Estratégias de amostragem para estimar a concentração de sedimentos em suspensão para a calibração do turbidímetro

Translated title of the contribution: Sampling strategies to estimate suspended sediment concentration for turbidimeter calibration

Leandro Dalbianco, Rafael Ramon, Claudia A.P. de Barros, Jean P.G. Minella, Gustavo H. Merten, Elizeu J. Didoné

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The influx of sediments carried by rivers can be measured continuously using a turbidimeter through the indirect relationship between turbidity and suspended sediment concentration (SSC). However, this process is dependent on obtaining water samples with suspended sediments to calibrate the turbidimeter. Sampling can be carried out through different methods, resulting in errors and uncertainties in estimating the SSC. Four different possibilities for the composition of the calibration curve were tested in order to evaluate the effectiveness of the turbidimeter calibration for different sampling strategies. The study was conducted in 2012 and 2013 in two catchments in southern Brazil that had a strong sediment yield impact. The results indicate that sampling during rainfall events generate a significant and representative SSC for the turbidimeter calibration. The use of an integrating sampler for synthetic samples provides an effective calibration, but overestimates SSC compared to calibration from rainfall event sampling. The samples collected at fixed intervals -weekly and daily -generated an insufficient amount of data and are not representative of real sediment concentrations of the catchments.

Translated title of the contributionSampling strategies to estimate suspended sediment concentration for turbidimeter calibration
Original languagePortuguese
Pages (from-to)884-889
Number of pages6
JournalRevista Brasileira de Engenharia Agricola e Ambiental
Volume21
Issue number12
DOIs
StatePublished - Dec 2017

Keywords

  • Automatic sensors
  • Rainfall event
  • Sampling
  • Turbidity

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