青海湖沙柳河流域水汽再循环研究

王志刚; 曹生奎; 曹广超; 侯瑶芳

doi:10.11988/ckyyb.20211141

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raybet体育在线院报 ›› 2023, Vol. 40 ›› Issue (3) : 37-45. DOI: 10.11988/ckyyb.20211141

水资源

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

作者信息 +

Recirculation of Water Vapor in Shaliu River Basin of Qinghai Lake

WANG Zhi-gang^1,2,3, CAO Sheng-kui^1,2,3, CAO Guang-chao^1,3, HOU Yao-fang^1,2,3

Author information +

文章历史 +

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。

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.

导出引用

王志刚, 曹生奎, 曹广超, 侯瑶芳. 青海湖沙柳河流域水汽再循环研究[J]. raybet体育在线院报. 2023, 40(3): 37-45 https://doi.org/10.11988/ckyyb.20211141

WANG Zhi-gang, CAO Sheng-kui, CAO Guang-chao, HOU Yao-fang. Recirculation of Water Vapor in Shaliu River Basin of Qinghai Lake[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(3): 37-45 https://doi.org/10.11988/ckyyb.20211141

中图分类号： P426.612

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