ESTIMASI DAYA SERAP POHON TERHADAP EMISI KARBONDIOKSIDA (CO2) PADA WAKTU PUNCAK LALU LINTAS DI JALAN MALIOBORO HINGGA JALAN JENDERAL AHMAD YANI YOGYAKARTA

The purposes of this research are : 1) To estimate the levels of carbondioxide which produced by the transportation at peak traffic time 8.00-9.00 am, 1.00-2.00 pm and 4.00 - 5.00 pm in Malioboro to Jenderal Ahmad Yani street, 2) To estimate how much carbondioxide can be absorbed by the trees in Malioboro to Jenderal Ahmad Yani, 3) To determine how to reduce carbondioxide emissions in Malioboro to Jenderal Ahmad Yani street. The data used in this research include : the data of motor vehicles, the data of trees type, and the data gathered from interview. This research is conducted by field survey method and non experimental research method to calculate the carbondioxide. Nondestructive method is used to calculate the capacity of trees absorption. Meanwhile, the technical implementation unit Malioboro interview was conducted using semi-structured interview method. The data then analyzed using descriptive analysis. The results showed that carbondioxide emissions produced by motor vehicles is 385 kgCO2/hour in the morning, 499 kgCO2/hour in the noon and 565 kgCO2/hour in the afternoon. Carbondioxide emission which can be absorbed by the trees along Malioboro to Jenderal Ahmad Yani street is about 42.677 kgCO2 trees in a lifetime. Thus, large portion of carbondioxide emission cannot be absorbed. This result reflects that the presence of trees in Malioboro is not yet effective. To overcome this, technical implementation unit Malioboro made efforts in reducing the carbondioxide emission in Malioboro to Jenderal Ahmad Yani street, which are : conducting transportation engineer, protecting the trees, and giving a social socialization to the society about Malioboro area�s plans