Laws of Soil Erosion in Loess Hilly and Gully Region of Dingxi Prefecture

Dong Rongwan; Zhu Xingping; He Zenghua; Wan Tingchao; Wang Xiaoping

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Laws of Soil Erosion in Loess Hilly and Gully Region of Dingxi Prefecture

- Laws of Soil Erosion in Loess Hilly and Gully Region of Dingxi Prefecture
- Bulletin of Soiland Water Conservation Vol. 17, Issue 3, Pages: 1-9(1998)
- 作者机构：
  
  甘肃省定西地区水土保持科学研究所,定西县,743000
- 作者简介：
- 基金信息：
- DOI：
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- Published：1998
- 稿件说明：
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Dong Rongwan, Zhu Xingping, He Zenghua, et al. Laws of Soil Erosion in Loess Hilly and Gully Region of Dingxi Prefecture[J]. Bulletin of Soiland Water Conservation, 1998, 17(3): 1-9.
DOI：

Dong Rongwan, Zhu Xingping, He Zenghua, et al. Laws of Soil Erosion in Loess Hilly and Gully Region of Dingxi Prefecture[J]. Bulletin of Soiland Water Conservation, 1998, 17(3): 1-9. DOI：

摘要

通过在高泉沟小流域建立的水土流失监测网络

系统研究了小流域自然因素和人为因素与土壤侵蚀的关系

小流域水土流失时空变化规律及小流域水流泥沙概念性耦合模型

揭示了定西黄土丘陵沟壑区土壤侵蚀规律

并建立了坡面土壤侵蚀数学模型。人为因素减水减沙的贡献率分别为79.11%和85.69%

由降雨减少引起的减水减沙的贡献率分别为20.89%和14.3%;并应用水流泥沙概念性耦合模型

对“ 两期”治理效果进行了分析评价

探索了模型法评估水土保持减水减沙总效果的途径。

Abstract

Based on the monitoring net of soil and water conservation at Gaoquan gully small watershed

the relation between natural factors and man-made factor

the laws of time and spacial variation

the generalized coupling model of sediment at small watersheds were studied systemati-cally

and the mathematic model was established .The results show that the contributing ratio of man-made factor to runoff and sediment reduction was 79.11%

and that of natural factors was 85.69%.The laws of time and spacial variation of loess anti-erodibility and erodibility

and the effects of different indexes on runoff and sediment yield were analysed

the mathematic model on relation between vegetation and soil erosion was also established.According to the generalized coupling model

the effect of“two periods” harness was analysed and evaluated.

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