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| 河北省地下水硝酸盐污染总体状况及时空变异规律 |
| Status of the Contamination and Spatial-temporal Variations of Nitrate in Groundwater of Hebei Province, China |
| 投稿时间：2013-07-09 |
| DOI： |
| 中文关键词: 河北省 地下水 硝酸盐污染 时空变异 |
| 英文关键词: Heibei Province groundwater nitrate contamination spatial-temporal variations |
| 基金项目:十二五”国家科技支撑计划(2012BAD15B02-2);农业部科技教育司资助(NYB2006-02) |
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| 中文摘要: |
| 通过对河北省11个地区连续7年共14次进行地下水取样及硝酸盐含量监测,对地下水硝酸盐污染现状及时空变异规律进行分析。结果表明,2006—2012年间河北省地下水硝酸盐(以N计)平均含量变化范围在6.73~9.84 mg·L-1之间,总平均值为8.42 mg·L-1,低于美国的饮用水标准(10 mg·L-1)。河北省地下水硝酸盐平均含量呈逐年明显增加的趋势,河北省地下水硝酸盐10、20 mg·L-1超标率分别为22.34%和9.73%,地下水硝酸盐大于20 mg·L-1的Ⅳ类和Ⅴ类水分布频率明显增加,由2006年的6.96%增加到2012年的10.60%,增加了3.63%。不同地区间地下水硝酸盐平均含量和各类水的分布频率均存在明显的差异。地下水硝酸盐含量的最低值出现在廊坊、衡水和沧州地区,平均含量分别为0.64、0.62 mg·L-1和0.97 mg·L-1。秦皇岛地区地下水硝酸盐的平均含量最高,为26.45 mg·L-1,是廊坊、衡水和沧州地区的27.27~42.66倍。秦皇岛地区地下水硝酸盐超标率也最大,为58.82%。衡水、沧州、廊坊地区主要以Ⅰ类水为主。保定、邢台、邯郸、石家庄和唐山等5个地区以Ⅰ和Ⅲ类水为主。秦皇岛、张家口和承德等地区以Ⅲ类水为主。其中,张家口和承德地区Ⅴ类水分布频率分别为15.53%和9.95%,仅次于本地区的Ⅲ类水和Ⅱ类水。 |
| 英文摘要: |
| In order to evaluate the nitrate contamination status of groundwater in Hebei Province, a largescale investigation and watersampling analysis on nitrate content in local groundwater from 11 cities was performed from 2006 to 2012, and the temporal and spatial variability of nitrate were studied. The results showed that the average nitrate content of groundwater in Hebei Province fluctuated from 6.73 mg·L-1 to 9.84 mg·L-1 during 7 years. The total average nitrate content was 8.42 mg·L-1, lower than drinking water quality criterion of the United States. The average nitrate content of underground water had an obvious increasing trend. About 22.34%samples exceeded the criterion of drinking water quality of the United States. Only about 9.73%samples exceeded the criterion of national drinking water quality. The distribution frequency of Ⅳ and ⅴ water(the samples that nitrate content was less than 20 mg·L-1)increased significantly, from 6.96%in 2006 to 10.60%in 2012, with an average increasing of 3.63%. The average content and distribution frequency of various types water had significant difference among the 11 regions. The lowest value of nitrate concentration in groundwater appeared in Langfang, Hengshui and Cangzhou regions. The highest nitrate concentration in groundwater samples was observed in Qinhuangdao region. The average nitrate content in groundwater was 26.45 mg· L-1. It was 27.27~42.66 times of that in Langfang, Hengshui and Cangzhou regions. The proportion exceeding the standard in Qinhuangdao region was the highest, 58.82%samples exceeded the criterion of national drinking water quality. Level I water mainly existed in Hengshui, Cangzhou and Langfang regions. Level I and level Ⅲ water mainly existed in Baoding, Xingtai, Handan, Shijiazhuang and Tangshan regions. Level Ⅲ water mainly dominated in Qinhuangdao, Zhangjiakou and Chengde regions. The distribution frequency of level ⅴ water in Zhangji-akou and Chengde regions were next only to level Ⅲ and level II water in each region, occupied 15.53%and 9.95%, respectively. |
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