陕北黄土区切沟内陷穴发育特征研究

发布时间：2018-05-14 05:28

  本文选题：黄土高原 + 陷穴　； 参考：《土壤通报》2017年04期

【摘要】：通过对陕北黄土区六道沟流域切沟内陷穴进行调查和统计分析,探讨陷穴的发育形态、分布特征及其影响因素。结果表明:陷穴主要形态类型有浅碟形、漏斗形、竖井状以及葫芦状,其断面形态接近于圆形或椭圆形,陷穴形态规模相对偏小,处于成熟期的比例达72.8%;陷穴长轴、短轴和深度之间均具有显著的正相关关系,其中长轴和短轴之间具有较好的线性关系;陷穴主要发育位置为沟道中上游及支沟沟头处,多与黄土桥和跌水相伴而生;切沟为陷穴的形成和发育提供了条件,陷穴亦可促进切沟进一步发展。上述结果完善了切沟内陷穴的发生发育特点和空间分布特征,为深入认识陷穴侵蚀机理,进一步研究陷穴侵蚀状况、陷穴与切沟发育关系以及区域水土流失治理等提供了基础。
[Abstract]:Based on the investigation and statistical analysis of the caverns in the Liudaogou watershed in the loess region of northern Shaanxi, the developmental morphology, distribution characteristics and influencing factors of the caverns were discussed. The results show that the main morphological types of the cave are shallow dish shape, funnel shape, shaft shape and gourd shape. The shape of the section is close to the circular or elliptical shape, the size of the cave is relatively small, and the proportion in the mature stage is 72.8. There is a significant positive correlation between the short axis and the depth, among which there is a good linear relationship between the long axis and the short axis. The cutting groove provides the condition for the formation and development of the pit, and it can also promote the further development of the notch. The above results improve the characteristics of occurrence and development and spatial distribution of the caverns, and provide a basis for further understanding of the erosion mechanism of the caverns, further study of the erosion status of the caverns, the relationship between the caverns and the gully development, and the control of regional soil erosion and so on.
【作者单位】： 沈阳农业大学水利学院;中国科学院地理科学与资源研究所;辽宁双台河口湿地生态系统国家定位观测研究站;
【基金】：国家自然科学基金项目(41571221) 中国博士后科学基金项目(2015T80129)资助
【分类号】：S157
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本文编号：1886566