| 李霄,林学钰,都基众,崔健.齐齐哈尔市潜水水化学演化规律分析[J].水利学报,2014,45(7): |
| 齐齐哈尔市潜水水化学演化规律分析 |
| Analysis of hydrochemical evolution of phreatic water in Qiqihar City |
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| DOI： |
| 中文关键词: 齐齐哈尔市 潜水 水化学演化 PhreeQC 三氮 |
| 英文关键词: Qiqihar City phreatic water hydrochemical evolution PhreeQC 3-nitrogen |
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| 中文摘要: |
| 为研究齐齐哈尔市潜水水化学成分尤其是硝酸盐氮等无机污染组分的时空演化规律，以区域地下水流场特征和不同时期潜水样品采集测试数据为基础，利用PhreeQC 水文地球化学模拟软件建立3组反应路径模型，通过饱和指数计算和质量平衡模拟方法进行水化学时空演化规律分析。模拟结果表明PathA、C 所处的河谷平原区相对PathB 所在的冲积平原区而言，在潜水水化学类型、矿物溶解沉淀性的时空变化幅度较大，水中常规组分及污染组分NH4+（N3-）、NO3-（N5+）、NO2-（N3+）参与反应的能力比较活跃，“三氮”污染更为严重；水岩环境中铝硅酸盐矿物和石英逐渐趋于溶解，碳酸盐矿物始终处于饱和状态。研究认为，溶滤作用、阳离子交换吸附作用、浓缩作用及人类活动，导致潜水中Ca2+、Mg2+、Cl-、SO42-、“三氮”等含量和组成上的时空变化，是引起水化学类型和水岩环境矿物组成发生改变的主要原因。 |
| 英文摘要: |
| The objective of this article is to study the evolution of the hydro-chemical constituents of phreatic water in Qiqihar， especially the inorganic pollutants of nitrate nitrogen and others. The research was based on the characteristics of regional groundwater flow and the analysis data of phreatic water samples in different periods. Then，three reaction path models were established through PhreeQC hydrogeochemical simulation software. At last， the law of temporal and spatial variation of hydrochemical constituents was analyzed through the SI（saturation index） calculation and mass balance simulation. The simulation results show that， comparing with Path B in the alluvial plain， the types of phreatic water chemistry and mineral dissolution-precipitation of Path A & C in the river valley plain change greatly， and the ability of conventional components and NH4+（N3-）， NO3-（N5+）， NO2-（N3+） to be participated in the reaction is more active， and the“three-nitrogen” pollution of phreatic water is more serious. The aluminum-silicate minerals and quartz in water-rock environment dissolve gradually， and carbonate minerals are always in a state of saturation.The main reason for leading the changes of the phreatic water chemistry types and mineral compositions is the variation of Ca2+， Mg2+， Cl-， SO42- ，“three-nitrogen” contents and compositions caused by the lixiviation，cation exchange adsorption，inspissation and human’s activities. |
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