Near real time air pollution monitoring in urban environment using internet GIS | |
| Author | Ornprapa Pummakarnchana |
| Call Number | AIT Diss. no.RS-06-3 |
| Subject(s) | Air--Pollution--Thailand--Bangkok Urban ecology--Thailand--Bangkok Geographic information systems--Thailand--Bangkok |
| Note | A dissertation submitted in prutial fulfillment of the requirements for the degree of Doctor of Technical Science |
| Publisher | Asian Institute of Technology |
| Abstract | Air pollution is a serious problem in densely populated and industrialized areas in Thailand, especially in Bangkok. The air pollution in Bangkok is seriously critical, particularly in areas where pollution sources and the human population are concentrated. Economic growth and industrialization are proceeding at a rapid pace, accompanied by increasing emissions of air polluting sources. The development of a suitable and low cost method for monitoring the pollution causing sources has not followed at the same pace. Consequently, it is important that the current real-time air quality monitoring system, monitored by the PCD, should be adapted or extended to aid in alleviating this problem. In laboratory, computer based simulations between air pollutant concentration in 0-7.50 part per million (ppm) range, obtained from W03 semiconducting gas sensor, and Internet GIS were integrated so as to test the Air Quality Monitoring System (AQMS) and contribute as an easy portable device for real-time air quality monitoring as well as it can initiate other researchers in different fields of applications. Due to cost consuming to retrieve satellite imagery, the central parts of Bangkok were chosen to illustrate the air quality levels. The satellite image from IKONOS, contributed by the Department of City Planning (2005), was included to the air quality monitoring map sever and overlaid with GIS base maps. The air pollutants, which were monitored, include NO2, 03, CO, and PMto, uploaded in real time to the AQM server as concentration levels using data logging technique. The current and daily historical AQ data were captured through the modem of telephone line using Hyper Terminal program and the data were kept in the map server. Users can simply browse and view the graphical data. Sampling time of each day comprises rush hours in the early morning and in the evening, Additionally, other sampling time was also carried out when the traffic flow is normal, so as to compare the air quality levels between crowded and less crowded traffic conditions. In this connection an Internet GIS based system has been developed and implemented which will then be used for acquiring and monitoring real-time air quality levels and also updating information through wireless GIS using Web Map Service (WMS). The information of the air quality levels will be demonstrated in the form of GIS database. The air pollutant concentration levels are categorized into 3 classes including low, moderate and high related to the National Ambient Air Quality Standard (NAAQS) of the PCD. This illustration, therefore, can be used to enhance public awareness and participation and data dissemination. After all this simulation can be referred to as an air pollution monitoring system, which will be able to support the PCD to establish priorities and measures air pollution and also facilitate the problem analyzing and monitoring air pollution in Bangkok area. This study will contribute the results which are relevant information to support policy decision makers to identify issues regarding air pollution monitoring. The characteristics of sensor response to different gases will be discussed in detail as well as a summary of the advantages and disadvantages of using this portable device |
| Year | 2006 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Remote Sensing (RS) |
| Chairperson(s) | Tripathi, Nitin Kumar |
| Examination Committee(s) | Souris, Marc;Nguyen Thi Kim Oanh;Patcharawadee Suwanathada;Vaseashta, Ashok K |
| Scholarship Donor(s) | The Ministry of University Affairs |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2006 |