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本文在总结前人研究工作的基础上,通过雨后野外细沟侵蚀调查资料、试验小区观测和模拟降雨试验研究结果,分析了影响坡面细沟侵蚀的降雨径流侵蚀力与土壤抗蚀性因素;对细沟发生的水流侵蚀力临界条件和浅层洞穴诱发形成细沟的情况进行了较为深入的探讨,并对细沟发生的坡度与土壤抗剪力临界条件作了初步分析。
Abstract:Based on field data and simulation experiments, rill initiation and factors influencing rill development on ground surface are studied. Factors controlling rill erosion are found to be erosivity, soil shear strength and slope angle. The critical threshold condition for rill initiation can be described by the relationship between stream power and antecedent soil shear strength.According to observation,in addition to the incision by surface flow, the appearance of shallow holes on ground surface induces the development of rills.
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基本信息:
DOI:10.16239/j.cnki.0468-155x.1998.01.006
中图分类号:S157.1
引用信息:
[1]蔡强国.坡面细沟发生临界条件研究[J].泥沙研究,1998(01).DOI:10.16239/j.cnki.0468-155x.1998.01.006.
基金信息:
国家自然科学基金委员会支持研究课题