Print Email Facebook Twitter Some characteristics of USP-61 and Delft Bottle suspended sediment samplers Title Some characteristics of USP-61 and Delft Bottle suspended sediment samplers Author Dijkman, J. Contributor De Vries, M. (mentor) Ribberink, J.S. (mentor) Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Programme Environmental Fluid Dynamics Date 1978-09-01 Abstract Field measurements of suspended sediment transport are important with respect to the development and verification of theoretical models and with respect to the description of boundary conditions in morphological computations. A wide range of instruments has been developed to col1ect samples of the sediment in suspension in order to calculate the suspended sediment transport in rivers and estuaries and along shores. These instruments vary from simple bottles to rather sophisticated acoustical devices. Two suspended sediment samplers, viz. the USP-61 and the Delft Bottle, are studied here. Comparative field tests in 1975 and 1976 in the catchment area of the Rio Magdalena (Columbia) delivered measuring results obtained with an USP-61-that were about 250 percent larger in magnitude than the results obtained with a Delft Bottle. To explain this difference an investigation program was started in which this study is a first step. The main goal of this study was to obtain for both samplers an impression about the sampler characteristics and the reliability of the measuring result. An extensive measuring program concerning all possible parameters was less attractive at that moment. The properties known at present (1978} of USP~61 and Delft Bottle are described and discussed in Chapters 2 and 3 respectively. The measurements described in Chapter 4 deal with the ability of both samplers to catch sediment particles correctly. This ability is expressed in the sampler efficiency. Chapters 5,6 and 7 deal with some specific properties of both instruments. In the hydraulic phenomena observed the velocity in the sampler nozzle and the magnitude of the velocity of the surrounding water, plays a keyrole. Finally Chapter 8 contains conclusions and suggestions for further investigations. (Also Internal Report 5-78) Subject USPsediment To reference this document use: http://resolver.tudelft.nl/uuid:f8f5e862-d033-43ff-bc67-dd96930c93b7 Part of collection Student theses Document type master thesis Rights (c) 1978 Dijkman, J. Files PDF Dijkman1978.pdf 85.16 MB Close viewer /islandora/object/uuid:f8f5e862-d033-43ff-bc67-dd96930c93b7/datastream/OBJ/view