Evaluation of low-cost methods for discharge measurements in rivers

  • Luiz Henrique Maldonado Itaipu Binacional - Foz do Iguaçu, PR, Brasil
  • Edson Cezar Wendland Universidade de São Paulo (USP) - Campus de São Carlos
  • Rodrigo de Melo Porto Universidade de São Paulo (USP) - Campus de São Carlos
Keywords: culvert, eletromagnetic flowmeter, fluviometry, hydrometry

Abstract

Increasing rates of pollution and over-exploitation have reduced the availability of water in many regions of the world. In this context, the qualitative and quantitative management of available water resources becomes paramount. Thus, this study evaluated the applicability of two low-cost discharge measurement methods that are adequately precise: the electromagnetic method and the culvert method. The methods were applied in the field (Ribeirão da Onça Basin) in order to assess their advantages and disadvantages with reference to the conventional method of discharge measurement. Compared with the traditional method, the electromagnetic method resulted in a deviation of -5%, but allowed velocity measurements in the turbulent conditions caused by the channel’s side walls. The culvert method resulted in discharge deviations of 2.1%; however, it had limitations in high water situations. The two low-cost methods showed good results in determining the rate of discharge, but it is crucial to understand their operational limitations.

Author Biographies

Luiz Henrique Maldonado, Itaipu Binacional - Foz do Iguaçu, PR, Brasil
Tem experiência na área de Engenharia, com ênfase em Recursos Hídricoss, Hidráulica e Hidrometria, atuando principalmente nos seguintes temas: medições de vazão (ADCP e molinete), batimetria, sistemas telemétricos e hidrodinâmica em canais naturais.
Edson Cezar Wendland, Universidade de São Paulo (USP) - Campus de São Carlos
Tem experiência na área de Engenharia, com ênfase em Recursos Hídricos, atuando principalmente nos seguintes temas: água subterrânea, simulação numérica, aqüífero guarani, recarga e recursos hídricos.
Rodrigo de Melo Porto, Universidade de São Paulo (USP) - Campus de São Carlos
Tem experiência na área de Engenharia Civil, com ênfase em Engenharia Hidráulica. Atuando principalmente nos seguintes temas: Drenagem urbana, Controle de cheias e Bacia de Detenção.
Published
02/04/2015
Section
Papers