AN INITIAL APPROACH TO THE REDISTRIBUTION LAWS OF PRECIPITATION ON CONVEX AND CONCAVE HILLSLOPES

Jiang Ding-sheng; Liu Mei-mei; Huang Guo-jun

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AN INITIAL APPROACH TO THE REDISTRIBUTION LAWS OF PRECIPITATION ON CONVEX AND CONCAVE HILLSLOPES

- AN INITIAL APPROACH TO THE REDISTRIBUTION LAWS OF PRECIPITATION ON CONVEX AND CONCAVE HILLSLOPES
- Bulletin of Soiland Water Conservation Vol. 6, Issue 1, Pages: 45-50(1987)
- 作者机构：
  
  中国科学院西北水土保持研究所
- 作者简介：
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- Published：1987
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Jiang Ding-sheng, Liu Mei-mei, Huang Guo-jun. AN INITIAL APPROACH TO THE REDISTRIBUTION LAWS OF PRECIPITATION ON CONVEX AND CONCAVE HILLSLOPES[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 45-50.
DOI：

Jiang Ding-sheng, Liu Mei-mei, Huang Guo-jun. AN INITIAL APPROACH TO THE REDISTRIBUTION LAWS OF PRECIPITATION ON CONVEX AND CONCAVE HILLSLOPES[J]. Bulletin of Soiland Water Conservation, 1987, 6(1): 45-50. DOI：

摘要

黄土高原地形破碎

地面倾斜度大

降水常在坡面上发生再分配。通过研究

已得到几点结论: 1、坡面接收雨量与坡度的关系式为P_a=Pcosasinβ〔见文中式(1)〕;2、坡面上降水不发生再分配的临界值

7°坡面为7毫米

15°坡面为4.3毫米

27.5°坡面为3.2毫米

30°坡面为2.8毫米;3、土壤蓄水量沿坡的变化规律是

旱季

在坡的中部土壤湿度最大

雨季末

自山顶至坡脚

土壤湿度逐渐变大。

Abstract

In the Loess Plateau with broken topograhpy and steep earth's surface

the rain redistribution always takes place on hillslopes. Based on field studies

some conclusions have been drawn by us:1

The relationship between received precipitation on slope and steep degree is expressed by equation P

=Pcosasins [f(1)〕2

The critical value of the unredistribution of precipitation on hillslope is enumerated:7°-7mm

15°-4.3mm

27.5°-3.2mm

30°-2.8mm;3

Change law of soil-moisture storage from hilltop to the slope base= In the dry season

the most soil-moisture storage is situated in the central section of hillslopej after the rain season the soil-moisture storage is increasing little by little down the slope.

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