DETERMINATION OF SURFACE VELOCITY OF A RIVER USING VIDEOS CAPTURED FROM UNMANNED AERIAL SYSTEM (UAS)

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Shrestha, S.^1¹  Thapa, M.^2²  Feng, L. G. Y.^3³  Abdelkader, S.^4⁴  Prinz, T.^5⁵ 

[1] Department of Photogrammetry and Remote Sensing, Land Management Training Centre, Government of Nepal^1;Geodetic Survey Branch, Survey Department, Government of Nepal^2;Universidade Nova de Lisboa, Lisbon, Portugal^3;University of Jaume I, Castellon, Spain^4;University of Münster, Münster, Germany^5

关键词: UAS;    Surface Velocity;    Video Processing;    Object Detection;    OpenCV;    Matlab;   

DOI  :  10.5194/isprs-archives-XLII-2-W13-597-2019

学科分类：地球科学(综合)

来源: Copernicus Publications

【 摘 要 】

Water flow dynamics of a river has significant effect in the ecological functions played by the river. There exists an intricate relationship between discharge in a river and phenomenon such as sedimentation, prevalence of vegetation and river morphology. In order to better understand these phenomena, it is important to determine the velocity of the river. While there exist conventional in-river velocity measurement techniques, UAS based method offers the capability to make large number of measurements at a large number of locations without the need to place measuring instrument at each of these locations. In this paper, we present the results of application of UAS in determining surface velocity of river. In this study, we released floats along the river and captured videos by mounting RGB sensor as well as thermal sensor in the UAS. The videos were processed using OpenCV library as well as Matlab’s Image Processing Toolbox. This paper discusses the learnings of our study which indicates that videos captured from UAS can be used to determine surface velocity of a river.

【 授权许可】

CC BY