文章基本信息

标题：REGIÕES COM SIMILARIDADE DE COMPORTAMENTO HÍDRICO NO SUL DO BRASIL
其他标题：SIMILAR REGIONS TO WATER AVAILABILITY IN SOUTHERN BRAZIL
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作者：Marcos Silveira Wrege ; Elenice Fritzsons ; Paulo Henrique Caramori 等
期刊名称：Revista Raega: O Espaço Geográfico em Análise
印刷版ISSN：1516-4136
电子版ISSN：2177-2738
出版年度：2016
卷号：38
页码：365-384
DOI：10.5380/raega.v38i0.43037
摘要：O objetivo deste estudo foi identificar, na Região Sul do Brasil, zonas climáticas homogêneas, usando para esse fim a disponibilidade hídrica e contribuir, assim, para estudos de riscos climáticos na agricultura, pecuária e florestas. As regiões foram delimitadas por análise de agrupamento, com variáveis classificatórias definidas pela disponibilidade mensal de água resultante da diferença (P-ETP) entre a pluviosidade (P) e a evapotranspiração potencial (ETP). A análise permitiu o reconhecimento de seis zonas com disponibilidade hídrica homogêneas na Região Sul do Brasil. O Noroeste do Paraná apresenta menor saldo entre precipitação e evapotranspiração no inverno, enquanto a Metade Sul do Rio Grande do Sul apresenta menor saldo no verão. Nas demais regiões, os saldos têm valores intermediários, havendo regiões com excedente hídrico, entre as quais destaca-se o Litoral e o Sudoeste do Paraná, Oeste de Santa Catarina e Noroeste do Rio Grande do Sul.
其他摘要：The aim of this study was to identify, in southern Brazil, homogeneous climatic zones based on water availability and thus contribute to land use planning studies about reducing climate risks in agriculture, livestock and forests. The regions were defined by cluster analysis using classificatory variables that is defined by monthly water availability. This water availability is resulted from difference between rainfall (P) and potential evapotranspiration (ETP). The result of analysis allowed to the recognition of six homogeneous zones of water availability in southern Brazil. Paraná Northwest has less balance between precipitation and evapotranspiration in the winter, while the southern half of Rio Grande do Sul has less balance in the summer what could adversely affect agricultural productivity in this period. The analysis result allowed the recognition of six zones with homogeneous water availability in southern Brazil. In the Northwest of Paraná there is small difference between precipitation and evapotranspiration in the winter, while in the southern half of Rio Grande do Sul there is small difference in the summer what can adversely affect agricultural productivity in this period. In other regions, the balances have intermediate values. There are regions with excess of water, among which stands out the coast and southwest do Paraná, west of Santa Catarina and north-west of Rio Grande do Sul. The water surplus in these region can help raise productivity of most crops, but favor the appearance of pests and diseases and impair the quality of grain and harvest.
关键词：riscos climáticos;zonas homogêneas;balanço hídrico
其他关键词：climatic risks; homogeneous zones; hydric balance.