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EVALUATION OF A DEPTH PROPORTIONAL INTAKE DEVICE FOR AUTOMATIC PUMPING SAMPLERS 1
Author(s) -
Eads Rand E.,
Thomas Robert B.
Publication year - 1983
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1983.tb05328.x
Subject(s) - boom , environmental science , nozzle , streams , hydrology (agriculture) , sediment , sampling (signal processing) , float (project management) , marine engineering , debris , river bed , geology , geotechnical engineering , environmental engineering , engineering , oceanography , geomorphology , computer science , mechanical engineering , computer network , electrical engineering , filter (signal processing)
A depth proportional intake boom for portable pumping samplers was used to collect suspended sediment samples in two coastal streams for three winters. The boom pivots on the stream bed while a float on the downstream end allows debris to depress the boom and pass without becoming trapped. This equipment modifies point sampling by maintaining the intake nozzle at the same proportion of water depth regardless of stage. Data taken by pumping samplers with intakes mounted on the boom were compared with depth integrated hand samples. Pumped samples showed higher concentrations than depth integrated hand samples. Results suggested that cross‐sectional sampling can give high precision with proper placement and calibration of a boom mounted intake.