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In situ measurement of particle size in estuarine waters
Affiliation:1. OLEM, Institute of Mechanics, Bulgarian Academy of Sciences, Sofia, Bulgaria;2. Research Institute for Nuclear Problems, Belarusian State University, Minsk, Belarus;3. National Research Tomsk State University, Tomsk, Russia;4. Vilnius University, Vilnius, Lithuania;1. Department of Information Management, Ling-Tung University, No.1, Ling-Tung Rd., Taichung, 408, Taiwan, ROC;2. Natural Science Division in General Education Center, Ling-Tung University, No.1, Ling-Tung Rd., Taichung, 408, Taiwan, ROC;3. Department of Civil and Environmental Engineering, University of Houston, Houston, TX, USA;4. Department of Civil Engineering, National Chung Hshin University, Taichung, 402, Taiwan, ROC;5. Department of Civil Engineering, University of Kirkuk, Kirkuk, Iraq;1. Materials Science and Engineering Arizona State University, Tempe, AZ 85287, USA;2. IMDEA Materials Institute, c/ Eric Kandel 2, 28906 Getafe, Madrid, Spain;3. Department of Mechanical Engineering, University of New Mexico, Albuquerque, NM, USA;4. Department of Materials Science. Polytechnic University of Madrid. E. T. S. de Ingenieros de Caminos, 28040 Madrid, Spain;1. DTU DANCHIP, Technical University of Denmark, Building 347, Kgs. Lyngby DK-2800, Denmark;2. Department of Physics, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark;3. ID06, European Synchrotron Radiation Facility, Grenoble 38000, France;4. DTU Nanotech and CINF, Technical University of Denmark, Building 345E, Kgs. Lyngby DK-2800, Denmark;5. Danish Fundamental Metrology, Building 307, Kgs. Lyngby DK-2800, Denmark;1. Borsod-Abaúj-Zemplén County Hospital and University Teaching Hospital, Miskolc, Hungary;2. Department of Ophthalmology, University of Debrecen, Debrecen, Hungary
Abstract:A novel approach to particle sizing in estuarine waters using a submersible laser diffraction instrument is described. In situ measurements with this instrument are rapid and avoid both the physical disruption of fragile aggregates with pumping and the settlement of larger particles in isolated samples which interfere with currently available sizing techniques. Measurements of the size distributions of suspended particle populations in the Tamar Estuary using this apparatus are compared with measurements carried out on discrete samples obtained from the same depth by pumping. The results confirm the fragile nature of estuarine aggregates and the necessity for in situ measurements in studies of estuarine suspended particle dynamics and fluxes.
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