长江科学院院报 ›› 2023, Vol. 40 ›› Issue (3): 37-45.DOI: 10.11988/ckyyb.20211141

• 水资源 • 上一篇    下一篇

青海湖沙柳河流域水汽再循环研究

王志刚1,2,3, 曹生奎1,2,3, 曹广超1,3, 侯瑶芳1,2,3   

  1. 1.青海师范大学 地理科学学院,西宁 810008;
    2.青海省自然地理与环境过程重点实验室,西宁 810008;
    3.青海省人民政府-北京师范大学高原科学与可持续发展研究院,西宁 810008
  • 收稿日期:2021-10-28 修回日期:2022-02-17 出版日期:2023-03-01 发布日期:2023-03-28
  • 通讯作者: 曹生奎(1979-),男,青海西宁人,教授,博士,研究方向为生态水文与水资源。E-mail:caoshengkui@163.com
  • 作者简介:王志刚(1996-),男,安徽安庆人,硕士研究生,研究方向为生态水文与水资源。E-mail:Wzg_gis@163.com
  • 基金资助:
    青海省自然科学基金项目(2018-ZJ-905)

Recirculation of Water Vapor in Shaliu River Basin of Qinghai Lake

WANG Zhi-gang1,2,3, CAO Sheng-kui1,2,3, CAO Guang-chao1,3, HOU Yao-fang1,2,3   

  1. 1. College of Geographical Sciences,Qinghai Normal University,Xining 810008, China;
    2. Qinghai ProvincialKey Laboratory of Physical and Environmental Processes, Xining 810008, China;
    3. Academy of PlateauScience and Sustainability, Government of Qinghai Province and Beijing Normal University,Xining 810008, China
  • Received:2021-10-28 Revised:2022-02-17 Online:2023-03-01 Published:2023-03-28

摘要: 陆地蒸发水汽是水循环过程的关键环节,深刻影响内陆河流域的水资源和生态环境,研究水汽再循环比例对区域水资源调配和管理具有重要意义。选取2019年5—9月份青海湖沙柳河流域13个采样点的月降水同位素数据,利用基于稳定同位素的水汽再循环模型,分析了再循环水汽对流域降水的贡献比例,以期为该流域水循环研究提供基础数据和理论参考。分析结果表明:①2019年5—9月份青海湖沙柳河流域逐月平均水汽再循环比例分别为11.01%、12.64%、8.13%、9.48%和14.97%,平均为11.25%;其季节变化特征明显,5月份流域水汽再循环比例开始增加然后降低,到9月份达到最大值,呈先增加后降低再增加特征。②各月水汽再循环比例空间分布状况存在差异性。③6—8月份流域河源地区水汽再循环比例均大于河口地区,从河口地区到河源地区呈现明显的增加趋势,水汽再循环比例最高值均位于流域的西北部山区。④5—9月份水汽再循环比例主要受500 m高度东向水汽来源和海拔影响。沙柳河流域水汽再循环是该流域重要的降水来源之一,关注流域水汽再循环有利于流域的水资源管理和有效利用。

关键词: 水汽再循环, 稳定同位素, 大气降水, 水资源调配, 青海湖, 沙柳河流域

Abstract: As a key link in the water cycle process, land evaporative water vapor profoundly affects the water resources and ecological environment of inland river basins. The study of water vapor recirculation ratio is of great significance to the deployment and management of regional water resources. In the objective of providing basic data and theoretical references for the water cycle study in the basin, we looked into the contribution of recirculated water vapor to precipitation by using the water vapor recirculation model based on the stable isotope method. We selected the monthly precipitation isotope data of 13 sampling points in the Shaliu river basin of Qinghai Lake from May to September 2019 for the model. From May to September 2019, the monthly average water vapor recirculation ratio in the Shaliu river basin of Qinghai Lake was 11.01%, 12.64%, 8.13%, 9.48% and 14.97%, respectively, averaging 11.25%. The recirculation ratio presents obvious seasonal changes: in May, the ratio begins to increase, and then reduces, and increase again, reaching the maximum in September. In spatial scale, the monthly water vapor recirculation ratio differs: from June to August, the recirculation ratio in the river source area is greater than that in the estuary area, displaying a clear increasing trend from the estuary area to the river source area. The northwest mountainous area of the basin sees the maximum recirculation ratio. The ratio from May to September is mainly affected by altitude and the eastward water vapor source at a height of 500 m. Water vapor recirculation is an important source of precipitation in the Shaliu river basin. Attentions to the water vapor recirculation will be conducive to the management and effective use of water resources in the basin.

Key words: water vapor recirculation, stable isotope, precipitation, water resources allocation, Qinghai Lake, Shaliu river basin

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