کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9491262 | 1630177 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regional hydrochemical study on salinization of coastal aquifers, western coastal area of South Korea
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In order to evaluate the salinization in the western coastal area of South Korea, we performed a regional hydrochemical study on a total of 356 shallow groundwaters sampled within 10Â km from the coastline. About 13, 5, and 37% of the samples exceed the drinking water standards for total dissolved solids, chloride, and nitrate, respectively, indicating significant deterioration and salinization of groundwaters. The concentrations of analyzed solutes are very wide in range, suggesting that the hydrochemistry is controlled by several intermixed processes such as seawater mixing, anthropogenic contamination, and water-rock interaction. Based on the interpretation of cumulative probability curves for Clâ and NO3â concentrations, groundwaters are grouped into four types, as follows: (1) type 1 waters (37.6%) that are relatively poor in Clâ and NO3â, which indicates little contamination due to seawater mixing and/or anthropogenic pollution; (2) type 2 waters (2.8%) enriched in Clâ, indicating considerable effects of seawater mixing; (3) NO3â-rich, type 3 waters (58.1%) which show significant anthropogenic pollution; and (4) type 4 waters (1.4%) enriched in both Clâ and NO3â, demonstrating the effects of both seawater mixing and anthropogenic contamination. The results of water-type classification are well confirmed by statistical analyses of hydrochemical data. As an effective tool for evaluating the relative degree of seawater mixing, we propose the 'Seawater Mixing Index' (SMI) based on the concentrations of Na, Mg, Cl, and SO4. Most type 2 and type 4 waters have SMI values greater than 1. At least about 5 and 60% of well groundwaters are considered to be affected by salinization due to seawater mixing and anthropogenic contamination, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 313, Issues 3â4, 10 November 2005, Pages 182-194
Journal: Journal of Hydrology - Volume 313, Issues 3â4, 10 November 2005, Pages 182-194
نویسندگان
Seh-Chang Park, Seong-Taek Yun, Gi-Tak Chae, In-Sik Yoo, Kwang-Sub Shin, Chul-Ho Heo, Sang-Kyu Lee,