Hydro-geothermal characterization of Ping Khong Hot Spring, Chiang Mai, Thailand by using geoelectrical methods: laboratory experiment and field investigation | |
| Author | Nartmongkhol Songserm |
| Call Number | AIT Thesis no.GE-21-07 |
| Subject(s) | Electric prospecting--Thailand--Chiang Mai Geothermal engineering--Thailand--Chiang Mai Hot springs--Thailand--Chiang Mai |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Geotechnical and Earth Resources Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | The electrical resistivity method is one of the popular geophysical techniques used in geothermal explorations. The thermal water circulation zone was commonly interpreted from low resistivity anomalies. However, those anomalies can come from any other factors, such as normal-water aquifers, clay-bearing units, or pyrite-bearing formations. In the area where the thermal water plume did not extensively distribute, the normalized chargeability can help us to solve the ambiguous interpretation. An experimental sandbox model of the simplified thermal aquifer was conducted to observe how the water temperature affects the geoelectrical parameters (e.g., resistivity and normalized chargeability). The result of the sandbox model revealed that the normalized chargeability, as well as resistivity, were significantly changed with water temperature. Furthermore, the geoelectrical field survey was also performed, including ERT and IP at Ping Khong hot spring. The field results indicated that the thermal water aquifers tend to match with moderately high values of normalized anomalies rather than extremely high values well. The cutting lithology of the existing wells also indicated that the pyrite-bearing formations have a considerable influence on the results of inverted ERT and IP sections. In addition, the well-logging data, seismic refraction tomography, and FDEM survey also supported that thermal water came from the deeper depth and was upwelling along the fracture zones. This research tries to emphasize that the normalized chargeability can clearly delineate the thermal water plume. Moreover, the anomalies of this parameter should be a prime target rather than resistivity in thermal water-seeking projects. |
| Year | 2022 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Avirut Puttiwongrak |
| Examination Committee(s) | Ladda Tangwattananukul;Chao, Kuo Chieh |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2022 |