Webinar: Integrated thermal infrared imaging and structure-from-motion photogrammetry to map apparent temperature and radiant hydrothermal heat flux at Mammoth Mountain, CA, USA
Speaker: Aaron Lewis
Date/Time: Wednesday, November 13, 2019, 6 - 7 PM CDT
This is a webinar for GISC 1421: Raster-Based GIS taught by Sally Holl. The broader ACC GIS community is invited to participate. Click the Join Meeting button below to connect. Please contact Professor Holl with questions at sally.holl@austincc.edu.
Abstract
This work presents a method to create high-resolution (cm-scale) orthorectified and georeferenced maps of apparent surface temperature and radiant hydrothermal heat flux and estimate the radiant hydrothermal heat emission rate from a study area. A ground-based thermal infrared (TIR) camera was used to collect (1) a set of overlapping and offset visible imagery around the study area during the daytime and (2) time series of co-located visible and TIR imagery at one or more sites within the study area from pre-dawn to daytime. Daytime visible imagery was processed using the structure-from-motion photogrammetric method to create a digital elevation model onto which pre-dawn TIR imagery was orthorectified and georeferenced. Three-dimensional maps of apparent surface temperature and radiant hydrothermal heat flux were then visualized and analyzed from various computer platforms (e.g., Google Earth, ArcGIS). We demonstrate this method at the Mammoth Mountain fumarole area on Mammoth Mountain, CA. Time-averaged apparent surface temperatures and radiant hydrothermal heat fluxes were observed up to 73.7 °C and 450 W m−2, respectively, while the estimated radiant hydrothermal heat emission rate from the area was 1.54 kW. Results should provide a basis for monitoring potential volcanic unrest and mitigating hydrothermal heat-related hazards on the volcano.
Shaded relief map of Mammoth Mountain and surrounding area. Dashed black and solid white lines show approximate location of Long Valley caldera rim and extent of major
Mammoth Mountain dacite flows, respectively. Square shows location of the Mammoth Mountain fumarole (MMF) area. Bottom left inset is photo of the FLIR T650sc thermal infrared camera mounted on tripod above the MMF area. (From Lewicki et al., 2015, https://doi.org/10.1016/j.jvolgeores.2015.07.025)
About the Speaker
Aaron Lewis is a water resources engineer currently employed at EKI Environment and Water, Inc., an environmental engineering consulting firm in the California Bay Area. He has experience in supporting public and private clients in developing strategic responses to the Sustainable Groundwater Management Act (SGMA), including the preparation of Groundwater Sustainability Plans (GSPs), and providing other technical and management services related to groundwater supply and quality. He holds a B.S. in Geology (2015) and an M.S. in Environmental Engineering (2016) from Stanford University, and has academic research experience in subsurface contaminant transport and mobility, hydrothermal resource investigations, and environmental biotechnologies including wastewater energy recovery and waterborne pathogen detection technologies.
Connection Information
You can start connecting up to 10 minutes before the webinar start time.
Meeting number (access code): 928 393 480
Meeting password: cdNA96in
| Wednesday, November 13, 2019 |
| 5:50 pm | (UTC-06:00) Central Time (US & Canada) | 1 hr |
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