摘要
【目的】定量分析南水北调中线干渠周边浅层地下水受污染程度,及其对干渠水质造成污染的可能.【方法】以焦作市区段干渠周围浅层地下水为研究对象,构建SF-AHP模型以确定不同离子的污染贡献率;利用最差分析法和逆推法定量分析受污地下水对干渠水质的影响.【结果】污染贡献率按从大到小的顺序为总硬度>Cr^(6+)>pH>TDS>Cl^->SO_4^(2-);在干渠水质达到Ⅱ类水标准限值的情况下,受污地下水进入干渠后,Cl^-、Cr^(6+)、TDS、总硬度分别超标0.067 6、0.029 1、0.060 8、0.069 1倍,干渠水质由Ⅱ类降为Ⅲ类;若干渠水中Cl^-、Cr^(6+)、TDS、总硬度的浓度分别小于232.464 5、0.048 5、936.879 4、232.085 8mg/L,则即使受污地下水经逆止阀进入干渠,也能保证干渠水仍符合Ⅱ类水.【结论】研究区浅层地下水已受到较严重的污染,会对干渠水质造成影响;但当污染离子浓度控制在一定范围时,干渠水质仍将保持II类水标准.
【Objective】This paper is aimed to quantitatively analyze the pollution of shallow groundwater around the midline of South-to-North Water Transfer Project,and the possibility of shallow groundwater polluting the water quality of the main canal.【Method】The shallow groundwater around main canal in Jiaozuo section was took as the research object,and the contribution rate of each pollution index was determined by SF-AHP model.And the influence of contaminated groundwater on the water quality of the main canal was quantitatively analyzed.【Result】The order of pollution contribution rate was:total hardness>Cr 6+>pH>TDS>Cl->SO 4 2-.Under the assumption that the main canal water quality reached II class of water standard and the polluted groundwater entered the main canal,the pollution concentration of Cl-,Cr 6+,TDS and total hardness would exceed 0.067 6、0.029 1,0.060 8,0.069 1 times of the standard respectively and the water quality in main canal would drop from class to classⅢ;If the pollution concentration of Cl-,Cr 6+,TDS and total hardness of water in main canal were not more than 232.464 5,0.048 5,936.879 4 and 232.085 8 mg/L respectively,the water quality in main canal still meet the standard of classⅡeven the polluted groundwater entered the main canal.【Conclusion】The shallow groundwater in the study area was serious polluted,which will affect the water quality of the main channel.However,when the ion concentration is controlled within a certain range,the water quality of the main channel will still maintain class II.
作者
李建林
林璐
王万雄
吴海江
赵晨晨
LI Jian-lin;LIN Lu;WANG Wan-xiong;WU Hai-jiang;ZHAO Chen-chen(College of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,China;College of Hydrology and Water Resources,Hehai University,Nanjing 210098,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,Jiaozuo 454000,China;College of Science,Gansu Agricultural University,Lanzhou 730070,China)
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2018年第4期124-129,共6页
Journal of Gansu Agricultural University
基金
国家自然科学基金项目(41672240
41573095)
国家大学生创新创业训练计划项目(201710460017)
关键词
南水北调中线
内排段
浅层地下水
污染贡献率
SF-AHP模型
焦作段
middle route of South-North Water Transfer Project
internal discharge section
shallow groundwater
pollution contribution rate
SF-AHP model
Jiaozuo section
