Land Subsidence Affects Coastal Zone Vulnerability
Abstract: Vast development of
urban cities in coastal area has caused rapid degradation of the environment.
Coastal zone vulnerability is mainly influenced by sea level rise, land
subsidence, storm surge, sediment transport, socio-economic and coastal
management policies. Present study investigates the main factor influences
coastal vulnerability of developing coastal urban city at north coast of Java.
Two factors were observed in the study; firstly land subsidence was observed by
geodetic and leveling methods. Secondly, tidal inundation was measured by field
work and participatory mapping. Tidal inundation model was performed using
spatial model. Physical vulnerability model was conducted by scoring and
weighting. The results show that Average rate of land subsidence between
2003-2014 is -0,021 (0,0-0,091) m.yr-1. Tidal inundation in 2014 covering 1286.29
hectares, where the highest impact happened at brackish water pond (969.63 ha).
Tidal inundation prediction on 2031 will inundate 1786.76 ha, which the
largest tidal inundation is in the residential area (646.85 ha). Coastal zone
vulnerability in the research areas predominantly was influenced by land
subsidence, and classified in moderate vulnerable. Land subsidence happened due
to most of research areas are consists of alluvial plains morphology units that
are still in consolidation process. Land subsidence conditions strongly
influence the extent of tidal inundation in the future.
Author: Pra Luber Agung
Wibowo, Agus Hartoko, Ambariyanto
Journal Code: jpperikanangg150014
