A necessidade de estudos sobre as questões ambientais, tais como os recursos hídricos, são cada vez mais essenciais como forma de mitigar os impactos adversos promovidos pelas ações antrópicas. Neste sentido o presente artigo visa analisar a dinâmica fluvial e sua relação com as características limnológicas do córrego do Cedro localizado no município de Presidente Prudente- SP. Para tanto, este estudo avaliou três seções transversais situadas no alto, médio e baixo curso deste ambiente lótico, sendo realizadas coletas em campo de amostras dos principais parâmetros associados a geometria hidráulica do canal como: vazão (Q), largura (w), profundidade (d), e velocidade (v). Para a caracterização limnológica do córrego em questão coletou-se informações sobre o Potencial Hidrogeniônico (pH), com o auxílio de um pHmetro, e a Turbidez (para a qual se utilizou um turbidímetro) e ainda a coleta de sedimentos em suspensão e de leito. A avaliação da carga detrítica em suspensão e de fundo ocorreram no Laboratório de Geologia, Geomorfologia e Recursos Hídricos da Universidade Estadual Paulista (UNESP) campus de Presidente Prudente- SP. Os resultados obtidos demonstram que tanto a dinâmica fluvial quanto as variáveis limnológicas analisadas vêm sofrendo com as formas de uso da terra na bacia repercutindo na entrada de material alóctone de origem tecnogênica, promovendo mudanças no ajuste do sistema fluvial e alterações na característica física e química da água. Dessa forma o estudo tem se mostrado eficaz na correlação entre os dados de geometria hidráulica e limnologia na avaliação ambiental da área em questão. Fluvial Dynamics and Limnological Characterization of Cedro Stream, President Prudente-SP A B S T R A C TThe need for studies on environmental issues, such as water resources, is increasingly essential as a way of mitigating the adverse impacts caused by human actions. In this sense this article aims to analyze the river dynamics and its relationship with the limnological characteristics of the Cedro stream located in the city of Presidente Prudente-SP. For this, this study evaluated three cross sections located in the high, medium and low course of this lotic environment. Samples were collected in the field of the main parameters associated with the channel hydraulic geometry, such as flow (Q), width (w), depth. (d), and velocity (v). For the limnological characterization of the stream in question we collected information about the Hydrogenionic Potential (pH), with the aid of a pH meter, and the Turbidity (for which a turbidimeter was used), as well as the collection of suspended sediment and bed. The evaluation of the suspended and bottom detrimental load occurred at the Laboratory of Geology, Geomorphology and Water Resources of the Universidade Estadual Paulista (UNESP), Presidente Prudente-SP campus. The results show that both the river dynamics and the limnological variables analyzed have been suffering from land use in the basin, resulting in the entry of allochthonous material of technogenic origin, promoting changes in the fluvial system adjustment and changes in the physical and chemical characteristics of the water. Thus, the study has been shown to be effective in correlating the data of hydraulic geometry and limnology in the environmental assessment of the area in question.Keywords: Hydraulic geometry. Limnology. Environmental diagnosis
Este estudo tem como objetivo identificar as possíveis correlações entre as variáveis climáticas de São Luís com os casos notificados de dengue, fazendo isso por meio de Regressão e PCA no período de 2012 a 2015. Os dados climáticos foram disponibilizados pelo INMET, analisou-se as variáveis de temperatura (máxima, média e mínima), umidade relativa, pressão atmosférica, precipitação e os dados de casos de dengue, disponibilizados pela Secretaria Estadual de Sáude do Maranhão. Estes dados foram analisados utilizando o software Statistica 7.0. Foi obtido como resultado que a correlação entre a umidade e pluviosidade e os casos de dengue. A temperatura apresentou correlação forte, porem negativa; a pressão atmosférica apresentou correlação fraca com a dengue.
Dengue is a viral disease, transmitted by Aedes aegypti, which presents its spatial distribution related to climatic influences, with wide tropical distribution. The study analyzed the relationship between climate and dengue incidence rates, between 2015 and 2016, in the city of São Luís-MA. Descriptive and analytical statistical procedures were performed to extract information from the levels and forms of relations between the climatic variables and the number of cases of the disease, as well as the degree of contribution to the scenario analysed using Principal Component Analyses (PCA), based on their correlation. From 2015 to 2016, 7,143 notifications of dengue cases were registered for the municipality, with more than 2/3 only in 2016. High but not extreme temperatures and the high humidity, caused by rainfall levels and the proximity of the oceanic masses and the equator, are propitious to the development of the vector, presenting a distinct trend after the optimum point. For precipitation and humidity, the cases correlated directly proportional, as expected, presenting the highest number of cases of the disease for the periods of higher values of these variables. Although the temperatures have a positive association, in this study, the high temperatures had a directly proportional influence up to 29°, being inversely proportional for higher ranges. The atmospheric pressure and wind speed were not very expressive in the analyses, contributing little to the cases analyzed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.