Data: 24/09/2018 à 28/09/2018
Mais informações: https://www.abrh.org.br/xiiienes/
DISTRIBUIÇÃO, TEXTURA E MORFOSCOPIA DOS SEDIMENTOS DO RESERVATÓRIO DE DUAS BOCAS- CARIACICA ES
MEDIÇÃO, MODELAGEM, TÉCNICAS E TECNOLOGIAS NO CONTEXTO DA HIDROSSEDIMENTOLOGIA
The present work aimed to distinguishthe granulometric distribution, and to characterize the texture and morphology of the sediments collected from Duas Bocas reservoir -Cariacica (ES). For this, 51 samples were collected, distributed in different points of the reservoir to cover all existing areas. The particle size distribution analysis was made following some steps of collection and pretreatment of the samples from the drying, homogenization and fragmentation. Two stages were performed: a fraction of the sediments of coarse size, through sieving, method described in Suguio (1973) using the Wentworth scale (1922) and the fraction of fine particle sizes, was analyzed by the laser diffraction technique with the Malvern equipment. At the same time, the morphoscopic analysis of the sand grains evaluated the degree of rounding and its surface texture. From the analysis made it was possible to observe that there is a grain variability in Duas Bocas reservoir. Thick fractions are distributed, mainly, in the inlet of the reservoir, in environments of greater energy for the transport and, thinner fractions are found in the passage from the fluvial depositional process to the lacustrine environment. From the morphoscopy of the grains was evidenced that in general, the grains have degree of subangle rounding, varying the percentages between the points and, demonstrating that these grains were recently inserted in the sedimentary cycle and are close to their source areas.