Student: Jessica Sheldon
Department: Earth, Environmental and Planetary Sciences
Defense Date: Monday, May 3, 2021
Time: 3:00 p.m.
When is Drone Photogrammetry Useful for Flood Risk Assessment?
Drone technology and the high resolution datasets it enables stand to revolutionize our understanding of the Earth’s surface. This research is Houston specific, and assesses when drone photogrammetry is useful for flood risk assessment. This data is the culmination of three years of research. Prior to this year, the focus has been learning to fly the drone, learning the image processing Pix4D and ArcMap 10.5, and creating a workflow for accurate image collection processing. This study has collected three separate datasets of the study area at Buffalo Bayou using a DJI Phantom 4 Pro drone. This data was then processed and modeled in Pix4D to create digital elevation models (DEMs). The DEMs
were calibrated and analyzed in GIS, and compared to the publicly available 2018 LIDAR data. Our research catalogues high resolution change over time of our study area, and documents the process of how drones can be used to systematically observe change over time. Additionally, our data highlights the difference in resolution between a low elevation drone flight versus a higher elevation LIDAR scan. The goal of this research is to help an individual or lab group assess if a DJI Phantom 4 Pro would be beneficial to their environmental research, and how to use it after they have invested.