Abstract
Wulan Delta in Central Java has been experiencd coastal morphodynamics due to interface between Wulan River’s sedimentation and Java sea’s oceanographic process. This paper aims to analyze Wulan Delta’s morphodynamics as well as its impacts on the socio-economic condition of the community. The morphodynamics is interpreted visually and digitally using a maximum livelihood analysis of multiscale and multi-temporal images. The socio-economic impact is defined by field observations and in-depth interviews to the community and stakeholders. Analysis during the period of 1931-2010 showed that Wulan Delta had been changed morphologically from straight with small arc-like (arcuate) to bird-foot (digitate) with a plausible change into rounded (lobate) in the future, which represented dominant sedimentation by oceanographic rather than fluvial processes. Land expansion in Wulan Delta led to landuse change in Wedung, i.e. expansion of settlement area to 167 ha and fish pond area to 1014 ha in 2000-2010. Most settlements in the area, which are built linearly to river levees, own a high vulnerability to both river flood and tidal inundation. Therefore, dissemination about knowledge of the disaster and coastal zone management, as a means of increasing awareness, becomes necessary in integrating the coastal management in Wulan Delta together with improvement in infrastructure and proper regional development. The proper development strategy for the coastal village is aggressive maintenance strategy, including public infrastructure revitalization, quality improvement for human resources, and silvofishery system. Law enforcement on coastal zoning regulations is necessary to achieve an integrated and sustainable coastal zone management.
Highlights
Indonesia was an archipelago with 99.093 km shoreline length [1]
The land-induced, for instance, fluvial processes involving water and sediment transports from hinterland to the ocean plausibly affect coastal geomorphology, i.e. morphology and sediment constituent [5]
This paper aims to analyze the morphodynamics of Wulan Delta using multi-temporal remote sensing images and to analyze its impacts on the socio-economic condition of the local community
Summary
A shoreline is a highly dynamic land-sea interface due to the influence of tides, waves, sedimentation processes, and human activities. A shore is part of a coastal area located between the highest and the lowest tides [2], whose seaward border is a wave breaker zone and landward border is the outer boundary of coastal alluvial plain [3]. It displays a highly dynamic area with variously complex land uses [4] [5]. Coastal area constantly experiences an adjustment process to a point of natural equilibrium due to the impact of sea and land activities, i.e. either natural or man-induced [17]
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