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Tracking a Surrogate Hazardous Agent (Rhodamine Dye) in a Coastal Ocean Environment Using In Situ Measurements and Concentration Estimates Derived from Drone Images
Name
remotesensing-13-04415-v2.pdf
Size
19.77 MB
Format
Adobe PDF
Checksum (MD5)
9c8a5746179ae135299fba5bcb505448
Author(s)
Filippi, Margaux
Hanlon, Regina
Rypina, Irina I.
Hodges, Benjamin A.
Peacock, Thomas
Schmale, David G.
Date Issued
November 2, 2021
Publisher
Multidisciplinary Digital Publishing Institute
Citation
Remote Sensing 13 (21): 4415 (2021)
Version
Final published version
Abstract
New tools and technology are needed to track hazardous agents such as oil and red tides in our oceans. Rhodamine dye (a surrogate hazardous agent) was released into the Atlantic ocean in August 2018, and experiments were conducted to track the movement of the dye near the water surface within three hours following the release. A DrOne Water Sampling SystEm (DOWSE), consisting of a 3D-printed sampling device tethered to a drone, was used to collect 26 water samples at different locations around the dye plume. Rhodamine concentrations were measured from the drone water samples using a fluorometer and ranged from 1 to 93 ppb. Dye images were taken during the drone-sampling of surface water containing dye and at about 10 m above the sampling point. These images were post-processed to estimate dye concentrations across the sampling domain. A comparison of calibrated heat maps showed that the altitude images yielded dye distributions that were qualitatively similar to those from images taken near the ocean surface. Moreover, the association between red ratios and dye concentrations yielded trendlines explaining up to 67% of the variation. Drones may be used to detect, track and assist in mitigating hazardous agents in the future.
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Creative Commons Attribution
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DOI of Published Version
http://dx.doi.org/10.3390/rs13214415
