Loading…

FLUVIAL SENSITIVITY OF MAIN DRAINAGE OF THE SAGRADO RIVER WATERSHED--SERRA DO MAR PARANAENSE/SENSITIVIDADE FLUVIAL DA DRENAGEM PRINCIPAL DA BACIA HIDROGRAFICA DO RIO SAGRADO SERRA DO MAR PARANAENSE

The fluvial sensitivity allows to recognize points subject to changes in the drainage network, identified by the resistance forces (ability of the system to withstand a change of the initial state) and disturbance (energy applications such as climate, biotic and anthropic interference). Thus, the re...

Full description

Saved in:
Bibliographic Details
Published in:Ra'e ga 2017-08 (41), p.174
Main Authors: Kleina, Monica, dos Santos, Leonardo Jose Cordeiro
Format: Article
Language:Spanish
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The fluvial sensitivity allows to recognize points subject to changes in the drainage network, identified by the resistance forces (ability of the system to withstand a change of the initial state) and disturbance (energy applications such as climate, biotic and anthropic interference). Thus, the research's objective is to map the fluvial sensitivity in the major rivers that compose the Sagrado River watershed, located in Morretes, Serra do Mar, Parana State. In order to obtain the results, it was necessary to identify the style and fluvial adjustments, erosion concentration, fluvial connectivity and land use evolution in the basin. The data were overlapped and confronted, evidencing that the major disturbances were located in Sagrado and Sambaqui rivers, especially near the plains areas, classified as high sensitivity. In contrast, rivers bordered by high slopes of the Serra do Mar, covered with vegetation in medium/advanced stage, are situated places of probability of minor changes, being named as low sensitivity. So it is concluded that thirds of rivers located in plains have low resistance and a lot of changes in land use, whereas in high declivity, in confined and partially confined fluvial valleys, the sensitivity appears low. KEY-WORDS: Resistance; Disturbance; Changes; Fluvial system. A sensitividade fluvial permite reconhecer pontos sujeitos as mudancas na rede de drenagem, identificadas por meio das forcas de resistencia (capacidade do sistema em resistir a uma alteracao do estado inicial) e perturbacao (aplicacoes de energias, como clima, interferencias bioticas e antropicas). Diante do exposto, o presente trabalho tem como objetivo determinar a sensitividade fluvial nas principais drenagens que compoem a bacia hidrografica do rio Sagrado, localizada em Morretes, na Serra do Mar paranaense. Para obtencao dos resultados, tornou-se necessaria a identificacao dos estilos e ajustes fluviais, concentracao de erosao, conectividade fluvial e evolucao da ocupacao da terra na bacia. Os dados foram sobrepostos e analisados, evidenciando que as maiores perturbacoes foram localizadas nos rios Sagrado e Sambaqui, principalmente proximas as planicies, classificadas como alta sensitividade. Diferentemente, rios margeados pelas altas declividades da Serra do Mar, recobertos por vegetacao em estagio medio/avancado, situam-se locais com pouca probabilidade de mudancas, sendo denominadas como baixa sensitividade. Assim conclui-se que os tercos de rios localizados
ISSN:1516-4136
DOI:10.5380/raega