Impact of geochemical stressors on shallow groundwater quality

被引:12
作者
An, YJ
Kampbell, DH
Jeong, SW
Jewell, KP
Masoner, JR
机构
[1] Konkuk Univ, Dept Environm Sci, Seoul 143701, South Korea
[2] US EPA, Off Res & Dev, Natl Risk Management Res Lab, Ada, OK 74820 USA
[3] Kunsan Natl Univ, Dept Environm Engn, Kunsan 573701, South Korea
[4] US Geol Survey, Water Resources Div, Oklahoma City, OK 73116 USA
关键词
D O I
10.1016/j.scitotenv.2004.12.072
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Groundwater monitoring wells (about 70 wells) were extensively installed in 28 sites surrounding Lake Texoma, located on the border of Oklahoma and Texas, to assess the impact of geochemical stressors to shallow groundwater quality. The monitoring wells were classified into three groups (residential area, agricultural area, and oil field area) depending on their land uses. During a 2-year period from 1999 to 2001 the monitoring wells were sampled every 3 months on a seasonal basis. Water quality assay consisted of 25 parameters including field parameters, nutrients, major ions, and trace elements. Occurrence and level of inorganics in groundwater samples were related to the land use and temporal change. Groundwater of the agricultural area showed lower levels of ferrous iron and nitrate than the residential area. The summer season data revealed more distinct differences in inorganic profiles of the two land use groundwater samples. There is a possible trend that nitrate concentrations in groundwater increased as the proportions of cultivated area increased. Water-soluble ferrous iron occurred primarily in water samples with a low dissolved oxygen concentration and/or a negative redox potential. The presence of brine waste in shallow groundwater was detected by chloride and conductivity in oil field area. Dissolved trace metals and volatile organic carbons were not in a form of concentration to be stressors. This study showed that the quality of shallow ground water could be related to regional geochemical stressors surrounding the take. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:257 / 266
页数:10
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