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Irrigation canal discharge measurement by using commercial digital video camera
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|Title: ||Irrigation canal discharge measurement by using commercial digital video camera|
|Authors: ||Huang, W. C.|
Lee, M. C.
Leu, J. M.
Lai, C. J.
Chan, H. C.
|Keywords: ||Flow measurements|
|Issue Date: ||13-Sep-2006|
|Publisher: ||Michael Piasecki and College of Engineering, Drexel University|
|Citation: ||Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732|
|Abstract: ||This study present the image measurement techniques on the surface velocity field and water stage.
The images of free surface and stage gauge are obtained from commercial digital video camera.
Time series of surface velocity and stage had been collected simultaneously. Knowledge of flow
filed in a irrigation canal was essential for computing discharge. Large scale particle image
velocimetry（ LSPIV）was used to determine surface velocities in the irrigation canal. LSPIV
proceeds by using the bubbles float on the water surface as the tracer particles, and making crosscorrelation
analys is between two continuous images. Thus, it can calculate the speed and direction
of tracer particles. The whole surface velocity distribution in a irrigation canal can be obtained. The
water stage of canal obtains from the digital video camera images by making use of image segment
to separate stage gauge and background. Discharge computed by using the surface velocities and
water stage via open channel velocity distribution theory. Comparing the image techniques
measured discharge with Parshall flume data shows the differences are to be less then 5％. The
results suggest that the developed image measurement techniques can be used in the applications to
estimate irrigation canal discharge effectively.|
|Description: ||Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE) hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization.|
|Appears in Collections:||Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]|
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