Figure 2.8 b: Sea Water Inundation in Semarang City in the Next 100 Years with SLR Estimation at 80 cm
Source: DKP 2008
2.1.4. Wind Pattern
Study of DKP 2008 mentioned that the average distribution of wind direction in Semarang City from 1977 to 2008 was not dominated by a particular direction because the percentage wind
distribution is almost the same for wind direction mostly from the Northwest, North, East and Southeast. The wind speeds from 1980 to 2008 ranged between 1-3 m s 75.2. In addition, DKP
2008 divides the season in Semarang City into 4 seasons, namely West season, Transition season 1, East season and Transitional season 2. During the West season the domination of wind coming from
the west-northwest direction and with speeds between 1-3 msec 70. In Transition season 1, the largest direction of the wind coming from the North, East and Southeast with the average wind
speeds between 1-3 m s 70.7.
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Figure 2.8 b illustrates the projections of the
range of pressure from sea level rise to Sema-
rang City areas. The range is between 1.7
km the shortest in the north eastern part of
city and 3.2 km the furthest in the northern
of Semarang.
Figure 2.9: Data of Wind Speed in Semarang City 1994-1999 CCROM IPB, 2010
Gambar 3.2.
Source: CC-ROM, 2010: 39
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In East season, the domination of winds blow from the East and Southeast. Wind blowing to eastward is faster than the wind that comes from Southeast direction. The average wind speed is
vary between 1-3 m s 77.9. In transition season 2, the condition is almost the same with transition season 1, however the largest distribution of the wind coming from four directions namely
North West, North, East and Southeast. The range of average wind speeds at 1-3 m s 78.4. In general there are no significant changes in term of wind patterns in Semarang City, where the
domination of winds direction from the year 1977-2008 is from the East and Southeast. Besides the influence of extreme climatic events caused by climate variability between years, the
Semarang City is also influenced by extreme weather conditions, like high winds. Based on data record collected daily from the weather station and Ahmad Yani Airport in Semarang, CCROM IPB
2010 states that the extreme wind speeds tend to occur locally Figure 2.9. At the Semarang station, extreme wind speed above 60 km h 17.2 m s or 62 km h occurred on June 15, 1994,
while the highest wind speed at station Ahmad Yani Airport occurred at 5 March 1995 12.5 m s or 45 km h.
2.2. Vulnerable Areas and Its Impact
