摘要
为考察南水北调东线工程对东平湖水环境的影响,为受水区域的用水安全提供保障,于东线工程通水前后分别采集不同水文时期的东平湖湖水样品,分析测定后,采用综合污染指数法、综合营养状态指数法、健康风险评价模型,评价东线工程通水前后东平湖湖水水质级别、营养化水平和健康风险水平的差异。结果表明:东线工程通水后,东平湖湖水综合污染指数由通水前的0.49变为通水后的0.58,水质级别仍为Ⅲ级轻度污染,部分指标超标但不严重;综合营养状态指数由通水前的50.72降为通水后的47.90,表明营养化水平由轻度富营养状态好转为中营养水平;健康风险由通水前的2.91×10^(-4)a^(-1)降为通水后的9.35×10^(-5)a^(-1),即由通水前的中—高风险水平降低为通水后的中风险水平。结论可知,南水北调东线工程的通水有利于东平湖湖水环境的改善,但与其他典型淡水湖泊相比,东平湖湖水的健康风险仍相对偏高,后续需要进一步加强湖区环境保护和污染排放的管控。
To investigate the influence of east route of South to North Water Transfer Project on Dongping Lake water environment and to ensure the safe usage of water receiving area,samples were collected before and after water delivery of in different hydrological seasons and determined,then comprehensive pollution index method,comprehensive nutrition state index method and health risk assessment model were utilized to evaluate the quality,nutrition,and health risk of Dongping Lake surface water.Results showed that the quality of Dongping Lake surface water still satisfied level Ⅲ（light pollution） no matter before or after water delivery with comprehensive pollution index verified from 0.49 to 0.58 meaning some indicators exceeded but not serious,the nutrition level was improved from mild eutrophication before water delivery to medium nutrition after water delivery with comprehensive nutrition state index reduced from 50.72 to 47.90 and the health risk level was reduced from high-medium before water delivery to medium level after water delivery with health risk fell from 2.91×10^-4a^-1 to 9.35×10^-5.In summary,water delivery of east route of South to North Water Transfer Project is benefit for water environment improvement of Dongping Lake.However,compared with other typical freshwater lakes,the health risk of Dongping Lake is still relatively higher,so environment protection and pollution control should be strengthened in further.
出处
《山东国土资源》
2017年第10期46-51,共6页
Shandong Land and Resources
基金
山东省地矿局地质科技攻关项目(KY201516)
山东省物化探勘查院科研基金(鲁物科基字[2015]1号)
关键词
南水北调
东平湖
水质
营养化
健康风险
山东
South to North Water Transfer Project
Dongping Lake
water quality
nutrition
health risk
Shandong province
