地理学报 ›› 1997, Vol. 64 ›› Issue (3): 254-261.doi: 10.11821/xb199703007

• 论文 • 上一篇    下一篇

伊春河河水溶解态有机碳含量和输出通量的时空变化

陶澍, 梁涛, 徐尚平, 狄雯华   

  1. 北京大学城市与环境学系,北京100871
  • 收稿日期:1996-05-01 修回日期:1996-11-01 出版日期:1997-05-15 发布日期:1997-05-15
  • 基金资助:
    国家杰出青年基金(49525102),国家自然科学基金(49271063)

TEMPORAL AND SPATIAL VARIATION OF DISSOLVED ORGANIC CARBON CONTENT AND ITS FLUX IN YICHUN RIVER

Tao Shu, Liang Tao, Xu Shangping, Di Wenhua   

  1. Department of Urban and Environmental Sciences, Peking University, Beijing 100871
  • Received:1996-05-01 Revised:1996-11-01 Online:1997-05-15 Published:1997-05-15

摘要: 在测定了伊春河不同季节河水溶解态有机碳(DOC)含量和流量的基础上,探讨了DOC含量与流量的关系和时空变化规律,并计算了伊春河DOC输出通量。研究结果表明,非冰封期伊春河DOC主要来自外源,其含量从上游至下游逐渐升高。DOC含量和变速均与流量密切相关,但较流量波动滞后约8h.据此建立的双曲线方程可用来估算DOC含量和输出通量。在伊春河封冻之后,外源被完全阻断,河水DOC含量仅受内源控制,因而与流量成反比。据计算,伊春河DOC年输出通量为7113t,相当于2.88gC/m2.其中90%以上集中在雨季的5个月中。

关键词: 溶解态有机碳, 河流, 有机碳通量

Abstract: The contents of dissolved organic carbon (DOC) and the flow of Yichun River were determined and the spatial and temporal variations in DOC content and flux were studied. It was found that in the summer, DOC is originated primarily from the allochthonous sources and the content of DOC increases downstream. There is a synchronous fluctuation of DOC contents and flow with a 8 hour delay of the former. A hyperbolic equation can fit the data well and is able to predict the DOC content and flux based on flow measurements. During the winter season when the river is totally covered by ice, the autochthonous source becomes dominant and the DOC content is negatively correlated to flow due to dilution effect. The DOC flux of the river was calculated to be 7 113 ton/yr, or 2.88 gC/m2穣r, among which over 90% occurs during the 5 months in the wet season.

Key words: DOC, river, organic carbon flux

中图分类号: 

  • P641.3