Djati Mardiatno
Faculty of Geography, Gadjah Mada University
Nurul Khakhim
Faculty of Geography, Gadjah Mada University
Abstract
The coastal environment can change naturally or be influenced by human economic activities upstream and downstream. Purworejo Regency, Central Java, is a developing area with vaname shrimp as a mainstay of the coastal community's economy and tourism activities. Various anthropogenic factors and high sea waves in coastal areas make this area vulnerable to changes in shoreline and land cover. The shoreline in this study 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.
