Sea-level rise has influence to the increasing of Wave Set-up and Wave Run-up contained in the vertical sea wall port building on the eastern part of Semarang s west flood canal. Based on the
calculation of sea level rise average at of 8 mm year with 20 years simulation, 16 cm sea level rise would increase the Wave Set-up and Wave Run-up at 4.1 cm or 10.59 and at 7.7 cm or 1.51
respectively. In contrast, with the same assumption, there would be a decreasing in security factors FS equal to 0.37 cm or 18.45.
If it is calculated over the next 100 years when there is 80 cm sea level rise, Wave Set-up and Wave Run-up will rise by 10 cm or 51.73 and at 1.6 m or 31.64 respectively, while safety factors will at
1.16 m or 57.67. This means that the higher its SLR the greater both wave set-up and run-up, but the lower its safety factor DKP, 2008.
2.2.7. Functional Areas of Central Business District
The condition of seawater inundation in Semarang City has reached an alarming stage. Besides as the impact of sea level rise, such condition is exacerbated by land subsidence. The inundation
infiltrate into the mainland through urban drainage networks, which their conditions are unfavorable. The impact caused by seawater inundation is very broad such as: disruption of
industrial activities and regional markets. Inundation in Semarang City and its impact to functional areas of central business district can be seen in Figure 2.19..
2.2.8. Industrial Areas
In the northern areas of Semarang city there are a number of industrial areas, particularly in District Genuk and District Tugu. Based on projections of sea level rise, the industrial area will be flooded.
These industries consist of various kinds, ranging from household industries, small industries, to large industrial companies. If these industrial areas flooded so it would result in some impacts, including
Setiadi and Kunarso, 2009: 1 existing production activities will inhibited, 2 import-export activities will be disrupted, 3 coastal areas are not attractive anymore as an interesting location for
investment , 4 reduced demand for labor in the industrial sector, and 5 regional income declining. The industrial area that will be flooded approximately 108.2 Ha. Threatened industrial areas in the
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northern part of Semarang due to rising sea levels also has an impact on livelihoods, especially those who are working as laborers. In addition, the number of workers as industrial workers in the area will
be around 65,737 inhabitants. They are people who are vulnerable to loss their source of income when their livelihood collapsed. In the long-run, this might decrease the city economic performance
and reduce the quality of life.
Figure 2.19: Semarangs Functional Areas which Threatened by Climate Change
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Figure 2.20: Semarang s Old Town which are Threatened as a Result of Climate Change
2.3. Vulnerable Groups
