跌水高度对元谋干热河谷冲沟沟头侵蚀产沙特征的影响初探OA北大核心CSCDCSTPCD
Preliminary Study on Effects of Headcut Height on Soil Erosion and Sediment Yield at Gully Heads in Yuanmou Dry-hot Valley Region
元谋干热河谷冲沟侵蚀强烈，以沟头溯源侵蚀过程为主，陡立沟壁跌坎是活跃沟头的重要形态特征之一。采用野外原位放水冲刷试验，研究了25和50 cm两种不同跌水高度对侵蚀产沙过程的影响。结果表明：2种跌水高度下，（1）径流跌水冲刷力差异显著。跌水势能转化量平均值分别为4.89和9.78 J s-1，跌水剪切力平均值分别为25.9和53.5 Pa，均呈现倍数关系。（2）跌穴发育形态特征及下游侵蚀量差异大。2个小区跌水最大下切深度分别为7.38和7.50 c…查看全部>>
Objective]Gully erosion is very severe in the Yuanmou Dry-hot Valley Region,dominated with headward erosion,which is characterized by steep gully headcuts. During the field investigations, headcut height is often regarded as one of the main indices of distinguishing the type of gully head activity. The abrupt drop of concentrated flow at headcut would cause a sudden change of the runoff in hydrodynamics, thus accelerating the headward erosion processes. It i…查看全部>>
张宝军;熊东红;杨丹;张素;校亮;苏正安;董一帆
中国科学院山地灾害与地表过程重点实验室，成都 610041 中国科学院水利部成都山地灾害与环境研究所，成都 610041 中国科学院大学，北京 100049中国科学院山地灾害与地表过程重点实验室，成都 610041 中国科学院水利部成都山地灾害与环境研究所，成都 610041中国科学院山地灾害与地表过程重点实验室，成都 610041 中国科学院水利部成都山地灾害与环境研究所，成都 610041
农业科技
径流冲刷力侵蚀产沙特征跌水高度冲沟沟头元谋干热河谷
Runoff erosivityCharacteristics of soil erosion and sediment yieldHeadcut heightGully headYuanmou Dry-hot Valley Region
《土壤学报》 2017 (1)
48-59,12
国家重点基础研究发展计划（973）项目（2015CB452704）、国家自然科学基金项目（41571277）和中国科学院“西部之光”重点项目（Y4R2060060）共同资助 Supported by the National Basic Research Program of China（973 Program）（No.2015CB452704），the National Natural Science Foundation of China（No.41571277）and the Key Programme of the “Western Light” Talents Cultivation programme of the Chinese Academy of Sciences（No. Y4R2060060）
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