POTENTIALS OF GREEN OPEN SPACES IN AIR QUALITY CONTROL OF SEMARANG CITY, INDONESIADEWI LIESNOOR SETYOWATI, PUJI HARDATI, EKO HANDOYO, MUHAMMAD AMIN, NASIR NAYAN AND MOHMADISA HASHIM
The development of Semarang City has an impact on reducing Green Open Space (GOS), decreasing air quality, only having 70 days which is categorized as quite good. The purpose of the study was to evaluate the distribution of GOS and determine the potential need for GOS for air quality control. The method applied is image interpretation to identify the area of GOS, measure air quality conditions at 5 locations in the city of Semarang, calculate the potential of GOS and analyze the need for green open space to reduce air pollution. The area GOS of Semarang City (covering 5 sub-districts) is only 21.6% or 1,109.8 hectares. Central Semarang District has the lowest carbon dioxide (CO2) absorption capacity: only 12% GOS or 14,705 kg/day equivalent to CO2 emitted by 15,318 people (20.65% of the population). As a result, GOS in Central Semarang supplied the smallest amount of oxygen (O2), approximately 18,381.6 kg/day which could be inhaled as many as 14,705 people (19.83% of the population in Central Semarang District). Overall, the city of Semarang is only able to produce O2 of 375,067.2 kg/day. Increasing the plant area in the GOS to 30%, the amount of CO2 absorbed will increase to 59.4% and O2 can be available for 57.02% of the total population in the coastal area of Semarang City.