关键词: H-ADCP; 多层流速测量; 断面流量计算; 陶岔水文站; 南水北调中线工程;

Abstract: Accurate and efficient monitoring of river cross-section discharge has always been the focus of online hydrological monitoring.In order to solve the problems, such as difficult to collect distributed data of river cross-section velocity and tough to build model for index velocity formula, large error in the existing online current flow measurement technology, we proposed a multi-layered velocity measurement method based on H-ADCP.The flow calculation formulas for the measured and blind areas are provided by the partial flow accumulation method.And the implementation process of on-line flow measurement system based on this method is introduced.Taking the test section of the Taocha Hydrologic Station at the head of the middle route of South to North Water Diversion Project as an example, we carried out error analysis on discharge calculation results based on this method and that based on navigable ADCP.The results show that the online flow monitoring system built by this method has high measurement accuracy and good timeliness, and it has a good reference to the application of H-ADCP used in flow on-line monitoring.

Key words: H-ADCP; multi-layered velocity measurement; section discharge calculation; Taocha Hydrologic Station; Middle Route of South to North Water Diversion Project;