基于环境同位素示踪闪电河流域三水转化关系研究

发布时间：2018-05-15 06:24

本文选题：地下水 + 地表水　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：随着全球气候和经济的快速变化,造成生态环境严重破坏,生活中各种用水问题越来越严重,为深入探究合理利用水资源提供理论性依据,最终实现正蓝旗人、水、自然的和谐发展。论文以正蓝旗境内的闪电河流域为研究,在地下水、地表水、大气降水氢氧同位素的测定基础上,分析得到"三水"之间转化关系,系统研究了分布规律。从时间、空间和气候环境角度分析"三水"间的关系,用三端源线性混合模型定量分析计算三水之间补给关系及补给量。在综合分析讨论的基础上,可以得到以下结论:(1)分别研究地下水、地表水、大气降水"三水"间的δD、δ180同位素分布规律和补给关系,对比4年各季节的氘盈余量平均值可知,冬季的氘盈余量在数值上大于春季、夏季与秋季,并且随着环境温度和降雨量的变化氘盈余量先减小后增大,降雨量最大时其氘盈余量最小。(2)结合4年的温度、降雨量来对大气降水中的δD、δ18O含量分析和研究,结果表明温度较高,降雨量较多的6、7月份的大降水中的δD、δ18O含量较大,大气降水中δD、δ18O的含量随着温度的升高、降雨量的增大而增大。(3)分别研究地下水、地表水与大气降水线的关系得:地表水相比地下水更加靠近当地大气降水线,另外,这也说明大气降水大量的补给地下水。在地下水接受大气降水补给一段时间后,地下水中的δD、δ18O含量慢慢接近当地大气降水中的δD、δ18O含量。(4)采用三端源线性混合模型计算,计算结果表明从春季到秋季在同一断面上大气降水、上游地表水补给比例先增大后减少,地下水的补给比例先减少后增大。
[Abstract]:With the rapid changes of the global climate and economy, the ecological environment is seriously damaged, and the problems of water use in life become more and more serious. It provides a theoretical basis for further exploring the rational use of water resources, and finally realizes the people of Zhenglan flag, water, The harmonious development of nature. On the basis of the determination of hydrogen and oxygen isotopes of groundwater, surface water and atmospheric precipitation, the transformation relationship between "three rivers" is obtained and the distribution law is systematically studied in this paper, taking the Lightning River Basin in Zhenglan Banner as a research area, based on the determination of hydrogen and oxygen isotopes in groundwater, surface water and atmospheric precipitation. The relationship between "three water" is analyzed from the angle of time, space and climate environment, and the supply relation and supply quantity between three water are calculated quantitatively by using the linear mixing model of three end sources. On the basis of comprehensive analysis and discussion, the following conclusions can be drawn: (1) the 未 D, 未 180 isotopic distribution and recharge relationship between groundwater, surface water and precipitation are studied respectively, and the average value of deuterium surplus in each season of 4 years is compared. The value of deuterium surplus in winter is larger than that in spring, summer and autumn, and with the change of ambient temperature and rainfall, deuterium surplus decreases first and then increases, and when rainfall is maximum, deuterium surplus is the smallest. The contents of 未 D, 未 18O in precipitation are analyzed and studied by precipitation. The results show that the contents of 未 D and 未 18O in precipitation are higher than those in high temperature, and the contents of 未 D and 未 18O in precipitation in July are higher than those in July, and the contents of 未 D and 未 18O in precipitation increase with the increase of temperature. The relationship between the surface water and the precipitation line is studied. It is concluded that the surface water is closer to the local precipitation line than the ground water. In addition, this also shows that the atmospheric precipitation recharge groundwater. After the groundwater is recharged by atmospheric precipitation for a period of time, the contents of 未 D and 未 18O in groundwater are slowly approaching those in local atmospheric precipitation, and the content of 未 D, 未 18O is calculated by using the three-terminal source linear mixed model. The results show that the upper surface water recharge ratio first increases and then decreases, and the groundwater recharge ratio decreases first and then increases from spring to autumn on the same section.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P339

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