caracterização morfométrica da bacia hidrográfica do igarapé da prata, capitão poço, pará, brasil

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ID: 179812
2016
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Abstract

Este trabalho teve como objetivo realizar a caracterização morfométrica da bacia hidrográfica do igarapé da Prata, localizado no município de Capitão Poço, Pará. Inicialmente gerou-se o Modelo Digital de Elevação a partir de SRTM com resolução espacial de 30 m, utilizando o sistema de informações geográficas, por meio do software ArcGis 10.1 e da extensão ArcHydro, foram calculados alguns parâmetros morfométricos para o estudo do comportamento hidrológico da bacia. A área de drenagem encontrada foi de 115,283 km² e o perímetro de 70,151 km. A bacia hidrográfica do igarapé da Prata tem formato alongado, coeficiente de compacidade de 1,829, fator de forma de 0,356 e índice de circularidade de 0,294. A densidade de drenagem obtida para a bacia foi de 0,525 km/km², com padrão dendrítico. A forma mais alongada da bacia hidrográfica indica que a precipitação pluviométrica sobre ela se distribui em diferentes pontos. De maneira geral, suas características morfométricas denotam um controle estrutural da drenagem eficiente, bem como menor risco de grandes cheias em condições normais de pluviosidade anual e topografia favorável ao escoamento superficial.

Morphometric characterization of Prata catchment, Capitão Poço, Pará, Brazil

Abstract: This study aimed to characterize the morphometric Prata catchment, located in the municipality of the Capitão Poço/PA. In order to do so, a Digital Elevation Model (DEM), spatial resolution of 30 meters, using as database and analysis the system of geographic information, by means of the ArcMap 10.2 and ArcHydro systems. From this, some morphometric parameters of a previous study on the hydrologic behavior of the watershed were calculated. The drainage area was 115,283 km² and 70,151 km in perimeter. The Prata catchment was proven not easily subject to floods as the compacity coefficient was far from the unit (1,829) and its shape factor presented a low value (0,356). Such fact can still be proven by the circularity index value (0,294). The drainage density was 0,525 km/km². The drainage system forms a dendritic pattern. The more elongated watershed shape indicates that the rainwater volume that falls within the watershed is concentrated in different points. The morphometric characteristics denote a structural control of efficient drainage, lower risk of major floods in normal annual rainfall and topography favorable to runoff.

Reference Key
rodrigues2016revistacaracterizao Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Rodrigo Silvano Silva Rodrigues;Lindemberg Lima Fernandes;Diêgo Lima Crispim;Artur Sales de Abreu Vieira;Francisco Carlos Lira Pessoa
Journal sensors
Year 2016
DOI
10.18378/rvads.v11i3.4313
URL
http://www.gvaa.com.br/revista/index.php/RVADS/article/view/4313
Keywords
anthropology recreationenvironmental sciences agriculture (general)geography

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