廊坊市区地下水质量现状评价与分析
Groundwater quality assessment and analysis in Langfang City
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摘要: 为阐明人类活动影响下廊坊市区地下水环境状况，2015年在研究区进行现场调查采集并分析了深浅层（包含3组地表水）水样50组，测试指标包括有机指标（30项）和无机指标（31项）.利用基于分类指标的单指标综合评价法进行本区地下水质量评价.结果表明，研究区地下水质量综合评价结果较差，深层地下水相比浅层地下水水质较好；从分类指标来看，对区域地下水质量影响最大的为无机毒理指标，其次为一般化学指标，毒性（类）金属指标及有机指标对地下水质量影响很小，各项指标主要影响浅层地下水；单项组分分析表明，深、浅层地下水水质贡献指标相差较大，其中影响浅层地下水水质的主要指标有总硬度、"三氮"、砷、氟化物、铁锰等，深层地下水影响指标主要为氟化物（50.0%），其次为砷（13.6%）；有机组分少量指标检出但无超标.分析认为原生水文地质环境和人类活动是影响该区地下水质量的主要因素，是导致地下水中污染组分异常的根源.Abstract: In order to investigate the groundwater quality in Langfang urban area under the influence of human activities, a field survey was conducted and 50 groups of water samples, including 3 groups of surface water, were collected and analyzed in 2015. In this study, 30 organic and 31inorganic components were analyzed. Comprehensive evaluation menthods of groundwater quality index classification was applied to assess the quality of water. The results showed that groundwater quality was poor in the study area. And the quality of deep groundwater was better than that of the shallow groundwater. Classification index analysis suggested that the most important influence on the groundwater quality was inorganic toxicological indices, followed by general chemical indexes. Toxic metal indexes and organic indexes had little influence on groundwater quality, and indices mainly affected shallow groundwater quality. However, single water quality assessment suggested that the affecting indices of water quality were greatly different between deep and shallow groundwater. The main indices affecting the shallow groundwater quality were total hardness, "three nitrogen", arsenic, fluoride, iron and manganese, etc. The main influencing factor of deep groundwater was fluoride (50%), followed by arsenic (13.6%). A small amount of organic components were detected without exceeding the standard line. It was conclueled that the primary hydrogeological environment and human activities were the main factors leading to the detection and exceeding-standard phenomenon of the groundwater quality.
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Key words:
- groundwater environment /
- quality assessment /
- index classification /
- Langfang City
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