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Evaluation of urban forest for reducing air pollution a case study in Yogyakarta City, Indonesia

Wdagdo, Ardiyan (2012) Evaluation of urban forest for reducing air pollution a case study in Yogyakarta City, Indonesia.

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Abstract:Development of city has a tendency to minimize the green open spaces. Urban forest is sum of all woody and associated vegetation in and around dense human settlements. The Data obtained from local Government of Yogyakarta City, (Environment Agency) mention that the city of Yogyakarta only has a urban forest area 260,000 m 2 or 26 Ha (0.80%) from total area of Yogyakarta City. Urban forest is a way that can be used to reduce levels of air pollution in the city. The purpose of this research is to evaluate the effectiveness of spatial distribution of urban forest for reducing air pollution in Jogjakarta city and to make recommendations to improve development of urban forest planning in Yogyakarta City. The method use in this research to determine urban forest cover involved an estimation of the area on satellite image with Extraction information segmentation and visual interpretation. The field survey also conduct to measure structural parameters and capability air pollution removal of the Yogyakarta urban forest using UFORE methods (Urban Forest Effect Model). The results of the urban forest cover area in Yogyakarta city in 2005 is 4,447,885.94 m 2 (447.79 Ha) or 13.79% with accuracy assessment 94.11%. UFORE analysis method has results number of tree in urban forest of Yogyakarta city is 56,000 trees with 19,880 trees or 35.55% owned by city and 36,092 trees or 64.45% owned by private. The common species trees are Mangifera indica, Mimusops elengi, Pterocarpus indicus, Polyalthia longifolia and Ficus Benjamina. The overall diameter size class distribution is small and too young with 55.82 % of trees less than 15.2cm in diameter, 39.92% between 15.2 and 30 cm, and 4.26 % larger than 30 cm in diameter. The urban forest tree condition has 60.94% of trees are rated as being in excellent or good condition. Air Pollution Removal of Yogyakarta’s urban forest are 2,450.1 kg / year for CO, 7,795.9 kg / year for NO2 , 24,493.5 Kg / Year for O 3 , 20,586.0 kg / year for PM10, 1,724.4 kg / year for SO2 and total overall in the removal of air pollution amounted to 57,049.9 Kg / year. The effectiveness of air pollution removal from Yogyakarta city is moderate or medium effectiveness with percent air quality improvement 0.10%. Even though the percent air quality improvement from pollution removal by trees may be relatively small, the total effect of trees on air pollution can produce impacts that are significant enough to warrant consideration of tree cover management as a means to improve air quality. Percent air quality improvement estimates are likely conservative and can be increased through programs to increase canopy cover. The tree planting in urban forest still can be used as an effective way in alleviating the air pollution problems in Yogyakarta city. Key words: urban forest, visual interpretation, air pollution, Yogyakarta City
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
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