| 摘要 |
PROBLEM TO BE SOLVED: To establish highly accurate methods and systems for measuring flow velocities of rivers and river flow rates. SOLUTION: A water surface of the overall length of the width of a river is divided into a plurality and imaged by a plurality of imaging means 3 for remote monitoring, and the water level of the river to be imaged is measured by a water level measuring means 23. Image signals by the imaging means 3 and water level data by the water level measuring means 23 are transmitted to a control unit 17. At the control unit 17, flow velocities in an area to be measured of a plurality of previously set traverse line segments in the width direction of the river are computed by analyzing the image signals by a concentration gradient method, and the cross-sectional area of the river in the width direction of the river is computed on the basis of the water level data. On the basis of both the cross-sectional area of the river and a flow velocity value of each traverse line segment, a highly accurate total quantity of flow is computed. COPYRIGHT: (C)2006,JPO&NCIPI
|
