水科学进展2016，Vol.27Issue(1)：22-30,9.DOI:10.14042/j.cnki.32.1309.2016.01.003
坡面不同侵蚀沟断面特征及水力几何形态
Cross-section characteristics and hydraulic geometry of different erosion gullies on slopes
摘要
Abstract
Gully erosion is one important cause of soil and water loss on slopes, and research on gully morphology is very necessary for understanding principles governing gully erosion and estimating sediment transport. The cross-section characteristics and hydraulic geometry of different erosion gullies on bare sloping land with loamy soil were studied through the collation and analysis of approximate 35 field data sets in China and abroad, and the criteria used to distinguish the erosion gullies were also given. Results showed that the width to depth ratio (ζ) gradually decreased with the development of erosion gullies, and the suitable range of ζ for rills, ephemeral gullies, gullies and streams were 5—17, 2—5, 0. 4—1. 8 and 0. 1—0. 6, respectively. The types of loamy soil also affected the ζ value for the same erosion form, and ζ increased as soil particle size increased. Different erosion gullies had different hydraulic ge-ometry indices, and the exponents β1 ,β2 and β3 were 0. 3, 0. 4 and 0. 3 for rills, respectively; and correspondingly 0. 4, 0. 4 and 0. 2 for ephemeral gullies and gullies;and 0. 5, 0. 4 and 0. 1 for stream. Preliminary validation of the criteria indicated that they could be used to distinguish the different erosion gullies.关键词
坡耕地/侵蚀沟/宽深比/水力几何形态/判别标准Key words
slope land/erosion gully/width to depth ratio/hydraulic geometry relation/criteria分类
农业科技引用本文复制引用
赵春红,高建恩..坡面不同侵蚀沟断面特征及水力几何形态[J].水科学进展,2016,27(1):22-30,9.基金项目
国家自然科学基金资助项目(41371276) （41371276）
"十二五" 国家科技支撑计划资助项目(2011BAD31B05) The study is financially supported by the National Natural Science Foundation of China (No. 41371276) and the National Key Technologies R&D Program of China during 12th Five-year Plan Period (No. 2011BAD31B05) . （2011BAD31B05）
