闽江水口水电站水情站网与预报若干技术问题

Several technical problems of hydrological station network and forecasting for the Shuikou Hydropower Station in the Minjiang River

以我国东南沿海的闽江水口水电站为例 ,研究了河道水情站网布局及其预报方法的理论应用问题后认为 :河道水情站网合理布局应以增设水情专用站为主 ,并建立相应的水位流量关系 ,这是提高水情预报精度的关键 ;而合理布局的技术标准当是河道水情预报方案合格率达到规范要求。采用河道流量演算法和相应水位 (流量 )法 ,对闽江干流 2 8次洪水进行同步验证 ,前者洪峰水位预报误差均小于± 0 2 0m ;比后者精度高许多。此外 ,河道流量演算法可论证高水预报参数外延使用的可行性。

The theory and application of water regime station network distribution and forecasting methods have been studied, taking the Shuikou Hydropower Station in Minjiang River in the southeast coastal area of China as an example It is considered that the rational distribution of water regime stations in river should adopt more special stations of water regime as main and then set up the corresponding discharge level relationship, which is the key to enhance the forecast accuracy of water regime The technical standard of rational distribution of water regime stations is to meet the requirements of codes The discharge routing calculation method and corresponding level (discharge) method were adopted in the calculation of the Shuikou Hydropower Station 28 floods in the main stream of the Minjiang River have been verified by two such methods The results showed that using the former method, the forecasting error of flood peak level is less than±0 20 m, which is more accurate than that by using the later method