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  4. 中国科学院新生代地质与环境重点实验室
Longitudinal variations in channel morphology of an ephemeral stream from upland to lowland, Daihai Lake basin, North China

文献类型：期刊论文

作者Tan, Chengpeng2,3; Feng, Shuangqi3,4; Zhao, Xiaoming3; Shan, Xin1; Feng, Shenglun3
刊名GEOMORPHOLOGY
出版日期2021
卷号372页码:16
ISSN号0169-555X
关键词Channel morphology Ephemeral stream Monsoon climate Flow regime UAV photogrammetry
DOI10.1016/j.geomorph.2020.107450
英文摘要Recognizing variations in channel morphology of ephemeral streams and deciphering controls on the variations are important for environment management and protection, and even for paleoenvironment reconstruction. In-sights gained from modern ephemeral streams in various hydroclimatic or tectonic settings are a key to elucidating the relationship between channel morphology and genetic processes. In this study, we present a small ephemeral stream in a semi-arid area with influence of the East Asia monsoon in North China. Based on field work and high-resolution topographic data collected by unmanned aerial vehicle (UAV), this study reveals detailed geomorphological characteristics of the ephemeral stream from upland to lowland, which is divided into five segments. The channel dimension exhibits an overall increasing longitudinal trend in the upland and a general decreasing trend in the lowland, but locally, the lowland channel morphology fluctuates quasi-periodically. Quantitative analysis of channel morphological parameters and related factors is conducted to discuss the controls on channel morphology. Variations in the upland channel morphology are directly influenced by discharge/drainage area, composition of substrate, and sediment flux, and indirectly affected by slope. Ephemeral floods in the uplands, associated with an unconsolidated substrate that produces a high sediment flux, are capable of generating larger channels than the case for perennial flows in the bedrock-dominated upland. In the lowland, fluctuation in channel reach morphology is an integrated result of the local flow regimes, vegetations, and anthropogenic activities. Froude supercritical flows associated with hydraulic jumps are inferred as the primary cause of the alternating channel geometry in the lowland. Through this study, we highlight the significant roles of intensive floods derived from monsoon precipitation and abundant sediment supply in forming large-scale ephemeral stream channels, yet details of flood process are needed for further exploration. (C) 2020 Elsevier B.V. All rights reserved
WOS关键词STRUCTURE-FROM-MOTION ; HYDRAULIC GEOMETRY ; REACH MORPHOLOGY ; RIVER INCISION ; ARID-REGION ; KOBO BASIN ; LOW-COST ; BEDROCK ; SEDIMENT ; WIDTH
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41625010] ; National Natural Science Foundation of China[41690114] ; National Natural Science Foundation of China[41602117] ; China Postdoctoral Science Foundation[2020M670445]
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000589918400002
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/99860]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Tan, Chengpeng
作者单位1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
3.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China
4.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China
推荐引用方式
GB/T 7714		 Tan, Chengpeng,Feng, Shuangqi,Zhao, Xiaoming,et al. Longitudinal variations in channel morphology of an ephemeral stream from upland to lowland, Daihai Lake basin, North China[J]. GEOMORPHOLOGY,2021,372:16.
APA Tan, Chengpeng,Feng, Shuangqi,Zhao, Xiaoming,Shan, Xin,&Feng, Shenglun.(2021).Longitudinal variations in channel morphology of an ephemeral stream from upland to lowland, Daihai Lake basin, North China.GEOMORPHOLOGY,372,16.
MLA Tan, Chengpeng,et al."Longitudinal variations in channel morphology of an ephemeral stream from upland to lowland, Daihai Lake basin, North China".GEOMORPHOLOGY 372(2021):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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