| Author | Somhathai Wattanamongkol |
| Call Number | AIT Thesis no. EV-02-25 |
| Subject(s) | Eutrophication--Simulation methods--Thailand--Samut Prakan
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| 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-02-25 |
| Abstract | The marine eutrophication has become increasingly occurred and resulted in excessive bloom of algae causing nuisance and several impacts. Nutrient enrichment, primarily phosphates and nitrates, has a simulating effect on the development of such bloom. The Upper Gulf of Thailand is one of the affected area, which has been polluted by nutrient carried by four main rivers runoff. Due to heavily industrialized province, Samut Prakarn, The Samut Prakarn Wastewater Management project has been introduced for pollution abatement. By providing the wastewater treatment plant with the capacity of 525,000 m3 /day in the year_2015. Effluent discharge was proposed by establishing a marine outfall at 3.35 km offshore near Klong Dan. Such effluent still contained the nutrient which might be the cause of eutrophication problem. The eutrophication model was carried out to determine the effects of wastewater effluent and evaluate the alternatives of sewage treatment. This study was to validate the eutrophication model of the Upper Gulf which focused mainly on the vicinity of outfall and then applied for prediction of temporal and spatial distribution of eutrophication occurrences when the Samut Prakarn Wastewater Treatment Plant has been operated. Three scenarios of nutrient load drained at outfall have been proposed; at the designed nutrient concentrations, at 50% of designed nutrient levels and 400% designed nutrient levels which was assumed for the emergency case or untreated wastewater has been drained immediately into the Upper Gulf. The calibration for the eutrophication model was based on data of inorganic nutrients at outfall and chlorophyll-a at near shore stations. In general this model is complex and required more data from the field measurements for both initial boundaries, and nutrient loads at river mouth. Therefore, sensitivity analysis has been conducted for observed the effect of each selected parameters adjustment. This analysis has indicated that the initial concentrations and boundary conditions were important and influenced especially the coastal area. The existing inorganic nutrients at outfall were, however, in agreement with the simulation. Because of limited data on the phytoplankton component, growth rate and so on , the model results have been used in relative terms by comparing the results of different scenarios. From simulation results, the efficiency of 50% designed nutrient level has not reduced the inorganic nutrients compare to that of designed nutrient level. On the other hand, in case of 400% of designed nutrient level has resulted in higher concentration of nutrients at the outfall.. The spatial distribution has the same pattern that is at 300 meter in radius for all scenarios. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-02-25 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Preeda Parkpian |
| Examination Committee(s) | Suphat Vongvisessomjai ;Nguyen Cong Thanh |
| Scholarship Donor(s) | Pollution Control Department |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |