Knowledge Resource Center for Ecological Environment in Arid Area
| 额济纳旗浅层地下水环境及成因分析 | |
| 苏永红 | |
| 出版年 | 2004 |
| 学位类型 | 硕士 |
| 导师 | 吕世华 |
| 学位授予单位 | 中国科学院寒区旱区环境与工程研究所 |
| 中文摘要 | 额济纳旗位于我国西北干旱内陆河流域区黑河下游，由于其独特的地理位置和自然气候条件，使得把水资源的重要性放到了首要位置，而水环境的研究和评价就成了当务之急。本文通过对2003年5月野外采集的水样进行实验室分析，利用水文地球化学分析方法对试验结果进行分析。探讨了额济纳旗浅层地下水的运移及转化规律、形成机理，以及人类活动对地下水的影响。总结出：额济纳旗浅层地下水的主要来源是黑河水的补给，矿化度的变化依赖于上游的补给量；其次，根据研究区的地形、地貌以及水文地质条件的特征，并将研究区划分为两个剖面进行分析，得出额济纳旗浅层地下水的水化学类型遵循干旱半千旱区地下水的运移规律，其化学成分的形成作用主要是溶滤作用、蒸发和浓缩作用、混合作用和离子交换吸附作用；第三，人类活动对额济纳旗钱层地下水的水环境变化起着重要的作用，从宏观上说，它使的地下水水位从有长期连续观测资料（1989-2001年）以来不断下降，微观上，使的额旗浅层地下水的矿化度不断升高，而这种影响又反作用于生态环境，使得环境恶化。本文研究的意义在于通过独立的水文地质单元的水化学成分研究，找出其分布演化规律与伴生环境的关系，为额旗及西北地区具有类似条件的地区的水资源合理开发利用提供科学依据。 |
| 英文摘要 | This paper mainly studies the chemical environment evolution of shallow groundwater in Ejina. Ejina is in lower reaches of Heihe river basin in the arid inland regions, the northwestern of China. First priority should be given to exploration and efficient utilization of water resource due to the region's special grographic site and nature climatic condition, so research and evaluation of water environment has been an urgent task. This paper mainly analyze experimental date of groundwater samples obtained in may, 2003 using geochemistry principles of hydrology, at the same time solute movement and forming mechanism of the shallow groundwater in Ejina. The main result are as follows:The most shallow groundwater in Ejina come from Heihe river and the change of the water quality characteristics depend on recharged water quantity by upper reaches. By describing and analyzing the topography and hydrogeologic conditions of the Ejina, the paper divided study region into two profiles: a-a and b-b We can conclude from the profiles that chemical types of shallow groundwater in Ejina accord with solute movement regulation, in groundwater in arid and semi-arid areas and these types have been mainly formed by leaching effect, evaporation and concentration process, mixture process, adsorption and exchange reaction, respectively. In recent years human activities have had an badly effect on the hydrochemical environment of shallow groundwater in Ejina. On macroscopical side it made groundwater level descenting from 1989 to 2001 on microscopic side it made degree of mineralization increasing and environment deteriorating in Ejina. By study of the hydrochemical composition of relatively independent hydrogeologic unit to discover the chemical evolution regulation, distribution pattern and the relationship to its coexistence environment (rock minerals) and provided scientific base for water-seeking in similar geologic conditions and reasonable exploration and utilization of water resource in the northwestern region. |
| 中文关键词 | 地下水化学成分 ; 矿化度 ; 溶滤作用 ; 蒸发浓缩作用 ; 混合作用 ; 地下水位 ; 人类活动 |
| 英文关键词 | chemical composition of shallow groundwater degree of mineralization leaching effect evaporation and concentration process mixture process adsorption and exchange reaction level of groundwater human activies |
| 语种 | 中文 |
| 国家 | 中国 |
| 来源机构 | 中国科学院西北生态环境资源研究院 |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/286355 |
| 推荐引用方式 GB/T 7714 | 苏永红. 额济纳旗浅层地下水环境及成因分析[D]. 中国科学院寒区旱区环境与工程研究所,2004. |
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