摘要
感潮河段水位流量时空变化复杂,可运用在线监测系统实现流量整编。为提高流量在线监测系统的测验精度,利用实测数据从代表流速精度控制、断面面积精度控制、代表流速拟合方案优选等3个方面对可能导致结果产生误差的因素进行分析。结果表明:通过合理比选代表流速位置、进行代表流速断面投影、适当延长定点ADCP测速历时、对数据进行平滑处理以及优化选择面积测量方式等,可以有效保证模型精度,满足水文整编规范要求。
Tidal river section has a complex spatial and temporal variations of water level and discharge.Therefore,the on-line monitoring system could be applied for the tidal river discharge data compilation.Aimed at enhancing the accuracy of on-line measuring system,the measured data were used to analyze the factors that may cause errors in the results from three aspects:precision control of representative velocity,precision control of cross-sectional area and optimization of representative velocity fitting schemes.The results indicated that through reasonable comparison and selection of index velocity position,projection of index velocity cross section,appropriately extension of fixed point ADCP velocity measuring duration,processing of data smoothing,and optimized selection of area measurement etc.,the optimized method can effectively satisfy the accuracy of online flow measuring system.
作者
陈佳伟
曾瑞
毛金锋
胡纲
CHEN Jiawei;ZENG Rui;MAO Jinfeng;HU Gang(Lower Reaches of Changjiang Hydrology and Water Resources Survey Bureau,Changjiang Water Resources Commission,Nanjing 210011,China)
出处
《水利水电快报》
2023年第5期6-11,31,共7页
Express Water Resources & Hydropower Information
关键词
流量测验
精度分析
代表流速
ADCP
感潮河段
flow measurement
accuracy analysis
representative velocity
ADCP
tidal reach
