干旱区生态环境知识资源中心(Arid): Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions

Arid

DOI	10.3390/rs12101610
	Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions
	Yang, Shengtian; Li, Chaojun; Lou, Hezhen; Wang, Pengfei; Wang, Juan; Ren, Xiaoyu
通讯作者	Lou, HZ
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2020
卷号	12 期号:10
英文摘要	Ephemeral rivers are vital to ecosystem balance and human activities as essential surface runoff, while convenient and effective ways of calculating the peak discharge of ephemeral rivers are scarce, especially in ungauged areas. In this study, a new method was proposed using an unmanned aerial vehicle (UAV) combined with the incipient motion of stones to calculate the peak discharge of ephemeral rivers in northwestern China, a typical arid ungauged region. Two field surveys were conducted in dry seasons of 2017 and 2018. Both the logarithmic and the exponential velocity distribution methods were examined when estimating critical initial velocities of moving stones. Results reveal that centimeter-level orthoimages derived from UAV data can demonstrate the movement of stones in the ephemeral river channel throughout one year. Validations with peak discharge through downstream culverts confirmed the effectiveness of the method. The exponential velocity distribution method performs better than the logarithmic method regardless of the amount of water through the two channels. The proposed method performs best in the combination of the exponential method and the river channel with evident flooding (>20 m(3)/s), with the relative accuracy within 10%. In contrast, in the river channel with a little flow (around 1 m(3)/s), the accuracies are weak because of the limited number of small moving stones found due to the current resolution of UAV data. The poor performance in the river channel with a little flow could further be improved by identifying smaller moving stones, especially using UAV data with better spatial resolution. The presented method is easy and flexible to apply with appropriate accuracy. It also has great potential for extensive applications in obtaining runoff information of ephemeral rivers in ungauged regions, especially with the quick advance of UAV technology.
英文关键词	UAV remote sensing Ephemeral rivers flood peak discharge incipient motion arid ungauged regions
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000543394800077
WOS关键词	WATER SECURITY ; ALTIMETRY DATA ; IMAGERY ; CHALLENGES ; RESISTANCE
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324845
作者单位	[Yang, Shengtian; Li, Chaojun; Lou, Hezhen; Wang, Pengfei] Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China; [Yang, Shengtian; Li, Chaojun; Lou, Hezhen; Wang, Pengfei] Beijing Key Lab Urban Hydrol Cycle & Sponge City, Beijing 100875, Peoples R China; [Wang, Juan] Beijing Normal Univ, Beijing Key Lab Environm Remote Sensing & Digital, Beijing 100875, Peoples R China; [Wang, Juan] Beijing Normal Univ, Fac Geog Sci, Sch Geog, Beijing 100875, Peoples R China; [Ren, Xiaoyu] Beijing Weather Modificat Off, Beijing 550001, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shengtian,Li, Chaojun,Lou, Hezhen,et al. Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions[J]. 北京师范大学,2020,12(10).
APA	Yang, Shengtian,Li, Chaojun,Lou, Hezhen,Wang, Pengfei,Wang, Juan,&Ren, Xiaoyu.(2020).Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions.REMOTE SENSING,12(10).
MLA	Yang, Shengtian,et al."Performance of an Unmanned Aerial Vehicle (UAV) in Calculating the Flood Peak Discharge of Ephemeral Rivers Combined with the Incipient Motion of Moving Stones in Arid Ungauged Regions".REMOTE SENSING 12.10(2020).