Shi Hui,Tian Junling,Liu Puling,et al.Study on Spatial Distribution of Erosion Yield in a Small Watershed by Simulation Experiment[J].Research of Soil and Water Conservation,1997,4(02):75-84,95.
小流域侵蚀产沙空间分布的模拟试验研究
- Title:
- Study on Spatial Distribution of Erosion Yield in a Small Watershed by Simulation Experiment
- Keywords:
- small watershed; spatial distribution; simulation experiment
- 摘要:
- 小流域是黄土高原水土流失综合治理的基本单元，研究其侵蚀产沙的空间分布，对于水土保持措施的实施，有着重要的意义。通过模拟试验，首次将REE示踪法引入到小流域侵蚀产沙的空间分布研究。试验结果表明：小流域侵蚀产沙的空间分布与小流域的沟道发育有着本质的联系。在流域发育的初始阶段，下切侵蚀是一种主要的侵蚀方式，侵蚀强烈部位从沟口向沟内延伸；随后河道侵蚀量减少，而溯源区和坡面产沙量增高。试验结果同时表明了REE多元素示踪法可比较满意地解决小流域侵蚀产沙的空间分布问题，是一种研究小流域泥沙来源的有效方法。
- Abstract:
- A small watershed is the basic unit of comprehensively controlling soil and water loss in the Loess Plateatl. It is very important for designing soil and water conservation measures and preventing soil and water loss to study its spatlal distrlbution of erosion yield. In this paper, the REE tracer method was flrstly applied on spatial distribution of erosion yield in a small watershed by simulation experiment. The results showed:there are an essentlal connection between spatial distributlon of erosion and developing of gullies in a small watershed. At the first stage of watershed developing, gully cutting erosion was a main eroslve way, and the part of erosive intensity extended from lower course to upper course. Then, with the developing of gullies, there existed a trend that gully erosive intensity gradually decreased and erosive intensity of slope and headward erosion nrea gradually incrensed. The results also showed that REE multi - element tracer could perfectly solve the problem of spatial distribution of erosion in a small watershed, and REE tracer method was an effective method for studying sediment sourcein a small watershed.
参考文献/References:
1 Tian Junliang, Zhou Peihua.Liu Puling etc.REE tracer method for studies on soil erosion。International Journal of Sediment Research,1994, 9 (2)
2 田均良,周佩华,刘普灵等.土壤侵蚀REE示踪法研究初报.水土保持学报.1992,6(4)
3 朱震达.应用数量方法来研究黄土丘陵地区的侵蚀地貌.地理学报, 1958.No.3
4 田均良,彭祥林等著.黄土高原土壤地球化学.科学出版社,1994
5 刘昌明.黄土区土壤水分动态及其与降雨产流的关系.地理集刊,No. 12,水文分析与实验,科学出版社,1980
6 蒋定生,周清,范兴科等,小流域水沙调控正态整体模型模拟试验,水土保持学报,1994,8(2)
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备注/Memo
收稿日期:1996-9-10