Study of sediment transport in the Jordão River, located in the mesoregion of the Triângulo Mineiro-MG

Rodrigo de Almeida Oliveira Peixoto,Carlos Eugenio Pereira,Marcio Ricardo Salla,José Eduardo Alamy Filho

doi:10.4025/actascitechnol.v43i1.51714

Abstract

Hydrosedimentological studies are fundamental for the adequate management of water resources. The Jordão River, the research study area, has the potential to generate electricity to serve a region of the TriânguloMineiro and Alto Paranaíba. In this sense, the understanding of sediment transport resources is important, since it represents a fundamental contribution for ensuring adequate management of water resources in the region. This research study has the general objective of examining sediment transport in the Jordão River, with the aim of obtaining a preliminary understanding into the dynamics of solid particles in this water body. To this end, the determination of the key curves of Flow vs Sediment concentration, the characterization of the sediment granulometry and the hydraulic and geometric aspects of the studied stations, as well as the analysis of the factors that influence the dynamics of sediments in the river, will be carried out. For this purpose, four sampling stations were established, fourteen campaigns were carried out for flow measurements and water and sediment collections for the analysis of suspended and bed sediments in dry and rainy seasons from August 2017 to December 2018. A relationship between suspended sediment concentration and liquid discharge is found in the literature as Css = α·Qβ, at the four stations on the Jordan River during the measured period, with a value of 14.593 <α <26.904 and 0.6722 <β <0.9462, along with the graph representing all values Css = 22.944·Q0.6991. Noteworthy from the collections carried out is the relationship between rainy and dry seasons, where there is no increase verified in the filming of sediments with the increase in the flow of the river. Regarding the bed solids obtained through granulometric curves, there is a noted deposit of sediments with less granulometry in the dry season, mainly in seasons 3 and 4.

Highlights

In the formation of planet earth, for the emergence of organisms and appearance of the human species, the formation of rocks by the aggregation of minerals and subsequent formation of soils were essential
The determination of the key curves of Flow vs Sediment concentration, the characterization of the sediment granulometry and the hydraulic and geometric aspects of the studied stations, along with the analysis of the factors that influence the dynamics of sediments in the river, will be performed
It is interesting to note that the average hydraulic radius value is higher than the other sections, showing the tendency of this region to present a greater wet area when compared to other stations, configuring a flow that interferes less in the background particles and has less influence on the transport of these particles

Summary

Introduction

In the formation of planet earth, for the emergence of organisms and appearance of the human species, the formation of rocks by the aggregation of minerals and subsequent formation of soils were essential. Research by Arcova and Cicco (1997) highlighted that the degradation of vegetation and the agricultural use of watershed contribute to intensifying the process of silting up and erosion of the margins of water courses, in addition to compromising or unbalancing the ecosystem, water quality and increasing the sediment transport in rivers Continuing within this context, Carvalho (2008), Vanzela, Hernandez and Franco (2010), Cabral and Reis (2015), and Aparecido, Vanzela, Vazquez and Lima (2016), highlighted the influence of land use on the concentration and load of sediments in the water body. In addition to the generation of electrical energy, the understanding of sediment dynamics in the study area is important, since the region presents evidence of erosive processes that affect the environmental quality and especially the sediment load in the water body. The determination of the key curves of Flow vs Sediment concentration, the characterization of the sediment granulometry and the hydraulic and geometric aspects of the studied stations, along with the analysis of the factors that influence the dynamics of sediments in the river, will be performed

Material and methods

Results and discussion

Conclusion