A Preliminary Study of Rill Marks in the Yellow River Delta
- 出版年：2000
- 作者：ZHONG Jian-hua；WU Kong-you；NI Jin-ren
- 单位1：Changsha Institute of Geotectonics,CAS,Changsha
- 单位2：Department of Resources and Environment, University of Petroleum, Dongying, Shandong
- 出生年：1958
- 职称：Professor
- 语种：中文
- 作者关键词：rill marks；Yellow River delta
- 起始页：527
- 总页数：8
- 经费资助：This work was supported by the Major State Basic Research Program under the grant No.G1999043603；National Natural Science Foundation of Chi-na (No.409972037)；Natural Science Foundation of Shandong province(No.Q99EOl)
- 刊名：沉积学报
- 是否内版：否
- 刊频：季刊
- 创刊时间：1983
- 主办单位：中国科学院兰州地质研究所；沉积学会
- 主编：叶连浚
- 卷：18
- 期：4
- 期刊索取号：P371.066243
摘要
In recent years, the flow of the Yellow River has often been interrupted, which has resulted in exposure of chan-nel bars and point bars, and even extensive exposure of the riverbed. Consequently, a large number of rill marks have devel-oped. They are diverse in morphology. According to the hydrodynamic types of their formation, they can be grouped into 6categories, i.e.the wave-eroded, backwash, seepage, rain-eroded, water-drainage and runoff rill marks. Morphologically,they can be divided into more than ten types: the linear, tooth-shaped, comb-shaped, fence-like, ear-like, braided,branched, leaf-like, flower-like, root-like, dendritic, net-like, radial etc. Their cross sections include the broad-u type (thewidth/depth ratio is over 2, and may reach 10-20) , U-type (width/depth ratio from 1 to 2) , V-type, Ω-type and (-type.Their occurrenoes may be attributed to the variations in composition, grain-size, color, fabric and morphology. They have 5 .scales: the micro-scale (length and width within 1 cm) , small-scale (length and width within 10 cm), medium-scale (lengthand width ranging from 10-100cm) , large-scale (length and width 1-5 m) and giant-scale (length or width over 5 m).