干旱半干旱荒漠化草原区降水-地表水-地下水同位素分布特征——以达尔罕茂明安联合旗为例
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A170.55

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中国水利水电科学研究院科研专项项目(MK2016J15;MK2017J01);国家重点研发项目(2017YFC1502400); 中央分成水资源费项目(126301002000180003)。


Characteristics of Stable Isotopes in Precipitation,Surface Water and Groundwater in the Arid and Semi-arid Desertification Steppe:a case study in the Darhan Maomingan Joint Banner
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    摘要:

    为能揭示出研究尚处于初级阶段的干旱半干旱荒漠化草原区水循环机理,本文应用被视为水体“DNA”探索的同位素示踪方法,对以达尔罕茂明安联合旗为例的干旱半干旱荒漠化草原区所采集的降水、地表水和地下水中同位素含量的时空分布特征进行探究。根据降水氢氧同位素含量及其氘盈余(d)值的变化过程,发现研究区大气降水水汽在夏季主要受海洋季风的影响、冬季主要受蒙古高压影响,而且从时空变化来看研究区地表水和地下水同位素含量随时间变化不大但由于纬度和降水源区不同的影响随着自西向东的空间变化各水体同位素含量逐渐变大。此外,研究区地表水和地下水同位素含量均散落于当地大气降水方程线下方,说明研究区域内地表水和地下水的补给来源主要为降水,并且部分区域地表水与地下水同位素含量分布比较集中,属于交叉分布,说明这些区域还存在地表水和地下水转换互补。

    Abstract:

    In order to reveal the water cycle mechanism of the arid and semi-arid desertification steppe, which is still in the initial stage of research, we using isotope tracer technique--the way to explore “DNA” of the water--study the temporal and spatial distribution characteristics of isotope content in the precipitation, surface water and groundwater collected in the arid and semi-arid desertification such as Darhan Maomingan Joint Banner. According to the content of hydrogen and oxygen isotope in the precipitation and the change process of the surplus value of deuterium (d), it is found that the atmospheric precipitation water vapor in the research area is mainly affected by the ocean monsoon in summer and by Mongolian high pressure in winter; the isotopic content in the surface water and groundwater in the area don’t not change much with time, while influenced by different latitude and precipitation source, the isotope content of each water body gradually increases from west to east spatially. In addition, the isotope content in the surface water and groundwater in the area are scattered below the local atmospheric precipitation equation line, revealing that the recharge sources of surface water and groundwater here are mainly precipitation. What’s more, the centralized and intersected distribution of isotope content in the surface water and groundwater in some areas suggests that there are complementation and conversion between the surface water and groundwater in these areas.

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韩振华,张燕飞,王慧琪,等. 干旱半干旱荒漠化草原区降水-地表水-地下水同位素分布特征——以达尔罕茂明安联合旗为例[J]. 科学技术与工程, 2020, 20(28): 11463-11471.
HAN Zhen-hua, ZHANG Yan-fei, WANG Hui-qi, et al. Characteristics of Stable Isotopes in Precipitation, Surface Water and Groundwater in the Arid and Semi-arid Desertification Steppe:a case study in the Darhan Maomingan Joint Banner[J]. Science Technology and Engineering,2020,20(28):11463-11471.

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  • 收稿日期:2019-10-23
  • 最后修改日期:2020-06-24
  • 录用日期:2020-03-12
  • 在线发布日期: 2020-11-03
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