Pengaruh Jumlah Kendaraan Dan Faktor Meteorologi Terhadap Konsentrasi Karbon Monoksida (Co) Di Jalan Gajahmada Kawasan Simpanglima Kota Semarang

Simpang Lima area is the heart of Semarang which has five main road Jl . Gajah Mada , Jl . Pandanaran , Jl . Ahmad Yani , Jl . Heroes and Jl . K.A Dahlan . Jl . Perpendicular to Gajah Mada Jl . Pandanaran and Jl . Ahmad Yani cause differences in the movement direction of the wind that affects the concentration of CO at Jl . Gajah Mada as a control to indicate the condition of the street canyon . Another factor that affects the concentration of CO is the number of vehicles , temperature , humidity , wind direction and speed . The method of research is done by taking a sample directly in Gajah Mada street during rush hour vehicle for 6 days at points AG1, AG2, BG1 and CG1. Distance of each sampling point is 75 meters . Based on the results of the study , the concentration of CO in Gajah Mada street at 7:00 a.m. to 8:00 a.m. on value ranges 5-11 ppm , at 1:00 p.m. to 14:00 range in grades 6-13 ppm , and 16:00 to 17:00 at the value range 14-21 ppm . The final conclusion is directly proportional to the number of vehicle CO concentration is high when the number of vehicles will increase the concentration of CO , while the temperature , humidity and wind speed is inversely proportional to the concentration of CO means that when the temperature , humidity and wind speed is low, the concentration of CO will increase while the wind perpendicular to the southeast on Jl . Gajah Mada increasing the concentration of CO than the wind heading south parallel to the roa