Shi Hui,Duan Hongbin,Liu Puling.Primary Analysis of Erosion Distribution Laws on Slope[J].Research of Soil and Water Conservation,1997,4(02):64-68,74.
坡面土壤侵蚀分布规律的初步分析
- Title:
- Primary Analysis of Erosion Distribution Laws on Slope
- Keywords:
- slope erosion; distribution laws; Weibull distribution
- 摘要:
- 通过在坡面不同位置布设REE示踪元素来研究坡面的侵蚀分布规律，结果表明：坡面的侵蚀分布符合Weibull概率分布模型。其中形状参数m与降雨量、降雨历时和径流深相关，而已度参数a与平均雨强、I30相关。坡面的平均侵蚀强度基本上位于从坡脚向上的28～55m内；与我们假设的平均侵蚀强度位于坡面的下2/3处基本一致。但由于侵蚀过程的复杂性与影响因子的多样性．有些问题尚未解决，还有待于进一步研究。
- Abstract:
- Ahstract Through arranging rareearth elements(REE) at different position of slope to study erosive distribution laws of slope, the results showed that erosive distribution of slope accorded with weibull possibility possibility distribution model. Its shape parameter m was correlated with precipitation, rain times and runoff depth, while scale parameter a was correlated with average rainfall intensity and I30. Basically average erosion intensity of slope lied in 28~55m toward slopeefoot. This is consist with our assumption that average erosion intensity lied in the place whichis 2/3 from slope top. Butdue to complexity of erosive process and diversity of its affecting factors, some problems were unsolved and expected tobe further researched.
参考文献/References:
1 United States Department of Agriculture,Predicting Rainfall Erosion Losses,Agriculture Handbook,No. 537
2 江忠善.地形因素与坡地水土流失关系的研究.中国科学院西北水土保持研究所集刊,1990,(12)
3 石辉,田均良、刘普灵等.利用REE示踪法研究小流域泥沙来源.中国科学E辑,1996,26(5)
4 田均良,周佩华,刘普灵等.REE示踪法研究初报.水土保持学报,1992,6(2)
5 Knaus.R. M. etc, Accretion and Canal impact, in a rapidly subsiding wetland. Ⅲ A new soil horizon maker method for measuring recent accretion,Estuaries,1989,12(4)
6 田均良,彭祥林.黄土高原土壤地球化学,科学出版社,1995
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备注/Memo
收稿日期:1996-9-10