Evaluation of groundwater quality and monitoring system design using GIS : lower Mae-Klong basin, Thailand | |
| Author | Dutta, Dushmanta |
| Call Number | AIT Thesis no. WA-94-11 |
| Subject(s) | Water, Underground--Thailand--Mae Klong Basin--Quality Geographic information systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The emerging problem of contamination of groundwater resources in Mae-Klong Basin has created needs for evaluation of groundwater quality status and a properly designed groundwater monitoring system to supply adequate and timely information. This study was carried out to design a best suited groundwater monitoring system for a selected portion of lower Mae-klong basin, having an area of 3,249.5 sq.km, based on the evaluated groundwater quality status and DRASTIC Index. The effective design of monitoring system depends upon an understanding of the general statistical characteristics of groundwater quality variables. In order to provide some background information on these characteristics, a statistical analysis of existing groundwater quality data were conducted using Geostatistical approach. Groundwater quality status of the study area was evaluated by using Geochemical analysis and overlaying analysis of generated groundwater quality maps from the kriged estimated values of quality variables. A Factor Combination Model of GIS was established to design groundwater monitoring network for the study area by using DRASTIC Index, groundwater quality status of the study area and possible surface sources of contamination. Minimization of costs of construction and reduction of mean laiging standard deviations were considered as major criteria for selection of the best network system among the designed alternatives by using multi criteria decision making. From the Geochemical analysis and overlaying analysis, it was found that existing minerals in the soil matrix acted as source of contamination of some groundwater quality parameters. The other sources of contamination are industrial wastes in the lowland area of densely growing industries and percolated irrigation water in agricultural field, which covers major portion of the study area. Groundwater quality maps show the severe contamination of groundwater quality of entire study area by iron and bicarbonate. After careful consideration of twelve designed alternatives in the multi criteria analysis one design came as the best alternative and it was recommended for field application. |
| Year | 1994 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Gupta, Ashim Das |
| Examination Committee(s) | Vachi Ramnarong ;Onta, Pushpa Raj ;Liang, Sherng |
| Scholarship Donor(s) | Sinotech Engg. Consultants Inc., Taiwan. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |