Revista Recursos Hdricos

DOI:10.5894/rh35n2-8
Este artigo foi apresentado no 12 Congresso da gua e selecionado para submisso e possvel publicao na Recursos Hdricos, tendo sido aceite pela Comisso de Editores Cientficos Associados em 30 de abril de 2014. Este artigo parte integrante da Revista Recursos Hdricos , Vol. 35, N 2, 89-97, novembro de 2014. 

Mtodos de avaliao de secas para apoio gesto de recursos hdricos

Drought assessment methods for support of water resources management

Eduardo VIVAS¹

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1 - Professor Adjunto Convidado, Instituto Superior de Engenharia do Porto, Rua Dr. Antnio Bernardino de Almeida, 431, 4200-072 Porto, Telefone: +351 22 83 40 500, Fax: +351 22 83 21 159, email: ebv@isep.ipp.pt

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RESUMO
A ocorrncia de impactos de seca muito significativos, em regies como o sul da Europa, deve-se no s s caractersticas naturais do clima, mas tambm intensificao da utilizao da gua (potenciando problemas de escassez).
Porm, a anlise dos impactos de seca dificultada pela variabilidade dos mesmos, no espao e no tempo, uma vez que cada regio apresenta caractersticas nicas de utilizaes, infraestruturas, organizao social e poltica, etc. Como tal, a gesto de secas dever ser enquadrada no mbito da anlise e gesto de risco, devidamente moldada s vulnerabilidades da regio.
Nesse contexto, apresenta-se uma anlise comparativa de alguns dos principais mtodos de avaliao de secas disponveis para apoio gesto de recursos hdricos, nomeadamente: (i) a utilizao de um ndice de seca nico, (ii) a considerao simultnea de mltiplos ndices de seca e (iii) o recurso avaliao socioeconmica de potenciais impactos de seca.

Palavras-chave: avaliao e gesto de secas, ndices de seca, ndices mltiplos, avaliao socioeconmica de impactos.

ABSTRACT
The occurrence of very significant drought effects in regions as Southern Europe is a consequence of the natural climate characteristics, but also of the intensification of water uses (potentiating water scarcity problems).
However, the assessment of drought impacts is aggravated by the temporal and spatial variability of those effects, since each region has unique characteristics of water uses, infrastructures, social and political organization, etc. Therefore, the drought management should be framed under the risk assessment and management approach, taking into account the existing regional vulnerabilities.
Thus, it is herein presented a comparative analysis of some of the main drought assessment methods available for support of water resources management, namely: (i) the assessment through a single drought index, (ii) the use of multiple drought indices and (iii) the use of the socioeconomic assessment of potential drought effects.

Keywords: drought assessment and management, drought indices, multiple indices, socioeconomic assessment of drought impacts.

 

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