南京林业大学学报(自然科学版) ›› 2022, Vol. 46 ›› Issue (2): 169-178.doi: 10.12302/j.issn.1000-2006.202104021
孙荣卿1(), 董李勤1,*(), 张昆2,3,*(), 刘宏强2, 王耠熠1, 胡昭佚1
收稿日期:
2021-04-15
接受日期:
2021-10-02
出版日期:
2022-03-30
发布日期:
2022-04-08
通讯作者:
董李勤,张昆
基金资助:
SUN Rongqing1(), DONG Liqin1,*(), ZHANG Kun2,3,*(), LIU Hongqiang2, WANG Heyi1, HU Zhaoyi1
Received:
2021-04-15
Accepted:
2021-10-02
Online:
2022-03-30
Published:
2022-04-08
Contact:
DONG Liqin,ZHANG Kun
摘要:
【目的】了解若尔盖湿地国家级自然保护区水环境特征、水体补给关系,为合理保护和改善湿地水生态环境提供理论参考。【方法】采用液态水/水汽同位素分析仪测定了氢氧稳定同位素丰度,通过离子色谱仪测定八大离子水化学特征指标,对若尔盖湿地国家级自然保护区不同水体(降水、河水、沼泽水、地下水)的化学参数和氢氧稳定同位素[(δ(D)和δ(18O)]进行分析,研究该区域水化学类型和同位素空间分布特征,探讨了其形成原因和环境意义。【结果】①湖泊水体、黑河及其入沼泽水体、出沼泽水体的主要化学类型都为$HCO_{3}^{-}$-Ca型(重碳酸钙型水);②若尔盖夏季“大气水线”为δ(D) = 8.28 δ(18O)+13.86,说明受局地水汽、二次蒸发影响小,但蒸发强烈。偏小的δ(18O)和δ(D)值,反映了雨季受海洋性暖湿气团的影响,降水集中且丰沛,重同位素沿途受雨水冲刷作用较强的特点。HYSPLIT模拟结果证明若尔盖夏季水汽来源于平稳的西风带,受西风环流控制;③降水是其他水体(河水、沼泽水、地下水)最初始的补给来源;河水斜率与沼泽水斜率相近,趋近平行,说明二者的补给关系最为频繁和密切,其中沼泽水接受黑河的支流——果曲、津曲、阿蒙曲、德纳的补给,而黑河的干流与沼泽则是交汇补给。【结论】若尔盖各水体水化学特征主要受流域水岩作用所调控,水体氢氧稳定同位素特征揭示了流域降水、蒸发、大气环流及水文循环过程。
中图分类号:
孙荣卿,董李勤,张昆,等. 四川若尔盖湿地国家级自然保护区水体氢氧同位素与水化学特征[J]. 南京林业大学学报(自然科学版), 2022, 46(2): 169-178.
SUN Rongqing, DONG Liqin, ZHANG Kun, LIU Hongqiang, WANG Heyi, HU Zhaoyi. Hydrogen and oxygen isotopes and hydrochemical parameters of water samples from the Sichuan Zoige Wetland Nature Reserve[J].Journal of Nanjing Forestry University (Natural Science Edition), 2022, 46(2): 169-178.DOI: 10.12302/j.issn.1000-2006.202104021.
表1
保护区沼泽水和河水主要离子浓度"
水体类型 water type | 项目 item | 离子质量浓度(mg·L-1) | |||||||
---|---|---|---|---|---|---|---|---|---|
CI- | | | | Na+ | Mg2+ | K+ | Ca2+ | ||
沼泽水 marsh water | 最小值 | 5.82 | 1.44 | 137.32 | 1.08 | 2.84 | 4.59 | 0.49 | 36.00 |
最大值 | 15.48 | 12.67 | 419.00 | 8.40 | 21.69 | 36.09 | 5.63 | 105.45 | |
平均值 | 9.13 | 7.73 | 265.53 | 3.84 | 11.98 | 20.66 | 1.97 | 61.79 | |
标准差 | 3.01 | 3.85 | 96.46 | 2.46 | 6.76 | 10.97 | 1.58 | 22.17 | |
北部 沼泽水 northern swamp water | 最小值 | 7.24 | 7.49 | 256.20 | 2.61 | 10.79 | 20.93 | 1.43 | 50.12 |
最大值 | 15.48 | 12.67 | 419.00 | 8.40 | 21.69 | 36.09 | 5.63 | 105.45 | |
平均差 | 10.28 | 9.96 | 314.99 | 4.93 | 15.55 | 26.97 | 2.50 | 70.98 | |
标准差 | 2.83 | 1.76 | 66.74 | 2.06 | 4.42 | 5.40 | 1.58 | 19.72 | |
南部 沼泽水 southern swamp water | 最小值 | 5.82 | 1.44 | 137.32 | 1.08 | 2.84 | 4.59 | 0.49 | 36.00 |
最大值 | 6.67 | 2.88 | 146.40 | 1.12 | 3.28 | 5.22 | 0.81 | 41.63 | |
平均值 | 6.25 | 2.16 | 141.86 | 1.10 | 3.06 | 4.90 | 0.65 | 38.81 | |
标准差 | 0.43 | 0.72 | 4.54 | 0.02 | 0.22 | 0.32 | 0.16 | 2.82 | |
黑河及热曲 Heihe River and Requ | 最小值 | 5.82 | 0.00 | 53.29 | 1.52 | 1.52 | 1.64 | 0.58 | 12.92 |
最大值 | 8.24 | 3.60 | 142.01 | 3.24 | 4.16 | 6.50 | 1.71 | 37.75 | |
平均值 | 7.35 | 1.09 | 93.96 | 2.63 | 2.69 | 3.67 | 1.18 | 25.64 | |
标准差 | 0.74 | 1.33 | 29.42 | 0.54 | 0.84 | 1.63 | 0.44 | 8.45 | |
入湖河流 rivers entering the lake | 平均值 | 6.25 | 6.53 | 205.06 | 9.79 | 3.68 | 13.35 | 1.32 | 58.26 |
出湖河流 rivers out flowing the lake | 平均值 | 7.29 | 4.94 | 175.00 | 5.20 | 7.13 | 12.10 | 1.64 | 41.74 |
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