Author(s): Farhad Bahmanpouri, Naziano Filizola, Marco Ianniruberto, Carlo Gualtieri
Linked Author(s): Farhad Bahmanpouri
Keywords: Environmental hydraulics, negro/solimoes confluence, hydrodynamics, ADCP, data presentation
Abstract: Confluences are very complex fluvial networks where the combination of matter (water and sediment) and energy (flow strength) from two different channels take place. The confluence of Rio Negro, with its black waters, and the Rio Solim�es, with its suspended white sediments, is one of the biggest confluences on the earth and attracts thousands of tourists every year near by the city of Manaus, Amazonas � Brazil. This paper presents the application of a new method to analyze the ADCP data which is using an in-house FORTRAN code in combination with the Tecplot and Surfer Softwares. The method is applied to ADCP transects collected on this confluence within the EU-funded Clim-Amazon Project in two different periods of the hydrological cycle: low flow conditions on 30 and 31 October 2014, during the FS?CNS1 campaign, and relatively high flow conditions on 29 and 30 April 2015, during the FS?CNS2 campaign, both of them included 23 transects. These data are first extracted with WinRiver II software to produce ASCII files. The ASCII files are first processed using the code to derive input files containing the three velocity components, the average backscatter as well as the secondary currents from the Rozovskii method. These data are plotted in Tecplot to gain cross-sectional profiles. Furthermore, as past investigations are limited to the analysis of the depth-averaged quantities, the FORTRAN code is used even to extract the values of the velocity components as well as the backscatter along three layers in the channel: near the bed, at mid-depth and near the water surface. The data are then used to prepare Surfer maps, in a plane contour map format, of these quantities. The analysis of the data along these three layers can provide further findings into the complex three-dimensional structure of the flow at the Negro/Solim�es confluence
Year: 2017