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Utilizando o teste de Mann-Kendall, objetivou-se nesse trabalho, analisar as tendencias nas series de cotas dos rios principais dasbacias hidrograficas do Estado do Ceara. As bacias hidrograficas do Ceara estudadas aqui foram: Bacia do Medio, Alto, Baixo Jaguaribe, Bacia do Salgado, Bacia Acarau, Bacia Curu, Bacia de Ibiapaba, Bacia do Banabuiu, Bacia Coreau, Bacia do Litoral. Foram utilizados os dados de cotas dos rios principais dessas bacias hidrograficas, cujos nomes das bacias hidrograficas sao os mesmos desses rios cearenses. Os dados foram obtidos por meio da Agencia Nacional das Aguas para o periodo de 1973 a 2013. Para identificar as possiveis causas climaticas, utilizou-se a Analise de Ondeleta, a qual identifica as escalas temporais dominantes dos fenomenos e sistemas meteorologicos. Duas dessas Bacias hidrograficas mostraram tendencia de diminuicao na cota de seus rios principais, enquanto outras duas apresentaram tendencia de aumento.Verificou-se que a escala decadal domina sobre as variacoes de cotas, sugerindo que a Oscilacao Decadal do Pacifico tem influencia direta sobre o nivel dos rios e, associada ao sinal persistente de El Nino Oscilacao Sul (7 anos), promoveram aumento e diminuicao das cotas, dependendo de suas fases. Desse modo, com acompanhamento hidroclimatico, os gestores de recursos hidricos e setores da economia e sociedade podem tirar proveito dessas importantes informacoes com previsao antecipada. Normal 0 21 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman","serif"; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; color:black; mso-themecolor:text1; mso-ansi-language:EN-US; mso-fareast-language:EN-US;} A B S T R A C T Using the Mann-Kendall test, this study aimed to analyze the trends in the shares of the major rivers of the watershed of the State of Ceara series. Basinhydrographics of Ceara studied here were: Medio, Alto, BaixoJaguaribe Basin, Salgado Basin, Acarau Basin, BaciaCuru, Ibiapaba Basin, Banabuiu Basin, Coreau Basin, Litoral Basin. Itsused data levelsof the main rivers of these Basin hydrographics, river basins whose names are the same cearenses these rivers. Data were obtained through the National Water Agency for the period 1973 to 2013 to identify possible causes climate, we used the wavelet analysis, which identifies the dominant temporal scales phenomena and weather systems. Two of these river basins showed declining trend in share of its major rivers, while two others showed a tendency to increase. Checkthat the decadal-scale variations dominates over quota, suggesting that the Pacific Decadal Oscillation has a direct influence on the level rivers and associated with a persistent signal of El Nino Southern Oscillation (7 years), caused an increase and decrease in quotas, depending on their stages. Thus, with climatemonitoring water resource managers and sectors of the economy and society can benefit from this important information with advance forecast. Keywords : Mann-Kendall test, Water Resources Management, Jose and Noe effect, Wavelet analisys.

revista brasileira de geografia física

Tendências no Nível do Rio de Bacias Hidrográficas do Estado do Ceará e Suas Causas Climáticas (Trends in Level River of Basin Hydrographic of the Ceará State and Its Causes Climate)