地理研究

地理研究 ›› 1990, Vol. 9 ›› Issue (4): 61-71.doi: 10.11821/yj1990040009

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Γ型地貌瞬时单位线探讨

靳长兴   

  1. 陕西机械学院水利系
  • 收稿日期:1986-11-30 出版日期:1990-12-15 发布日期:1990-12-15

A STUDY OF GAMMA TYPE GEOMORPHOIOGIC INSTANTANEOUS UNIT HYDROGRAPH

Jin Changxing   

  1. School of water Resources and Hydro-elective Engineering, Shaanxi Institute of Mechanical Engineering
  • Received:1986-11-30 Online:1990-12-15 Published:1990-12-15

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4

摘要： 在地貌瞬时单位线中作者假定沿任一“路径”的等待时间密度函数成Γ型分布。本文讨论了Γ型地貌瞬时单位线的推导、参数确定和特点。并取蛇家口、三川口流域的突测资料验证,计算洪峰值和涨洪历时与实测值十分接近。

关键词: 地貌瞬时单位线, 流速, 降雨

Abstract: Horton's empirical laws of network composition is studied and applied to six catchments in North Shaanxi Province of China, The relationships between Horton parameters are discussed.Based upon the Horson's laws, a geomorphologic instantaneous unit hydrograph (GUH) model is proposed, in which, the waiting time distribution in each path is supposed to be a Gamma distribution. General expressions for the inital state probability anb the transition probability in GUH are derived. All the parameters but one in the GUH are calculated from Horton parameters and stream flow velocity of each flood event. The unknown parameter is decided by optimization.The proposed model is applied to ten rainfall-runoff events in two catchments, the results are encouraging.

Key words: Geomorphologic Instantaneous Unit Hydrograph (GUH), volocity, rainfall