地理科学 ›› 1984, Vol. 4 ›› Issue (4): 312-320.doi: 10.13249/j.cnki.sgs.1984.04.312

• 论文 • 上一篇    下一篇

长江流域水平衡三要素分析

杨远东   

  1. 长江流域规划办公室 水文局
  • 出版日期:1984-07-20 发布日期:1984-07-20

THE ANALYS1S OF THREE KEY ELEMENTS OF WATER BALANCE 1N YANGTZE BAS1N

Yang Yuandong   

  1. Hydrology Bureau, Yangtze Valley Planning Office
  • Online:1984-07-20 Published:1984-07-20

摘要: 长江流域面积达180万平方公里,是我国最大的词流。它的水量和长度均居世界第三位。长江发源于"世界屋脊"的青藏高原,海拔6621米。流域位于北纬24°27’~35°54’、东经90°33’~122°19’之间,呈东西长、南北窄的流域形状。

Abstract: Proceeding from the isograms of longterm mean annual precipitation, runoff and evaporation, this paper introduces chiefly the regional distribution of the three key elements in water balance and their variations through-out the year or from year to year as well as further analyses the related characteristics between the precipitation and the runoff or evaporation in Yangtzer River basin, Yellow River basin and Pearl River basin. Some abnormalities in the relationships, such as the relation between drought index and runoff coefficient, show that pseudo-correlationand and its effects are existed.The runoff probabilities calculated for the three regions reflect better corresponding relationship between the key elements. Based on the data of 13 groups of Yangtze Basin, the author has calculated the evaporations. The examinations can satisfyingly be use in practice in plain, hilly and mountaineous area.