Study of hydrogeochemistry and groundwater flow in Thachin-Mae Klong basin for groundwater quality management
1
Issued Date
2012
Copyright Date
2012
Resource Type
Language
eng
File Type
application/pdf
No. of Pages/File Size
xi, 162 leaves : ill. (some col.)
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Mahidol University
Bibliographic Citation
Thesis (M.Sc. (Technology of Environmental Management))--Mahidol University, 2012
Suggested Citation
Banjong Promchan Study of hydrogeochemistry and groundwater flow in Thachin-Mae Klong basin for groundwater quality management. Thesis (M.Sc. (Technology of Environmental Management))--Mahidol University, 2012. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/95006
Title
Study of hydrogeochemistry and groundwater flow in Thachin-Mae Klong basin for groundwater quality management
Alternative Title(s)
การศึกษาอุทกธรณีเคมีและการไหลของน้ำบาดาลบริเวณแอ่งท่าจีน-แม่กลอง เพื่อการจัดการคุณภาพน้ำบาดาล
Author(s)
Abstract
The Department of Groundwater Resources has studied and collected a large number of groundwater samples in Tha Chin-Mae Klong Basin to analyze their chemical composition. However, most data are in numerical and table forms representing various parameters which lead to a difficulty for perception and utilization. Thus, this study aimed to obtain hydrogeochemical characteristics of each aquifer by analyzing and interpreting such data. A computer program was employed to conduct Piper diagram, Durov diagram, Stiff diagram, X-Y scatter plot (ion ratio analysis), and Wilcox diagram (Sodium Adsorption Ratio analysis) in order to comprehend the hydrogeochemical characteristics and groundwater evolution. According to the study, it can be concluded that there are four main groups of groundwater including: 1) Ca- HCO3, Ca-Na-HCO3 and Na-HCO3 group which is common in young-age groundwater, high terrain or recharge area, i.e. the western area from Ratchaburi to Chainat and some parts of the centre, 2) Ca-HCO3-Cl, Na-HCO3-Cl and Ca-Na-HCO3-Cl group which is found in groundwater that has migrated far from the recharge area. It is generally freshwater but brackish to salt water in some areas. 3) Ca-Na-Cl, Ca-Cl and Na-Cl group which is found in groundwater with a great distance migration in discharge area such as the southern part of the study area, and 4) SO4 group which is distributed in certain areas, particularly Phra Pradaeng aquifer, assumed to be a result of seawater contamination, dissolution of sulfate or sulfide minerals, or human activities. According to the hydrochemical analysis along the groundwater flow path from West to East, Na+ is primarily a product of Plagioclase weathering. Ca2+ and Mg2+ are products of carbonate minerals' dissolution. There is also mixing of groundwater, ion exchange, and alteration of water types as follows: - Recharge area (West of Lao Khwan) => Discharge area (West of Chao Phraya Basin): Rainwater => Ca-HCO3 => Na-Ca-HCO3 => Ca-Na-HCO3 => Ca-Na-Mg-HCO3 => Ca-Na-Mg-HCO3-Cl-SO4. - Recharge area (Tha Maka) => Discharge area (Sai Noi, Pathum Thani): Rainwater Ca- HCO3 => Ca-Mg-HCO3 => Ca-Mg-Na-HCO3=> Na-HCO3-Cl=>Ca-Na-Mg-Cl. The following three areas of categorized groundwater types were delineated for groundwater quality management: (i) where groundwater quality is high to very high (mostly groundwater types in Group 1). Preventive measures are required for these areas, (ii) where groundwater quality is moderate to high (mostly groundwater types in Group 2). There should be measures taken for groundwater quality monitoring and (iii) in contaminated areas (mostly groundwater types in groups 3 and 4). Remediation measures and groundwater utilization control are necessary. Groundwater quality for agriculture mostly is proper to average, except in the coastal area.
Description
Technology of Environmental Management (Mahidol University 2012)
Degree Name
Master of Science
Degree Level
Master's degree
Degree Department
Faculty of Environment and Resource Studies
Degree Discipline
Technology of Environmental Management
Degree Grantor(s)
Mahidol University