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005			20260817162851.0
008			060130s2005 th uu|m rtt 0| a1eng d
035			_a.b1197946x
099		9	_aAIT Thesis no.WM-04-09
100	1		_aMariappan, Arasananth
245	1	0	_aApplication of drastic methodology for vulnerability assessment of Chiang Mai-Lamphun Basin, Thailand
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2005
300			_a118 leaves : _bill.
490	1		_aThesis ; _vno. WM-04-09
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2005
520			_aProtection 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.
650		0	_aWater _xPollution potential _zThailand
650		0	_aGroundwater _xPollution _zThailand
650		0	_aGroundwater _zThailand _xQuality
700	1		_aGupta, Ashim Das, _eChairperson
700	1		_aBabel, Mukand Singh, _eChairperson
700	1		_aPham, Huy Giao, _eExamination Committee
700	1		_aClemente, Roberto S., _eExamination Committee
710	2		_aAsian Institute of Technology Fellowship, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WM-04-09
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B10531
907			_a.b1197946x _bmnait _cu
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