长江下游干流八里江水文站水位流量关系分析

Study on stage-discharge relationship of Balijiang Hydrometric Station in mainstream of lower reaches of Yangtze River

长江下游干流八里江水文站是鄱阳湖入汇长江后的重要控制站。该站流量测验方式为巡测,且实测资料主要集中在高水时期。为适应今后的流量在线监测要求,需要对该站水位流量关系进行分析。通过合理的试算与分析获取较为连续且可靠的数据,开展了关系定线和各项检验验算。结果表明:单一曲线法可适用于八里江站水位流量关系,且满足现行水文整编规范要求。研究成果可今后流量测次布置、报汛精度及流量在线监测实施提供参考。

Balijiang Hydrometric Station located in the mainstream of the lower reaches of Yangtze River.It is an important controlling station at the downstream of Poyang Lake into Yangtze River.At present,the discharge measurement method is tour gauging,and the measured data are mainly concentrated in the high water period.In order to meet the requirements of on-line monitoring in the future,it is necessary to analyze the water-level discharge relation.The relation was determined and the statistic verification was carried out based on consecutive and reliable data obtained by reasonable trail calculation and analysis.The results showed that the single curve method can be applied to stage-discharge relation of Balijiang Hydrometric Station,which met the requirements of the current hydrological integration specifications.The method can assist in the arrangement of flow measuring,improve the accuracy of flood forecasting and implement flow online monitoring in the future.