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Home  >  Volume 32 (Nov. 2015)

A Comparative Study of Stream-Gaging Methods Employed in Non-point Source Pollution Studies in Small Streams by nifade Y. S., Bello R., Olaseni V. B., and Orduen B. S. (pages 291-298)
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The demand for accurate stream flow measurement has increased with the rising concern about nonpoint source (NPS) pollution. NPS pollution studies, such as Total Maximum Daly Load (TMDL) development, often involve quantification of flow in small first and second order streams. The comparative analysis of the current technologies which is used to measure flow in small streams with respect to its accuracy is made.  This involved field and laboratory experimental investigation to compare the accuracy of various methods for estimating stream discharge in small first and second order streams and also to compare the accuracy of various methods for estimating stream discharge in a controlled laboratory environment. Ten stream-gagging methods were evaluated for field and laboratory performance. The analysis of the field investigation data indicated that Marsh McBirney current meter and One-Orange method were the most accurate among the methods studied. The results of the laboratory experiments imply that the Starflow acoustic Doppler and Valeport BFM001 current meter performed best among the ten methods. The overall best performance for both field and laboratory situations among the methods evaluated were exhibited in Marsh McBirney and Valeport BFM001 current meters.

 Keywords: Stream – Gaging, Pollution, Streams, Nonpoint Source, Measurement