03640nas|a2200421 a 4500 20260817162851.0 060130s2005 th uu|m rtt 0| a1eng d .b1197946x AIT Thesis no.WM-04-09 Mariappan, Arasananth Application of drastic methodology for vulnerability assessment of Chiang Mai-Lamphun Basin, Thailand Pathum Thani, Thailand : Asian Institute of Technology, 2005 118 leaves : ill. Thesis ; no. WM-04-09 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 2005 Protection and future development of groundwater resources can be planned properly and more carefully with information from vulnerability assessments of the groundwater aquifers. The groundwater is susceptible to anthropogenic contaminations from the surface and sometimes in itself contains chemical constituents which make it harmful for human use. The objective of this study was to analyzed trends of the groundwater in the study area in terms of quality and water levels and to assess the degree of vulnerability risk from anthropogenic activities. The method of analysis was preceded by data collection and analysis, where trends from of the water quality and water levels derived. Geological sections were made to understand the physical characteristics of the aquifer. Properties of the aquifer were obtained from a previous modeling study. These were then used for the DRASTIC vulnerability ad GLA effective protectiveness analysis in the GIS environment. The results of both methodologies are then compared. The trends of the groundwater quality and water levels show that in some areas, The chemical contents exceed allowable limits and also decline in groundwater levels over the period of 30 years. Fluoride has been found to be in higher concentrations (exceeding the allowable limits for drinking purposes) in the southeastern end of the Chiang Mai Lamphun basin. High nitrate levels in the groundwater shows that there is possibility of nutrient leaching from agriculture land. Iron content was also found to be above allowable thresholds for drinking purposes. The DRASTIC map shows high vulnerability in the northern and mid-eastern parts of the basin which are urban and mixed orchard areas. Water Pollution potential Thailand Groundwater Pollution Thailand Groundwater Thailand Quality Gupta, Ashim Das, Chairperson Babel, Mukand Singh, Chairperson Pham, Huy Giao, Examination Committee Clemente, Roberto S., Examination Committee Asian Institute of Technology Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. WM-04-09 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B10531 .b1197946x mnait u 240329 0 060120 m a u 0 mnait mnarc 22 40 Barcode : 30050120550263 CREATED : 2014-03-28 RECORD # : i12781691 LPATRON : 1028590 LCHKIN : 2018-08-05 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 2 TOT CHKOUT : 3 TOT RENEW : 0 Barcode : 30050120235717 CREATED : 2016-03-25 RECORD # : i12909804 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6560 6560 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.WM-04-09 30050120550263 2026-08-17 16:28:51 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.WM-04-09 30050120235717 2026-08-17 16:28:51 2026-08-17 40