An Improve Performance of Geospatial Model to Access the Tidal Flood Impact on Land Use by Evaluating Sea Level Rise and Land Subsidence Parameters

Abstract

In the 20 th century, climate change caused an increase in temperature that accelerated the rate of sea level. Sea level rise and land subsidence threaten densely populated coastal areas as well as lowlands because they cause tidal flooding. Tidal floods occur every year due to an increase in sea level rise and land subsidence. The lack of information on this phenomenon causes delays in disaster mitigation, leading to serious problems. This study was conducted to predict the area of tidal flood inundation on land use in 2020 to 2035. This research was performed in Pekalongan Regency, as one of the areas experiencing large land subsidence and sea level rise. The research data to be used were tides and the value of soil subsidence, as well as sea level rise. Digital Terrain Model (DTM) was obtained through a topographic survey. Modeling was used for DTM reconstruction based on land subsidence and sea level rise every year. The sea level rise value uses the satellite altimetry data from 1993-2018. A field survey was conducted to validate the inundation model that has been created. Land subsidence was processed using Sentinel-1 Synthetic Aperture Radar (SAR) image data with Single Band Algorithm (SBA) differential interferometry. This study proved that tidal flooding has increased every year where in 2020 it was 783.99 hectares, but with the embankment there was a reduction in inundation area of 1.68 hectares. The predicted area of tidal flood inundation in 2025, 2030 and 2035 without the embankment is 3388.98 hectares, 6523.19 hectares, 7578.94 hectares, while with the embankment in 2035 is 1686.62 hectares. The research results showed that the use of embankments is a solution for coastal mitigation as well as regional planning.

Health Impacts of the 2023 Flood in Pakistan: A Comprehensive Case Study on Skin-related Ailments and Waterborne Diseases

“…Climate change adaptation strategies must be woven into disaster response plans to address the escalating frequency and intensity of floods [10]. Integrating climate resilience measures can enhance the effectiveness of disaster preparedness and public health interventions.…”

Instrumenting GIS as Smart City Tools to Identify the Impact of Tidal Flood Threat in the Coastal Zone of Pekalongan City

“…The latest study also identified that tidal flooding had enlarged yearly. In 2020 alone, the tidal flood coverage area was 783.99 hectares [4], while other research asserted that tidal floods had affected 50% of Pekalongan city [3].…”

Analysis of Stability Safety Factors of Gabion Weir Models against the Wall and Water Level Variation

“…The latest global catastrophe is caused by climate change and global warming. The rise in sea level, which causes floods and tidal floods, is one of the effects of climate change that is readily apparent [3] [4]. The flood discharge, water channel hydraulics, water reservoir volume, and the suitable pump capacity must all be determined through analysis [5].…”