地理学报 ›› 2007, Vol. 62 ›› Issue (9): 1002-1007.doi: 10.11821/xb200709011

• 环境化学 • 上一篇    

雅鲁藏布江径流水文规律及水体同位素组成

高志友1, 王小丹2, 尹观1   

  1. 1. 成都理工大学地球化学系,成都610059;
    2. 中国科学院成都山地灾害与环境研究所,成都610041
  • 收稿日期:2007-07-10 修回日期:2007-08-22 出版日期:2007-09-25 发布日期:2010-08-04
  • 作者简介:高志友(1972-), 女, 四川成都人, 博士, 主要从事同位素地球化学研究。E-mail: cdannie@163.com
  • 基金资助:

    国家“973”项目资助(2005CB422005)

Hydrological Rule and Isotopic Composition of Water Bodies in Yar lung Zangbo River

GAO Zhiyou1, WANG Xiaodan2, YIN Guan1   

  1. 1. Department of Geochemistry, Chengdu University of Technology, Chengdu 610059, China;
    2. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China
  • Received:2007-07-10 Revised:2007-08-22 Online:2007-09-25 Published:2010-08-04
  • Supported by:

    National 973 Program of China, No.2005CB422005

摘要:

由雅鲁藏布江各站径流量数据和水体的同位素数据,分析了径流的时空分布特点以及大气降水的同位素效应。该区干流流域年平均径流量分布呈从下游到上游逐渐减少的趋势, 且地表径流的年内分配主要集中在夏、秋两季(6-10 月)。流域内大部分雨水和河水样品的同位素组成均落在全球大气降水线δD = 8δ18O +10 的右上方,显示出强烈蒸发的特征。水体同 位素组成区域大陆性效应和高度效应明显,这种分布特征与来自孟加拉湾、怒江方向降水云汽的运移以及青藏高原的地形、气候条件有关。

关键词: 径流, 水文规律, 同位素组成, 雅鲁藏布江, 西藏

Abstract:

Based on data of runoff and water isotopic compositions in the Yarlung Zangbo River, this paper mainly analyzes the spatio-temporal distribution of runoff and isotopic effect of precipitation in this area. In the trunk-stream drainage area, the average annual runoff presents a trend of gradual decrease from lower reaches to upper reaches, and the intra-annual surface runoff mostly concentrates in summer and autumn (June to October). The isotopic compositons of most water samples fall on the top right of the global precipitation line, δD = 8 δ18O+10, showing that they have experienced intensive evaporation. With obvious region-continental effect and altitude effect, the distribution of water isotopic compositions is related to the movement of precipitation clouds from Bay of Bengal and Nujiang River and is affected by the topographic and climatic conditions of the Qinghai-Tibet Plateau.

Key words: runoff, hydrological rule, isotopic composition, Yarlung Zangbo River, Tibet