地理科学 ›› 1986, Vol. 6 ›› Issue (1): 48-55.doi: 10.13249/j.cnki.sgs.1986.01.48

• 论文 • 上一篇    下一篇

西北地区河川径流年内分配的初步研究

汤奇成   

  1. 中国科学院地理研究所 北京
  • 出版日期:1986-01-20 发布日期:1986-01-20

PRELIMINARY STUDY ON THE RIVER RUNOFF DISTRIBUTION IN NORTHWEST REGION OF CHINA

Tang Qicheng   

  1. Institute of Geography, Academia Sinica, Beijing
  • Online:1986-01-20 Published:1986-01-20

摘要: 本文采用新指标:峰型度α值,年丰枯率β值和γ值研究西北干早地区径流的年内分配.并在此基础上结合河川径流其他特性对我国西北干早地区河流类型作了划分.

Abstract: According to feature of hydrology in northwest region of China,three paramers α,β and γ can be used to study river runoff distribution,α= W4-8/W7-9 here W4-8—total runoff volume from April to June,W7-9—total runoff volume from July to Sept..α can be explained as a ratio of volume of season snow melt to glacial melt at high mountains and rain volume in total annual runoff.
β=W4-8/W10-3
here W4-9—total runoff volume from April to Sept.,W10-3—total run off volume from Oct.to next March..β can be explained as a ratio of flood runoff volume to non flood runoff volume,also a ratio of supply of ground water tototal annual runoff volume. The parameter γ,can be estimated by
γ=(α-α)/σα
here α—long term average annual αα—mean square error of α. The paper used the three parameters to make preliminary an approach to the classification of rivers in northwest region of China.