Statistical analysis of water pollution in Bangkok klongs and the design of a water quality monitoring plan | |
| Author | Luitel, Achyut Kumar |
| Call Number | AIT Thesis no.EV-93-19 |
| Subject(s) | Water quality monitoring stations--Thailand--Bangkok Water quality--Thailand--Bangkok--Measurement |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-93-19 |
| Abstract | Water quality in the klongs of Bangkok was analyzed using statistical techniques. The data used in this study were collected from Bangkok Metropolitan Administration for years, 1990 to 1991, and two types of field surveys, high frequency observations and horizontal observations, carried out on klong Saen Saep. High variation in BOD, COD and DO were observed in the klongs. BOD and COD show discernible relationships, which show that the main pollution mechanism in the klongs is caused by organic pollutant loading. Low correlation coefficients obtained among other water quality parameters made the results inadequate for interpretation. The horizontal distribution pattern of the water quality parameters confirms higher concentration of pollutants in the inner part of the city as compared to the Chao Phraya river side and suburban area. With principal component analysis, it was possible to find out the principal factors contributing water pollution namely organic pollution, seasonal variation, clearness of water and offensive smell, respectively. Cluster analysis was performed for the major factor, which was able to reduce the total number of sampling stations thus regionalizing the water quality. It was demonstrated that the clustering technique can be used to optimize the sampling frequency as well as water quality parameters with little loss in information. For most of the cases, it was found out by Analysis of Variance that locational effects are large when sampling locations are more and seasonal effects are large when the sampling frequencies are closer. It was investigated that with the increase in the range of study area, similarity of locational fluctuation pattern is also increased. An analytical method has been proposed for the determination of optimal sampling frequency . The same method can be employed for the reduction of sampling stations also. Finally, a procedure for water quality monitoring system is proposed in order to find suitable analysis techniques for the determination of sampling site allocation, time interval, and required water quality parameters. It is recommended that, the monitoring authorities should choose an exact time interval between any two samplings, to make an effective monitoring plan for the klongs. Sampling station locations should be reorganized systematically subdividing the klong network into portions which are relatively equal in terms of the number of contributing tributary klongs. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-93-19 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Fujii, Shigeo; |
| Examination Committee(s) | Reutergardh, Lars Baetz;Bhattarai, Kiran Kumar; |
| Scholarship Donor(s) | Austria; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |