Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022551 |
LSPIV Measurements of Two-Dimensional Flow Structure in Streams Using Small Unmanned Aerial Systems: 2. Hydrodynamic Mapping at River Confluences | |
Lewis, Quinn W.1,2; Rhoads, Bruce L.2 | |
2018-10-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:10页码:7981-7999 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Although past field work at stream confluences has relied on velocity information at specific cross sections to examine flow structure, detailed characterizations of spatial and temporal variations in the hydrodynamics of confluences are lacking. This study uses large-scale particle image velocimetry (LSPIV) obtained from small unmanned aerial systems (sUAS), a method evaluated in a companion paper, to map surficial patterns of mean flow and turbulent structures at two small stream confluences in unprecedented levels of detail. LSPIV reveals two-dimensional flow patterns within different hydrodynamic zones in each confluence as well as similarities and differences in hydrodynamic conditions between the confluences. As expected based on extant conceptual models of confluence hydrodynamics, the spatial arrangement of characteristic hydrodynamic zones varies with confluence planform geometry and with changes in incoming flow conditions. However, local morphological features, such as bars and irregularities in channel banks, also exert a strong influence on the spatial structure of flow and in some cases influence confluence hydrodynamics to an extent comparable to changes in incoming flow conditions. The usefulness of sUAS-based LSPIV is demonstrated by the correspondence between patterns of flow curvature revealed by this method and patterns of helical motion documented at cross sections within the confluences using acoustic Doppler velocimetry. The method can also be used to characterize the structure of turbulent vortices within the mixing interface between confluent streams under appropriate conditions. Hydrodynamic mapping using sUAS-based LSPIV enriches the interpretation of traditional in-stream velocity data acquired in the field and provides information on surface velocity patterns in rivers at a resolution similar to that of numerical models. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450726000047 |
WOS关键词 | PLANFORM GEOMETRY ; LOW-COST ; DYNAMICS ; CIRCULATION ; TURBULENCE ; PATTERNS ; CHANNELS ; LAYER ; ZONE ; BED |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21844 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Illinois, Dept Geog & Geog Informat Sci, Urbana, IL 61801 USA; 2.Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN 47405 USA |
推荐引用方式 GB/T 7714 | Lewis, Quinn W.,Rhoads, Bruce L.. LSPIV Measurements of Two-Dimensional Flow Structure in Streams Using Small Unmanned Aerial Systems: 2. Hydrodynamic Mapping at River Confluences[J]. WATER RESOURCES RESEARCH,2018,54(10):7981-7999. |
APA | Lewis, Quinn W.,&Rhoads, Bruce L..(2018).LSPIV Measurements of Two-Dimensional Flow Structure in Streams Using Small Unmanned Aerial Systems: 2. Hydrodynamic Mapping at River Confluences.WATER RESOURCES RESEARCH,54(10),7981-7999. |
MLA | Lewis, Quinn W.,et al."LSPIV Measurements of Two-Dimensional Flow Structure in Streams Using Small Unmanned Aerial Systems: 2. Hydrodynamic Mapping at River Confluences".WATER RESOURCES RESEARCH 54.10(2018):7981-7999. |
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