RGCI n609 - Coastal Environmental Dynamics in Purworejo Regency, Central Java, Indonesia

Revista de Gestão Costeira Integrada
Volume 25, Issue 1, June 2025, Pages 21-30

DOI: 10.5894/rgci-n609
* Submission: 12 OCT 2024; Peer review: 14 OCT 2024; Revised: 17 NOV 2025; Accepted: 17 NOV 2025; Available on-line: 10 DEC 2025

Coastal Environmental Dynamics in Purworejo Regency, Central Java, Indonesia

M.N. Airawati^{@ 1} , Djati Mardiatno² , Nurul Khakhim²

^@ Corresponding author: mari016@brin.go.id

¹ National Research and Innovation Agency - Indonesia.

² Faculty of Geography, Gadjah Mada University.

ABSTRACT

The coastal environment can change naturally or be influenced by human economic activities. Purworejo Regency, in Central Java, is a developing area being the vaname shrimp main activity of the coastal community’s economy. Various anthropogenic factors and high sea waves in coastal areas make this area vulnerable to changes in shoreline and land cover. In this study, the shoreline was extracted from SPOT time series spatial data (2007, 2011, 2017, and 2020) using the on-screen digitization method, while land cover changes were analyzed using the overlay method. The most significant sedimentation increase occurred from 2011 to 2017 with an additional area of 29.67 ha, while the smallest sedimentation occurred from 2017 to 2020 with an additional area of 9.09 ha. The worst erosion was detected from 2017 to 2020, which caused the loss of an area of 17.52 ha. The type of land cover that is developing rapidly in Purworejo Regency is shrimp ponds, which have been widely developed since 2014. Cross-profile analysis concluded that there was no link between changes in shoreline and changes in land cover.

Keywords: shoreline, land cover, dynamic, shrimp pond, Purworejo.

RESUMO
O ambiente costeiro pode sofrer alterações de forma natural ou ser influenciado por atividades económicas de origem antropogénica. A região de Purworejo, localizada em Java Central, encontra-se em processo de desenvolvimento, sendo a aquicultura de camarão vannamei (Litopenaeus vannamei) o principal vetor económico das comunidades costeiras. A ação combinada de diversos fatores antropogénicos, associada à forte agitação marítima nas zonas costeiras, confere a esta região uma elevada vulnerabilidade a alterações na linha de costa e na cobertura do solo. Neste estudo, a linha de costa foi extraída a partir de dados espaciais de séries temporais do satélite SPOT (2007, 2011, 2017 e 2020), por meio do método de digitalização em ecrã. As alterações na cobertura do solo foram analisadas utilizando o método de sobreposição de dados geoespaciais. O incremento mais expressivo de sedimentação foi registado entre 2011 e 2017, com um acréscimo de 29,67 hectares, enquanto o menor aumento ocorreu entre 2017 e 2020, com 9.09 ha adicionais. A erosão mais significativa foi observada no período de 2017 a 2020, resultando na perda de uma área de 17.52 ha. A forma de ocupação do solo que mais se tem expandido na região de Purworejo corresponde aos viveiros de camarão, amplamente desenvolvidos desde 2014. A análise de perfis transversais permitiu concluir que não existe uma correlação significativa entre as alterações na linha de costa e as modificações na cobertura do solo.

Palavras-chave: litoral, cobertura do solo, dinâmica, viveiro de camarão, Purworejo.

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Volume 25, Issue 1 - June 2025

Coastal Environmental Dynamics in Purworejo Regency, Central Java, Indonesia

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