Study on Flood Inundation in Pekalongan, Central Java

Abstract

Abstract. Tidal flood or 'rob' is a serious problem in many coastal areas in Indonesia, including Pekalongan in the northern coast of Java island. This study aimed to simulate the flood inundation area for different scenarios of sea level rise, also to investigate the possibility of land subsidence that may further aggravate the problem of flooding in Pekalongan. In this study, the MIKE-21 model was used to simulate and predict the flood inundation area. Tidal data were generated from the Tide Model Drive (TMD). The tidal flood simulations were carried out for three different scenarios of sea level rise: 1) current situation, 2) next 50 years, assuming no sea level rise, and 3) next 50 years, assuming 50 cm of sea level rise. Based on the results, the ranges of water level rise in Pekalongan for each scenario were 0.23-1.27 m, 0.36-1.38 m, and 0.65-1.53 m, respectively. Meanwhile, ground displacement maps were derived from the ALOS/PALSAR data using Differential Interferometric Synthetic Aperture Radar (D-InSAR) technique. Twelve level 1.0 images of ALOS/PALSAR data acquired in ascending mode during 2008 to 2009 were collected and processed in time-series analyses. In total, 11 pairs of interferogram were produced by taking the first image in 2008 as the master image. The results showed that the average of land subsidence rate in Pekalongan city was 3 cm/year, and the subsidence mainly occurred in the western part of the city.

Inclusive medical rehabilitation for persons with disability due to leprosy, lymphatic filariasis, and diabetes mellitus: Mapping the gap in three leprosy endemic districts in Indonesia

“…According to the previous findings, it could be understood that the gaps on medical rehabilitation for leprosy, DM, and LF remain exist [19,20]. In this study, the gaps are mainly illustrated on self-care management and referral system.…”

“…The condition of health facilities and infrastructure in Central Java is relatively better than in South Sumatra and West Nusa Tenggara. Nevertheless, in areas directly adjacent to the Java Sea in Pekalongan District, many are experiencing floods [19], so the PHC is inundated by sea water forcing many health workers to wear boots. Therefore, several PHCs in Pekalongan District are rebuilt, having more than one floor.…”

Analysis of the dynamics of coastal landform change based on the integration of remote sensing and gis techniques: Implications for tidal flooding impact in pekalongan, central java, Indonesia

“…Rate of subsidence is also needed for DEM modelling and in this study this rate (3 cm yr −1 ) on average ( Fig. 3) was obtained based on the research carried out by Nashrrullah et al (2013).…”

Analisis Perubahan Penggunaan Lahan di Kota Pekalongan Tahun 2003, 2009, dan 2016

“…Sebagaimana diketahui bahwa banjir rob akibat kenaikan muka air laut tidak bisa dihilangkan, akan tetapi hanya dapat direduksi dampaknya [9] termasuk dampak terhadap penggunaan lahan. Ketepatan penggunaan lahan dan manajemennya di Kota Pekalongan merupakan suatu hal yang penting dalam proses perencanaan [10] untuk meminimalisir dampak dari bencana seperti banjir rob yang diprediksikan akan terus mengalami peningkatan di setiap tahunnya [11].…”