Análise de 40 Anos de Precipitação Pluviométrica da Bacia Hidrográfica do Rio Espinharas – PB. (Analysis of 40 Years of the Rainfall in River Basin Espinharas - PB)
DOI:
https://doi.org/10.5935/1984-2295.20150073Keywords:
Precipitação, bacia hidrográfica, clima, variabilidade da chuva, análise climática.Abstract
R E S U M O
Este artigo tem o objetivo de analisar os últimos 40 anos de precipitação pluviométrica e identificar padrões temporais da chuva na bacia hidrográfica do rio Espinharas – PB. Para isso foi utilizado dados de precipitação de seis postos pluviométrico localizado na área em estudo, os dados de precipitação foram obtidos na AESA e ANA. Os postos pluviométricos apresentavam poucas falhas, no entanto, foi aplicada uma técnica de preenchimento de falhas. Posteriormente, foi feita a análise de dupla massa, traçado a média aritmética. Foi utilizado o índice de anomalia da chuva (IAC) pra definir a frequência dos anos secos e chuvosos. Dessa forma, o presente estudo constatou que o total de precipitação ao longo dos anos diminuiu significativamente.
A B S T R A C T
This article aims to analyze the last 40 years of precipitation and identify patterns of rain in the catchment area of the river Espiranhas – PB. For this was used six posts rainfall precipitation data located in the study area, precipitation data were obtained from AESA and ANA. The pluviometric stations had few flaws, however, a gap filling technique was applied. It was subsequently made double mass analysis, the arithmetic average stroke. Was used rain anomaly index (IAC) to set the frequency of dry and wet years. Thus, the present study found that the total precipitation decreased significantly over the years.
Keywords: Rainfall; hydrographic basin; climate variability; IAC.
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