8 results on '"Wong, Tyler"'
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2. Grain size estimation in fluvial gravel bars using uncrewed aerial vehicles: A comparison between methods based on imagery and topography
- Author
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Wong, Tyler, primary, Khanal, Sami, additional, Zhao, Kaiguang, additional, and Lyon, Steve W., additional
- Published
- 2023
- Full Text
- View/download PDF
3. 2021 UCI CanSat Winter Design Review Poster
- Author
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Wong, Brandon, Wong, Alan Nicholas, Zhao, Andrew, Cumming, Ian Marc, Judd, Briggs, Brusa, Joshua Dylan, Slagle, Thomas Benjamin, Wong, Tyler Chung-Wah, and Castro, Jr., Oscar Rene
- Subjects
probe ,satellite ,CanSat ,rocket ,maple seed ,parachute ,controlled descent ,PCB ,3D print ,Poster ,UCI Dean's Choice Award 2021 - Abstract
Abstract: The CanSat Competition is an international event held annually that is focused around design/build/fly engineering. In this year’s mission, the team must design and build a CanSat which will be launched 700m high using a high-powered model rocket and then perform a controlled descent while transmitting data from its onboard sensors to a ground station computer. Initially, the CanSat descends under a parachute at 15 m/s. The first payload is released at 500m and the second payload will be released at 400m. The payloads are designed to function like maple seeds; upon deployment, they will auto-rotate and descend at a rate of 20 m/s. The CanSat must be equipped with sensors to monitor environmental conditions (temperature, pressure, GPS position, altitude) and system performance (orientation, battery voltage). It must be capable of transmitting telemetry in real-time to a ground station computer, which the team must also design and build.
- Published
- 2021
4. Grain size estimation in fluvial gravel bars using uncrewed aerial vehicles: A comparison between methods based on imagery and topography.
- Author
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Wong, Tyler, Khanal, Sami, Zhao, Kaiguang, and Lyon, Steve W.
- Subjects
GRAIN size ,GRAVEL ,TOPOGRAPHY ,POINT cloud ,DRONE aircraft ,SPATIAL resolution - Abstract
Grain size assessments are necessary for understanding the various geomorphological, hydrological and ecological processes that occur within rivers. Recent research has shown that the application of Structure‐from‐Motion (SfM) photogrammetry to imagery from uncrewed aerial vehicles (UAVs) shows promise for rapidly characterising grain sizes along rivers in comparison to traditional field‐based methods. Here, we evaluated the applicability of different methods for estimating grain sizes in gravel bars along a study reach in the Olentangy River in Columbus, Ohio. We collected imagery of these gravel bars with a UAV and processed those images with SfM photogrammetry software to produce three‐dimensional point clouds and orthomosaics. Our evaluation compared statistical models calibrated on topographic roughness, which was computed from the point clouds, and to those based on image texture, which was computed from the orthomosaics. Our results showed that statistical models calibrated on image texture were more accurate than those based on topographic roughness. This might be because of site‐specific patterns of grain size, shape and imbrication. Such patterns would have complicated the detection of topographic signatures associated with individual grains. Our work illustrates that UAV‐SfM approaches show potential to be used as an accessible method for characterising surface grain sizes along rivers at higher spatial and temporal resolutions than those provided by traditional methods. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Thermocatalytic Plasma-Assisted Dry Reforming of Methane Over Ni/Al2O3 Catalyst
- Author
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Wong, Tyler and Wong, Tyler
- Published
- 2023
6. Decorative Crosswalks: Promoting Creativity in Urban Landscapes.
- Author
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GREEN, JOSHUA and WONG, TYLER
- Abstract
The article discusses the concept of decorative crosswalks as a creative urban design element. It is reported that these crosswalks feature colorful patterns or artistic murals, adding vibrancy to city streets and fostering a sense of community pride. It also highlights safety benefits, including reduced crash rates and increased driver awareness.
- Published
- 2023
7. A global metagenomic map of urban microbiomes and antimicrobial resistance
- Author
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Danko, David, primary, Bezdan, Daniela, additional, Afshin, Evan E., additional, Ahsanuddin, Sofia, additional, Bhattacharya, Chandrima, additional, Butler, Daniel J., additional, Chng, Kern Rei, additional, Donnellan, Daisy, additional, Hecht, Jochen, additional, Jackson, Katelyn, additional, Kuchin, Katerina, additional, Karasikov, Mikhail, additional, Lyons, Abigail, additional, Mak, Lauren, additional, Meleshko, Dmitry, additional, Mustafa, Harun, additional, Mutai, Beth, additional, Neches, Russell Y., additional, Ng, Amanda, additional, Nikolayeva, Olga, additional, Nikolayeva, Tatyana, additional, Png, Eileen, additional, Ryon, Krista A., additional, Sanchez, Jorge L., additional, Shaaban, Heba, additional, Sierra, Maria A., additional, Thomas, Dominique, additional, Young, Ben, additional, Abudayyeh, Omar O., additional, Alicea, Josue, additional, Bhattacharyya, Malay, additional, Blekhman, Ran, additional, Castro-Nallar, Eduardo, additional, Cañas, Ana M., additional, Chatziefthimiou, Aspassia D., additional, Crawford, Robert W., additional, De Filippis, Francesca, additional, Deng, Youping, additional, Desnues, Christelle, additional, Dias-Neto, Emmanuel, additional, Dybwad, Marius, additional, Elhaik, Eran, additional, Ercolini, Danilo, additional, Frolova, Alina, additional, Gankin, Dennis, additional, Gootenberg, Jonathan S., additional, Graf, Alexandra B., additional, Green, David C., additional, Hajirasouliha, Iman, additional, Hastings, Jaden J.A., additional, Hernandez, Mark, additional, Iraola, Gregorio, additional, Jang, Soojin, additional, Kahles, Andre, additional, Kelly, Frank J., additional, Knights, Kaymisha, additional, Kyrpides, Nikos C., additional, Łabaj, Paweł P., additional, Lee, Patrick K.H., additional, Leung, Marcus H.Y., additional, Ljungdahl, Per O., additional, Mason-Buck, Gabriella, additional, McGrath, Ken, additional, Meydan, Cem, additional, Mongodin, Emmanuel F., additional, Moraes, Milton Ozorio, additional, Nagarajan, Niranjan, additional, Nieto-Caballero, Marina, additional, Noushmehr, Houtan, additional, Oliveira, Manuela, additional, Ossowski, Stephan, additional, Osuolale, Olayinka O., additional, Özcan, Orhan, additional, Paez-Espino, David, additional, Rascovan, Nicolás, additional, Richard, Hugues, additional, Rätsch, Gunnar, additional, Schriml, Lynn M., additional, Semmler, Torsten, additional, Sezerman, Osman U., additional, Shi, Leming, additional, Shi, Tieliu, additional, Siam, Rania, additional, Song, Le Huu, additional, Suzuki, Haruo, additional, Court, Denise Syndercombe, additional, Tighe, Scott W., additional, Tong, Xinzhao, additional, Udekwu, Klas I., additional, Ugalde, Juan A., additional, Valentine, Brandon, additional, Vassilev, Dimitar I., additional, Vayndorf, Elena M., additional, Velavan, Thirumalaisamy P., additional, Wu, Jun, additional, Zambrano, María M., additional, Zhu, Jifeng, additional, Zhu, Sibo, additional, Mason, Christopher E., additional, Abdullah, Natasha, additional, Abraao, Marcos, additional, Adel, Ait-hamlat, additional, Afaq, Muhammad, additional, Al-Quaddoomi, Faisal S., additional, Alam, Ireen, additional, Albuquerque, Gabriela E., additional, Alexiev, Alex, additional, Ali, Kalyn, additional, Alvarado-Arnez, Lucia E., additional, Aly, Sarh, additional, Amachee, Jennifer, additional, Amorim, Maria G., additional, Ampadu, Majelia, additional, Amran, Muhammad Al-Fath, additional, An, Nala, additional, Andrew, Watson, additional, Andrianjakarivony, Harilanto, additional, Angelov, Michael, additional, Antelo, Verónica, additional, Aquino, Catharine, additional, Aranguren, Álvaro, additional, Araujo, Luiza F., additional, Vasquez Arevalo, Hitler Francois, additional, Arevalo, Jenny, additional, Arnan, Carme, additional, Alvarado Arnez, Lucia Elena, additional, Arredondo, Fernanda, additional, Arthur, Matthew, additional, Asenjo, Freddy, additional, Aung, Thomas Saw, additional, Auvinet, Juliette, additional, Aventin, Nuria, additional, Ayaz, Sadaf, additional, Baburyan, Silva, additional, Bakere, Abd-Manaaf, additional, Bakhl, Katrin, additional, Bartelli, Thais F., additional, Batdelger, Erdenetsetseg, additional, Baudon, François, additional, Becher, Kevin, additional, Bello, Carla, additional, Benchouaia, Médine, additional, Benisty, Hannah, additional, Benoiston, Anne-Sophie, additional, Benson, Joseph, additional, Benítez, Diego, additional, Bernardes, Juliana, additional, Bertrand, Denis, additional, Beurmann, Silvia, additional, Bitard-Feildel, Tristan, additional, Bittner, Lucie, additional, Black, Christina, additional, Blanc, Guillaume, additional, Blyther, Brittany, additional, Bode, Toni, additional, Boeri, Julia, additional, Boldgiv, Bazartseren, additional, Bolzli, Kevin, additional, Bordigoni, Alexia, additional, Borrelli, Ciro, additional, Bouchard, Sonia, additional, Bouly, Jean-Pierre, additional, Boyd, Alicia, additional, Branco, Gabriela P., additional, Breschi, Alessandra, additional, Brindefalk, Björn, additional, Brion, Christian, additional, Briones, Alan, additional, Buczansla, Paulina, additional, Burke, Catherine M., additional, Burrell, Aszia, additional, Butova, Alina, additional, Buttar, Irvind, additional, Bynoe, Jalia, additional, Bönigk, Sven, additional, Bøifot, Kari O., additional, Caballero, Hiram, additional, Cai, Xiao Wen, additional, Calderon, Dayana, additional, Cantillo, Angela, additional, Carbajo, Miguel, additional, Carbone, Alessandra, additional, Cardenas, Anais, additional, Carrillo, Katerine, additional, Casalot, Laurie, additional, Castro, Sofia, additional, Castro, Ana V., additional, Castro, Astred, additional, Castro, Ana Valeria B., additional, Cawthorne, Simone, additional, Cedillo, Jonathan, additional, Chaker, Salama, additional, Chalangal, Jasna, additional, Chan, Allison, additional, Chasapi, Anastasia I., additional, Chatziefthimiou, Starr, additional, Chaudhuri, Sreya Ray, additional, Chavan, Akash Keluth, additional, Chavez, Francisco, additional, Chem, Gregory, additional, Chen, Xiaoqing, additional, Chen, Michelle, additional, Chen, Jenn-Wei, additional, Chernomoretz, Ariel, additional, Chettouh, Allaeddine, additional, Cheung, Daisy, additional, Chicas, Diana, additional, Chiu, Shirley, additional, Choudhry, Hira, additional, Chrispin, Carl, additional, Ciaramella, Kianna, additional, Cifuentes, Erika, additional, Cohen, Jake, additional, Coil, David A., additional, Collin, Sylvie, additional, Conger, Colleen, additional, Conte, Romain, additional, Corsi, Flavia, additional, Cossio, Cecilia N., additional, Costa, Ana F., additional, Cuebas, Delisia, additional, D’Alessandro, Bruno, additional, Dahlhausen, Katherine E., additional, Darling, Aaron E., additional, Das, Pujita, additional, Davenport, Lucinda B., additional, David, Laurent, additional, Davidson, Natalie R., additional, Dayama, Gargi, additional, Delmas, Stéphane, additional, Deng, Chris K., additional, Dequeker, Chloé, additional, Desert, Alexandre, additional, Devi, Monika, additional, Dezem, Felipe S., additional, Dias, Clara N., additional, Donahoe, Timothy Ryan, additional, Dorado, Sonia, additional, Dorsey, LaShonda, additional, Dotsenko, Valeriia, additional, Du, Steven, additional, Dutan, Alexandra, additional, Eady, Naya, additional, Eisen, Jonathan A., additional, Elaskandrany, Miar, additional, Epping, Lennard, additional, Escalera-Antezana, Juan P., additional, Ettinger, Cassie L., additional, Faiz, Iqra, additional, Fan, Luice, additional, Farhat, Nadine, additional, Faure, Emile, additional, Fauzi, Fazlina, additional, Feigin, Charlie, additional, Felice, Skye, additional, Ferreira, Laís Pereira, additional, Figueroa, Gabriel, additional, Fleiss, Aubin, additional, Flores, Denisse, additional, Velasco Flores, Jhovana L., additional, Fonseca, Marcos A.S., additional, Foox, Jonathan, additional, Forero, Juan Carlos, additional, Francis, Aaishah, additional, French, Kelly, additional, Fresia, Pablo, additional, Friedman, Jacob, additional, Fuentes, Jaime J., additional, Galipon, Josephine, additional, Garcia, Mathilde, additional, Garcia, Laura, additional, García, Catalina, additional, Geiger, Annie, additional, Gerner, Samuel M., additional, Ghose, Sonia L., additional, Giang, Dao Phuong, additional, Giménez, Matías, additional, Giovannelli, Donato, additional, Githae, Dedan, additional, Gkotzis, Spyridon, additional, Godoy, Liliana, additional, Goldman, Samantha, additional, Gonnet, Gaston H., additional, Gonzalez, Juana, additional, Gonzalez, Andrea, additional, Gonzalez-Poblete, Camila, additional, Gray, Andrew, additional, Gregory, Tranette, additional, Greselle, Charlotte, additional, Guasco, Sophie, additional, Guerra, Juan, additional, Gurianova, Nika, additional, Haehr, Wolfgang, additional, Halary, Sebastien, additional, Hartkopf, Felix, additional, Hawkins-Zafarnia, Arya, additional, Hazrin-Chong, Nur Hazlin, additional, Helfrich, Eric, additional, Hell, Eva, additional, Henry, Tamera, additional, Hernandez, Samuel, additional, Hernandez, Pilar Lopez, additional, Hess-Homeier, David, additional, Hittle, Lauren E., additional, Hoan, Nghiem Xuan, additional, Holik, Aliaksei, additional, Homma, Chiaki, additional, Hoxie, Irene, additional, Huber, Michael, additional, Humphries, Elizabeth, additional, Hyland, Stephanie, additional, Hässig, Andrea, additional, Häusler, Roland, additional, Hüsser, Nathalie, additional, Petit, Robert A., additional, Iderzorig, Badamnyambuu, additional, Igarashi, Mizuki, additional, Iqbal, Shaikh B., additional, Ishikawa, Shino, additional, Ishizuka, Sakura, additional, Islam, Sharah, additional, Islam, Riham, additional, Ito, Kohei, additional, Ito, Sota, additional, Ito, Takayuki, additional, Ivankovic, Tomislav, additional, Iwashiro, Tomoki, additional, Jackson, Sarah, additional, Jacobs, JoAnn, additional, James, Marisano, additional, Jaubert, Marianne, additional, Jerier, Marie-Laure, additional, Jiminez, Esmeralda, additional, Jinfessa, Ayantu, additional, De Jong, Ymke, additional, Joo, Hyun Woo, additional, Jospin, Guilllaume, additional, Kajita, Takema, additional, Ahmad Kassim, Affifah Saadah, additional, Kato, Nao, additional, Kaur, Amrit, additional, Kaur, Inderjit, additional, de Souza Gomes Kehdy, Fernanda, additional, Khadka, Vedbar S., additional, Khan, Shaira, additional, Khavari, Mahshid, additional, Ki, Michelle, additional, Kim, Gina, additional, Kim, Hyung Jun, additional, Kim, Sangwan, additional, King, Ryan J., additional, KoLoMonaco, Giuseppe, additional, Koag, Ellen, additional, Kobko-Litskevitch, Nadezhda, additional, Korshevniuk, Maryna, additional, Kozhar, Michael, additional, Krebs, Jonas, additional, Kubota, Nanami, additional, Kuklin, Andrii, additional, Kumar, Sheelta S., additional, Kwong, Rachel, additional, Kwong, Lawrence, additional, Lafontaine, Ingrid, additional, Lago, Juliana, additional, Lai, Tsoi Ying, additional, Laine, Elodie, additional, Laiola, Manolo, additional, Lakhneko, Olha, additional, Lamba, Isha, additional, de Lamotte, Gerardo, additional, Lannes, Romain, additional, De Lazzari, Eleonora, additional, Leahy, Madeline, additional, Lee, Hyunjung, additional, Lee, Yunmi, additional, Lee, Lucy, additional, Lemaire, Vincent, additional, Leong, Emily, additional, Lewandowska, Dagmara, additional, Li, Chenhao, additional, Liang, Weijun, additional, Lin, Moses, additional, Lisboa, Priscilla, additional, Litskevitch, Anna, additional, Liu, Eric Minwei, additional, Liu, Tracy, additional, Livia, Mayra Arauco, additional, Lo, Yui Him, additional, Losim, Sonia, additional, Loubens, Manon, additional, Lu, Jennifer, additional, Lykhenko, Olexandr, additional, Lysakova, Simona, additional, Mahmoud, Salah, additional, Majid, Sara Abdul, additional, Makogon, Natalka, additional, Maldonado, Denisse, additional, Mallari, Krizzy, additional, Malta, Tathiane M., additional, Mamun, Maliha, additional, Manoir, Dimitri, additional, Marchandon, German, additional, Marciniak, Natalia, additional, Marinovic, Sonia, additional, Marques, Brunna, additional, Mathews, Nicole, additional, Matsuzaki, Yuri, additional, Matthys, Vincent, additional, May, Madelyn, additional, McComb, Elias, additional, Meagher, Annabelle, additional, Melamed, Adiell, additional, Menary, Wayne, additional, Mendez, Katterinne N., additional, Mendez, Ambar, additional, Mendy, Irène Mauricette, additional, Meng, Irene, additional, Menon, Ajay, additional, Menor, Mark, additional, Meoded, Roy, additional, Merino, Nancy, additional, Miah, Karishma, additional, Mignotte, Mathilde, additional, Miketic, Tanja, additional, Miranda, Wilson, additional, Mitsios, Athena, additional, Miura, Ryusei, additional, Miyake, Kunihiko, additional, Moccia, Maria D., additional, Mohan, Natasha, additional, Mohsin, Mohammed, additional, Moitra, Karobi, additional, Moldes, Mauricio, additional, Molina, Laura, additional, Molinet, Jennifer, additional, Molomjamts, Orgil-Erdene, additional, Moniruzzaman, Eftar, additional, Moon, Sookwon, additional, de Oliveira Moraes, Isabelle, additional, Moreno, Mario, additional, Mosella, Maritza S., additional, Moser, Josef W., additional, Mozsary, Christopher, additional, Muehlbauer, Amanda L., additional, Muner, Oasima, additional, Munia, Muntaha, additional, Munim, Naimah, additional, Muscat, Maureen, additional, Mustac, Tatjana, additional, Muñoz, Cristina, additional, Nadalin, Francesca, additional, Naeem, Areeg, additional, Nagy-Szakal, Dorottya, additional, Nakagawa, Mayuko, additional, Narce, Ashanti, additional, Nasu, Masaki, additional, Navarrete, Irene González, additional, Naveed, Hiba, additional, Nazario, Bryan, additional, Nedunuri, Narasimha Rao, additional, Neff, Thomas, additional, Nesimi, Aida, additional, Ng, Wan Chiew, additional, Ng, Synti, additional, Nguyen, Gloria, additional, Ngwa, Elsy, additional, Nicolas, Agier, additional, Nicolas, Pierre, additional, Nika, Abdollahi, additional, Noorzi, Hosna, additional, Nosrati, Avigdor, additional, Nunes, Diana N., additional, O’Brien, Kathryn, additional, O’Hara, Niamh B., additional, Oken, Gabriella, additional, Olawoyin, Rantimi A., additional, Oliete, Javier Quilez, additional, Olmeda, Kiara, additional, Oluwadare, Tolulope, additional, Oluwadare, Itunu A., additional, Ordioni, Nils, additional, Orpilla, Jenessa, additional, Orrego, Jacqueline, additional, Ortega, Melissa, additional, Osma, Princess, additional, Osuolale, Israel O., additional, Osuolale, Oluwatosin M., additional, Ota, Mitsuki, additional, Oteri, Francesco, additional, Oto, Yuya, additional, Ounit, Rachid, additional, Ouzounis, Christos A., additional, Pakrashi, Subhamitra, additional, Paras, Rachel, additional, Pardo-Este, Coral, additional, Park, Young-Ja, additional, Pastuszek, Paulina, additional, Patel, Suraj, additional, Pathmanathan, Jananan, additional, Patrignani, Andrea, additional, Perez, Manuel, additional, Peros, Ante, additional, Persaud, Sabrina, additional, Peters, Anisia, additional, Phillips, Adam, additional, Pineda, Lisbeth, additional, Pizzi, Melissa P., additional, Plaku, Alma, additional, Plaku, Alketa, additional, Pompa-Hogan, Brianna, additional, Portilla, María Gabriela, additional, Posada, Leonardo, additional, Priestman, Max, additional, Prithiviraj, Bharath, additional, Priya, Sambhawa, additional, Pugdeethosal, Phanthira, additional, Pugh, Catherine E., additional, Pulatov, Benjamin, additional, Pupiec, Angelika, additional, Pyrshev, Kyrylo, additional, Qing, Tao, additional, Rahiel, Saher, additional, Rahmatulloev, Savlatjon, additional, Rajendran, Kannan, additional, Ramcharan, Aneisa, additional, Ramirez-Rojas, Adan, additional, Rana, Shahryar, additional, Ratnanandan, Prashanthi, additional, Read, Timothy D., additional, Rehrauer, Hubert, additional, Richer, Renee, additional, Rivera, Alexis, additional, Rivera, Michelle, additional, Robertiello, Alessandro, additional, Robinson, Courtney, additional, Rodríguez, Paula, additional, Rojas, Nayra Aguilar, additional, Roldán, Paul, additional, Rosario, Anyelic, additional, Roth, Sandra, additional, Ruiz, Maria, additional, Boja Ruiz, Stephen Eduard, additional, Russell, Kaitlan, additional, Rybak, Mariia, additional, Sabedot, Thais S., additional, Sabina, Mahfuza, additional, Saito, Ikuto, additional, Saito, Yoshitaka, additional, Malca Salas, Gustavo Adolfo, additional, Salazar, Cecilia, additional, San, Kaung Myat, additional, Sanchez, Jorge, additional, Sanchir, Khaliun, additional, Sankar, Ryan, additional, de Souza Santos, Paulo Thiago, additional, Saravi, Zulena, additional, Sasaki, Kai, additional, Sato, Yuma, additional, Sato, Masaki, additional, Sato, Seisuke, additional, Sato, Ryo, additional, Sato, Kaisei, additional, Sayara, Nowshin, additional, Schaaf, Steffen, additional, Schacher, Oli, additional, Schinke, Anna-Lena M., additional, Schlapbach, Ralph, additional, Schori, Christian, additional, Schriml, Jason R., additional, Segato, Felipe, additional, Sepulveda, Felipe, additional, Serpa, Marianna S., additional, De Sessions, Paola F., additional, Severyn, Juan C., additional, Shakil, Maheen, additional, Shalaby, Sarah, additional, Shari, Aliyah, additional, Shim, Hyenah, additional, Shirahata, Hikaru, additional, Shiwa, Yuh, additional, Da Silva, Ophélie, additional, Silva, Jordana M., additional, Simon, Gwenola, additional, Singh, Shaleni K., additional, Sluzek, Kasia, additional, Smith, Rebecca, additional, So, Eunice, additional, Andreu Somavilla, Núria, additional, Sonohara, Yuya, additional, Rufino de Sousa, Nuno, additional, Souza, Camila, additional, Sperry, Jason, additional, Sprinsky, Nicolas, additional, Stark, Stefan G., additional, La Storia, Antonietta, additional, Suganuma, Kiyoshi, additional, Suliman, Hamood, additional, Sullivan, Jill, additional, Supie, Arif Asyraf Md, additional, Suzuki, Chisato, additional, Takagi, Sora, additional, Takahara, Fumie, additional, Takahashi, Naoya, additional, Takahashi, Kou, additional, Takeda, Tomoki, additional, Takenaka, Isabella K., additional, Tanaka, Soma, additional, Tang, Anyi, additional, Man Tang, Yuk, additional, Tarcitano, Emilio, additional, Tassinari, Andrea, additional, Taye, Mahdi, additional, Terrero, Alexis, additional, Thambiraja, Eunice, additional, Thiébaut, Antonin, additional, Thomas, Sade, additional, Thomas, Andrew M., additional, Togashi, Yuto, additional, Togashi, Takumi, additional, Tomaselli, Anna, additional, Tomita, Masaru, additional, Tomita, Itsuki, additional, Toth, Oliver, additional, Toussaint, Nora C., additional, Tran, Jennifer M., additional, Truong, Catalina, additional, Tsonev, Stefan I., additional, Tsuda, Kazutoshi, additional, Tsurumaki, Takafumi, additional, Tuz, Michelle, additional, Tymoshenko, Yelyzaveta, additional, Urgiles, Carmen, additional, Usui, Mariko, additional, Vacant, Sophie, additional, Vann, Laura E., additional, Velter, Fabienne, additional, Ventorino, Valeria, additional, Vera-Wolf, Patricia, additional, Vicedomini, Riccardo, additional, Suarez-Villamil, Michael A., additional, Vincent, Sierra, additional, Vivancos-Koopman, Renee, additional, Wan, Andrew, additional, Wang, Cindy, additional, Warashina, Tomoro, additional, Watanabe, Ayuki, additional, Weekes, Samuel, additional, Werner, Johannes, additional, Westfall, David, additional, Wieler, Lothar H., additional, Williams, Michelle, additional, Wolf, Silver A., additional, Wong, Brian, additional, Wong, Yan Ling, additional, Wong, Tyler, additional, Wright, Rasheena, additional, Wunderlin, Tina, additional, Yamanaka, Ryota, additional, Yang, Jingcheng, additional, Yano, Hirokazu, additional, Yeh, George C., additional, Yemets, Olena, additional, Yeskova, Tetiana, additional, Yoshikawa, Shusei, additional, Zafar, Laraib, additional, Zhang, Yang, additional, Zhang, Shu, additional, Zhang, Amy, additional, Zheng, Yuanting, additional, and Zubenko, Stas, additional
- Published
- 2021
- Full Text
- View/download PDF
8. Estimation of grain sizes in a river through UAV-based SfM photogrammetry
- Author
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Wong, Tyler
- Subjects
- Geomorphology, Environmental Science, Geology, Hydrology, Hydrologic Sciences, Water Resource Management, Fluvial geomorphology, hydrology, grain size estimation, Unmanned Aerial Vehicles, UAVs, drones, remote sensing
- Abstract
Unmanned aerial vehicles (UAVs) have an increasingly relevant role in the field of hydrology and water resources management. Their affordability and ease of use in comparison to traditional field-based methods have made research on their applications increase rapidly in the past decade. One application of UAVs to the hydrology of river systems is the estimation of particle sizes within a channel. This project investigated the ability of UAV imagery and Structure-from-Motion (SfM) photogrammetry to estimate grain-size distributions within a reach along the Olentangy River. To do this, we selected a study reach within the Highbanks Metro Park that was approximately 250 m in length and 50 m in width. We flew a DJI Mavic 2 Pro quadcopter UAV and collected imagery of subaerially exposed grains throughout gravels bars within this study reach. These images were processed using a SfM workflow that yielded point clouds and orthomosaics from which we extracted multiple topography-based and image-based metrics to be used as proxies for grain sizes. We then calibrated statistical regression models to predict the D50 and D84 grain size percentiles from these grain size proxies. While previous literature has suggested that topographic roughness metrics outperform image textural metrics for statistical grain size estimation, our study showed that the statistical models that were calibrated based on image textural properties performed better than those that were calibrated based on point cloud roughness properties. This contradiction may reflect the unique nature of our study site where the grains were dominated by smaller particles in comparison to other studies. The smaller grain sizes in our study area would have likely produced less significant topographic signatures in comparison to larger grains, which makes topographic roughness difficult to accurately measure and apply to statistical grain size estimation techniques. The results of this study suggest that topography-based grain size estimation may not be adequate for all sites, and further work on analyzing the range of grain size characteristics for which topography-based and image-based techniques perform better should be done to improve the applicability of these techniques. Doing so will help river scientists and managers to easily assess the physical, chemical, and biological dynamics that occur within rivers.
- Published
- 2022
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