellow River is characterized as "Hang River". It deposits seriously at all times. It changed its course and breached frequently, and gave rise to great calamity to the Chinese People, especially in Henan and Shandong provinces. The risk of dike breach in the lower Yellow River, which is developing now, is a serious threat to people's life and property safety in the central China always, so it is of great significance to establish the indicator system to evaluate the risk of dike breach.By analyzing the environmental characteristics in the lower reach of Yellow River, especially its geology structure, the importance of flood factors and the mechanism of different dike breach pattern , a systematic evaluation indicator system of dike breach risk in the lower Yellow River is established.Some viewpoints on dike breach risk evaluation are put forward in this paper: 1. Putting the factors of flood condition into the risk evaluation indicator system. 2. The breach risk evaluation indicator system includes two parts, namely, environmental background evaluation of geology structure and scenario evaluation of dike breach. 3. The scenario evaluation of dike breach links up with the pattern of dike breach. It is very important to prevent and control flood. 4. The dike breach evaluation factors and indicators is selected and decided according to the mechanism of dike breach pattern.