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A comparison between the suspended sediment concentrations derived from DELFT3D model and collected using transmissometer – a case study in tidally dominated area of Dithmarschen Bight

Rahbani M.

Oceanologia

2015

No. 57 (1)

44--49

The objective of this investigation is to verify the deficiencies that incorporate both modelled and measured suspended sediment concentrations (SSC) data in a tidal dominated area. For this purpose a tidal channel, in the North Sea, was considered as the case study. The profiles of SSC from a model were compared with those from the field, in which some dissimilarity was observed. Intensive investigations were carried out to detect that the most discrepancies occur in shallow parts of the area and also during the low velocities. The origin of the shortcomings in regard with the modelling and measuring technique are discussed.

Optoelektroniczne urządzenia do pomiaru zasięgu widzialności

Synak R.

Elektronika : konstrukcje, technologie, zastosowania

2008

Vol. 49, nr 5

100-106

Przedstawiono teoretyczne podstawy pomiaru zasięgu widzialności i metody pomiaru tego parametru, a także scharakteryzowano urządzenia i systemy pomiarowe wytwarzane obecnie głównie na potrzeby komunikacji lotniczej i drogowej. Opisano również transmisometr laserowy opracowany w Instytucie Maszyn Matematycznych.

Theoretical fundamentals of visibility range measurements and methods for measuring this parameter are presented in the paper. Characteristic of instruments and systems produced now for needs of aerial and land communication is also given. A laser transmissometer elaborated in the Institute of Mathematical Machines is also described.