地理科学 ›› 1994, Vol. 14 ›› Issue (1): 73-80.doi: 10.13249/j.cnki.sgs.1994.01.73

• 论文 • 上一篇    下一篇

下垫面因素对产沙时变影响分析

包为民   

  1. 河海大学水资源水文系 南京210024
  • 收稿日期:1993-01-01 出版日期:1994-01-20 发布日期:1994-01-20

EFFECTS OF TIME-VARIATION OF GEOMORPHOLOGIC AND GEOLOGIC FACTORS ON SOIL EROSION

Bao Weimin   

  1. Department of Hydrology, Hehai University, Nanjing 210024
  • Received:1993-01-01 Online:1994-01-20 Published:1994-01-20

摘要: 采用非参数假设检验方法,对年产沙模数估计方程中下垫面因素的时变影响作定性分析,结果表明,对于一般流域,如果没有人类活动或自然灾害破坏导致下垫面条件的突变,下垫面因素对产沙的影响可看作是时不变的.

Abstract: In modelling of sediment yields,the effects of time-variation of geomorphotgic and geologic factors on soil erosion were generally neglected. Errors of this neglection affect-ed the sediment yield models obviously. In this paper,a revised universal soil erosion e-quation was selected, the effects of errors of this neglection on it were tested by non-parametric hypothetical test method of Kolmogorov-Smirnov for a 22-year period within 21 catchments of the middle Huanghe River region,and the results show that the effects of errrors of this neglection on soil erosion were not significant,at 5% probability level.