Simulasi Penyebaran CO2 di Semarang Dengan Software LADM

Abstract

Simulation of CO2 dispersion has been carried out for Semarang region and its surrounding which covers area of (50 x 50) km2, in September 1998 (represent dry season), by using software of LADM that developed by CSIRO, Australia. Aerology data, except wind data, for this simulation is observed by launching radiosonde at Ahmad Yani airport area (110,4°E and 7,0°S), and this location is taken as center of the simulation. Wind data is obtained from Meteorological and Geophysics Agency. By simulating two CO2 emission sources that placed in Ungaran regent and north east of Semarang, close by bus terminal of Terboyo, it is found that the CO2 dispersion pattern tends to spread northwards and north-westwards; covering northern and north western of Semarang, Java sea and Kendal Regency.
Based on the CO2 dispersion pattern given by LADM and by considering field conditions including topography and CO2 emission sources therefore are measurements of CO2 in six sites in the same season in 1999. Jomblom bay (Kendal), Tanjung Mas harbor, and Graha Padma Settlement represent the spreaded area of CO2 (polluted area of LADM version) that borne in Semarang city. While Candi, Gubug (Grobogan) and Dan Sat Brimob complex represent the unspreaded area of CO2 (cleaned area of LADM version). Dan Sat Brimob and Tanjung Mas harbor are located closed by CO2 emission sources (road and industry). The other sites have no significant pollutant emission sources, thus the CO2 emission sources can be neglected in
the sites. Analyzing of measurement of CO2 in the sites show correlation with the dispersion of CO2 pattern of LADM.