In last 25 year, when tide, Semarang coast area have higher flood frequency because of sea water level advance. Flood or called tidal flood to overflow some area that lower then sea level when its have maximum tide (HHWL). Tidal flood is common for Semarang society, its as common as when saw the river flow to the beginning of river and not to down stream. Many opinions about that tidal flood cause. One of them because sea level rise, as a consequence from global warming. But there was another factor. Land subsidence has a contribution in tidal flood too.
The research was done on Augustus 2005 until Febuari 2006 at Semarang Coastal area. There was ground check to collect extend of inundate area by tidal flood. This research aim are to predict some area that overflow by sea level rise until 2015 and prediction to anxious tidal flood area until 2015 caused by sea level rise and land subsidence also spatial analysis for some anxious inundate settlement.
This research used case study method. Case study is a deeper research to some case that carries on a time and condition and we can not generalize the result to the difference places. We used descriptive methods to analyze the result. This method is only describing some condition without take a general inference. This research used Digital Elevation Model (DEM) approximation. Furthermore gave a formula to this model with a scenario to the anxious tidal flood until 2015 caused by sea level rise and land subsidence.
In 2015 according to scenario I (sea level rise) with the highest tide 277.84 cm, tidal flood inundate width will be as large as 6662.634 ha. And it will be as width as 8527.78 ha in 2015 caused by scenario II (sea level rise and land subsidence) with the highest tide 277.84 cm and land subsidence rapid as big as 14.7 cm/years. Based on scenario I, inundate settlement will be as width as 2360.629 ha and it can be 3292.152 ha inundate settlement based on scenario II.
Keywords: Spatial Analysis, Anxious Tidal Flood, Semarang
Author: Dwi Ari Wibowo
Advisors: Baskoro Rochaddi and Sugeng Widada
The research was done on Augustus 2005 until Febuari 2006 at Semarang Coastal area. There was ground check to collect extend of inundate area by tidal flood. This research aim are to predict some area that overflow by sea level rise until 2015 and prediction to anxious tidal flood area until 2015 caused by sea level rise and land subsidence also spatial analysis for some anxious inundate settlement.
This research used case study method. Case study is a deeper research to some case that carries on a time and condition and we can not generalize the result to the difference places. We used descriptive methods to analyze the result. This method is only describing some condition without take a general inference. This research used Digital Elevation Model (DEM) approximation. Furthermore gave a formula to this model with a scenario to the anxious tidal flood until 2015 caused by sea level rise and land subsidence.
In 2015 according to scenario I (sea level rise) with the highest tide 277.84 cm, tidal flood inundate width will be as large as 6662.634 ha. And it will be as width as 8527.78 ha in 2015 caused by scenario II (sea level rise and land subsidence) with the highest tide 277.84 cm and land subsidence rapid as big as 14.7 cm/years. Based on scenario I, inundate settlement will be as width as 2360.629 ha and it can be 3292.152 ha inundate settlement based on scenario II.
Keywords: Spatial Analysis, Anxious Tidal Flood, Semarang
Author: Dwi Ari Wibowo
Advisors: Baskoro Rochaddi and Sugeng Widada
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