引用本文: | 翟婧雅,金彦香,金鑫.巴音河流域水体水化学、氢氧同位素特征及不同水体转换研究[J].灌溉排水学报,0,():-. |
| zhai jing ya,jin yan xiang,jin xin.巴音河流域水体水化学、氢氧同位素特征及不同水体转换研究[J].灌溉排水学报,0,():-. |
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摘要: |
【目的】刻画水资源短缺与时空分布不均匀的巴音河流域不同水体的转换关系。【方法】结合水体水化学和稳定同位素技术,分析巴音河流域不同水体的水化学特征,探讨水体离子来源及控制因素,识别不同水体间的补给机制。【结果】(1)水样的pH值、TDS及DO均值分别为7.53、399 mg/L和5.46 mg/L;河水、泉水阴离子以SO42-为主,地下水阴离子以Cl-为主;所有水体阳离子均以Ca2+为主。(2)Na+/(Na++Ca2+)比值主要分布在蒸发-结晶作用和岩石风化带之间,且远离大气降水带;(3)巴音河流域水体蒸发线的斜率(4.94)明显小于当地及全球大气降水线斜率;河水氢氧稳定同位素的平均值介于流域北部山区大气降水和地下水的平均值之间。【结论】(1)蒸发结晶作用和岩石风化作用是控制流域水体水化学特征的主要因素,且蒸发岩和碳酸盐的风化溶解是水体离子的主要来源。(2)上游地下水接受地表水渗漏和侧向径流补给,比例分别为43.36%、56.64%;中游地下水接受地表水和河流上游补给,比例分别为69.51%、30.49%;下游地表水接受地下水和泉水补给,比例分别为10.26%、89.74%。 |
关键词: 水化学;稳定同位素;水文过程;补给机制;干旱区内陆河流域 |
DOI: |
分类号:P339 |
基金项目:国家自然科学基金(42161020);青海省科技厅自然科学基金(2021-ZJ-705) |
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Hydrochemical, hydrogen and oxygen isotopic features and transformation of different water bodies in Bayin River Basin |
zhai jing ya, jin yan xiang, jin xin
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Qinghai Normal University
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Abstract: |
【Objective】Described the transformation relationship between different water bodies in Bayin river basin with shortage and uneven temporal and spatial distributions.【Method】This study analyzed the hydrochemical characteristics of different water bodies in Bayin River Basin based on the combination of hydrochemical and stable isotope techniques, and discussed the characteristics and control sources of water ion content, and identified the recharge mechanisms between different water bodies.【Result】(1) The average values of pH, TDS and DO of water samples are 7.53, 399 mg/L and 5.46 mg/L respectively; The anions in river water and spring water are mainly SO42-, the anions in groundwater are mainly Cl-, and the cations in water are mainly Ca2+. (2) Na+/(Na++Ca2+) ratio is mainly distributed between evaporation crystallization and rock weathering zone, and fars away from atmospheric precipitation zone. (3) The slope of water evaporation line in Bayin River Basin (4.94) is significantly lower than that of local and global atmospheric precipitation lines; The average value of stable hydrogen and oxygen isotopes in the river water is between the average values of atmospheric precipitation and groundwater in the northern mountain area of the basin.【Conclusion】(1) Evaporation crystallization and rock weathering are the main factors controlling the hydrochemical characteristics of water bodies in the basin, and the weathering and dissolution of evaporite and carbonate are the main sources of water ions. (2) The upstream groundwater is recharged by surface water leakage and lateral runoff, accounting for 43.36% and 56.64% respectively; The groundwater in the middle reaches is recharged by surface water and upstream rivers, accounting for 69.51% and 30.49% respectively; The downstream surface water is recharged by groundwater and spring water, accounting for 10.26% and 89.74% respectively. |
Key words: Hydrochemistry; Stable isotopes; Hydrological processes; Arid inland river basin |