Tendências temporais dos recursos hídricos na Sub-Bacia Hidrográfica do Médio Jaguaribe (Trends temporary water resources in hydrographic sub- basin the médio Jaguaribe)
DOI:
https://doi.org/10.5935/1984-2295.20160168Keywords:
Teste de Mann-Kendall, Precipitação, Efeito de José e NoéAbstract
A água apesar de ser um recurso abundante é um bem finito e sua disponibilidade e distribuição é limitada. Deste modo, é de fundamental importância estudos voltados para monitoramento de tal recurso, com o intuito de garantir que a disponibilidade seja compatível com a demanda, e evitar o seu uso indiscriminado. Portanto, pretendeu-se investigar qual a situação da disponibilidade hídrica nos municípios pertencentes à Sub-bacia hidrográfica do Médio Jaguaribe. Os dados utilizados foram obtidos junto à Agência Nacional das Águas (ANA), para as cidades de Jaguaribe, Jaguaretama, Jaguaribara, Deputado Irapuan Pinheiro, Milhã, Pereiro, Potiretama, São João do Jaguaribe, Alto Santo, Ererê, Iracema e Tabuleiro do Norte, para as variáveis cota, vazão e precipitação para o período de 1978 a 2014 (37 anos), havendo em alguns casos, indisponibilidade de dados. Para análise das tendências nos dados foi aplicado o Teste de Mann Kendall e o teste de significância de T-Student. Para todo o período analisado, as análises de tendência evidenciam que os municípios de Jaguaribe, Jaguaretama, Jaguaribara, Deputado Irapuan Pinheiro, Milhã, Pereiro, Potiretama, São João do Jaguaribe apresentaram diminuição na precipitação, e apenas os municípios de Alto Santo, Ererê, Iracema e Tabuleiro do Norte apresentaram tendências de aumento. Observou-se que ocorreu a diminuição de cotas e vazões em locais que também foram observados aumento de precipitações, ou seja, a quantidade de chuva aumentou mas a quantidade água nos rios diminuiu devido uso da água.
A B S T R A C T
The water despite being an abundant resource is a finite resource and its availability and distribution is limited. Thus it is extremely important studies about monitoring your in order to ensure that the availability is compatible with the demand, and prevent its indiscriminate use. Therefore it’s aimed to investigate the situation of water availability in the municipalities belonging to the Watershed of the Médio Jaguaribe, as well as have been used to water in the region. Efforts were also made to see how the use of water influenced the river levels are belonging to basin. The data used were obtained from the National Water Agency (ANA), to the cities of Jaguaribe, Jaguaretama, Jaguaribara, Deputado Irapuan Pinheiro, Milha, Pereiro, Potiretama, São João do Jaguaribe, Alto Santo, Ererê, Iracema and Tabuleiro do Norte for the variables height, flow and rainfall for the period 1978-2014 (37 years), with in some cases, unavailability of data. However due to lack of data availability, some cities had the following periods: 1989-2014 (26 years), 1943-1964 (22 years), 1980-2014 (34 years), and 1949-1981 (33 years). For analysis of data trends were applied the Mann Kendall test and the T-Student significance test. For the whole period, the trend analyzes show that the municipalities of Jaguaribe, Jaguaretama, Jaguaribara, Irapuan Pinheiro, Milha, Pereiro, Potiretama, São João do Jaguaribe showed a decrease in precipitation, and only the municipalities of Alto Santo, Ererê, Iracema and Tabuleiro do Norte showed increasing trends. It was observed that there was a decrease in height and flow that were also observed increase of precipitation, this is, the amount of precipitation increased but the amount of water in rivers decreased due use of water.
Keyworks: Mann-Kendall Test, Rainfall, José and Noé Effect
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