干热河谷冲沟发育区不同层位土体抗冲性研究  

Soil Anti-scourability of Different Horizons in Gully Developed Area of Dry-hot Valley Region

作　　者：郑学用 熊东红[1,2] 张素[1,2,4] 鲜纪绅[5] 杨丹[1,2,3] 张宝军[1,2,3] 郭敏[1,2,3] 

机构地区：[1]中国科学院山地灾害与地表过程重点实验室,四川成都610041 [2]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [3]中国科学院大学,北京100049 [4]四川农业大学农学院,四川成都611130 [5]四川省电力设计院环保所,四川成都610072

出　　处：《水土保持通报》2015年第6期101-105,共5页Bulletin of Soil and Water Conservation

基　　金：国家重点基础科学(973)研究发展计划项目"横断山地水土作用失衡机制与灾害风险评价"(2015CB452704);中国科学院"西部之光"重点项目(Y4R2060060);中国科学院水利部成都山地灾害与环境研究所"青年百人团队"项目(SDSQB-2011-01);四川省应用基础研究计划项目(2014JY0067)

摘　　要：[目的]对干热河谷冲沟发育区不同层位土体抗冲性进行比较研究,为冲沟侵蚀治理措施制定提供科学依据。[方法]通过原状土槽冲刷法进行试验研究。[结果](1)各层土体抗冲性均随冲刷时间呈幂函数增大(除第Ⅳ,Ⅴ层土体因裂隙的存在而在冲刷前期表现为抗冲性能随冲刷时间呈线性增加外);(2)不同层位土体初始抗冲性差异显著,依次为:Ⅰ层>Ⅱ层>Ⅵ层>Ⅲ层,Ⅳ层>Ⅴ层。[结论]研究区各层位土体抗冲性在存在差异,总体上表现为随土层深度的增加呈旋回式减小。[Objective]The anti-scourabilities of soils from different horizons in gully developed area of dryhot valley region were compared in order to provide a scientific basis for gully erosion control.[Methods]Undisturbed soil sampled from six different horizons were eroded with scour trough in laboratory.[Results]（1）Except layers ofⅣandⅤ,the soil anti-scourability of other horizons increased in a power function with the scouring time.Resulted from the existence of fissure,the two layers exhibited a linear function at the scouring earlier stage.（2）There were significant differences in soil anti-scourability among each horizon with ranks as：layerⅠ〉layerⅡ〉layerⅥ〉layerⅢ,layer Ⅳ〉layer Ⅴ.[Conclusion]Soil anti-scourability decreased with the depth of each horizon in a gyratory way with ranks of layer〉Ⅰlayer〉Ⅱlayer〉Ⅲ,and layer Ⅳ〉layer Ⅴ〉layerⅥ.

关 键 词：土体抗冲性 不同层位 冲沟 干热河谷 

分 类 号：S157.1[农业科学—土壤学]