Gubash Azhikodan
@tmu.ac.jp
Assistant Professor, Department of Civil and Environmental Engineering, Faculty of Urban Environmental Sciences
Tokyo Metropolitan University
EDUCATION
Ph. D. in Engineering, Tokyo Metropolitan University, Japan
M. Tech in Water Management, IIT Kharagpur, India
B. Tech in Agricultural Engineering, Kerala Agricultural University, India
RESEARCH, TEACHING, or OTHER INTERESTS
Environmental Science, Aquatic Science, Civil and Structural Engineering, Oceanography
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
K.L. Priya, Gubash Azhikodan, Katsuhide Yokoyama, and K.R. Renjith
Elsevier BV
Nay Oo Hlaing, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Nay Oo Hlaing, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Lett Wai Nwe, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Ghazaleh Kheiri, Ronnel Pabalan, Maurice A. Duka, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Vishal Singh Rawat, Ryunosuke Fujikawa, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
K. Vidyalashmi, Megha Chandana L, J.S. Nandana, Gubash Azhikodan, K L Priya, Katsuhide Yokoyama, and Suresh Kumar Paramasivam
Elsevier BV
Nay Oo HLAING, Gubash AZHIKODAN, and Katsuhide YOKOYAMA
Japan Society of Civil Engineers
Pan Ei PHYU, Gubash AZHIKODAN, and Katsuhide YOKOYAMA
Japan Society of Civil Engineers
Pan Ei Phyu, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Megha R. Raj, K. Krishna Priya, N. Hisana, Keerthy Remesh, K. L. Priya, S. Haddout, K. R. Renjith, and Gubash Azhikodan
Springer Nature Switzerland
Megha R. Raj, K. Krishnapriya, N. Hisana, K. L. Priya, and Gubash Azhikodan
Springer Nature Singapore
Lett Wai Nwe, Katsuhide Yokoyama, and Gubash Azhikodan
Elsevier BV
Gubash Azhikodan, Nay Oo Hlaing, Katsuhide Yokoyama, and Masashi Kodama
Elsevier BV
Kirana Somsook, Gubash Azhikodan, Maurice A. Duka, and Katsuhide Yokoyama
Elsevier BV
Lett Wai Nwe, Gubash Azhikodan, Katsuhide Yokoyama, and Masashi Kodama
Elsevier BV
Gubash Azhikodan and Katsuhide Yokoyama
Elsevier BV
Joan Cecilia Casila, Gubash Azhikodan, and Katsuhide Yokoyama
Elsevier BV
Saritha Padiyedath Gopalan, Akira Kawamura, Hideo Amaguchi, and Gubash Azhikodan
Springer Science and Business Media LLC
Nagendram Veerapaga, Tetsuya Shintani, Gubash Azhikodan, and Katsuhide Yokoyama
Springer Singapore
In order to discuss the variation of salinity intrusion and mixing types in terms of estuary length, width, depth, and bathymetry, a total of 31 numerical experiments were carried out with a conceptual estuary by using a three-dimensional hydrodynamic simulator, Fantom-Refined. Since sand bars are formed in a river channel, and cyclic variation of the river bed height is found in longitudinal direction, sinusoidal wavy shapes were considered for rough bottom cases to represent the river bed with four different wave amplitudes (0.1, 0.2, 0.3 and 0.4 m) and wavelengths (350, 700, 1400 and 2800 m). In the cases of constant tidal range and discharge with the flat bottom, salinity intrusion length was decreased with increase in estuary length, and mixing condition was changed from salt wedge to well mixed type. On the other hand, salinity intrusion length was increased with increase in width of the channel under constant discharge. Further, the salinity mixing condition was changed from well mixed to salt wedge with the increase in depth of the channel. The salinity intrusion length was increased in the case of funnel shaped estuary when compared with the rectangular shaped estuary. Wavy bottom of the channel had less intrusion length compared with the flat bottom of the constant tidal range and discharge as the bottom friction reduced the velocity of the gravitational flow as well as enhanced vertical mixing. For the constant wavelength, the salinity intrusion length was decreased with increase in wave amplitude. On the other hand, for constant wave amplitude, the salinity intrusion length was increased with increase in wavelength.
Gubash Azhikodan, Kirana Somsook, and Katsuhide Yokoyama
Springer Singapore
Saritha Padiyedath Gopalan, Akira Kawamura, Hideo Amaguchi, Tadakatsu Takasaki, and Gubash Azhikodan
Elsevier BV
Gubash Azhikodan and Katsuhide Yokoyama
Elsevier BV
Nagendram Veerapaga, Gubash Azhikodan, Tetsuya Shintani, Naoya Iwamoto, and Katsuhide Yokoyama
Elsevier BV
RECENT SCHOLAR PUBLICATIONS
MOST CITED SCHOLAR PUBLICATIONS
GRANT DETAILS
1. PI of the sponsored project entitled “Analysis of Morphodynamic Evolution in a Meandering Estuarine Channel in the Context of Climate Change”, Japan Society for the Promotion of Science (JSPS), 4,160,000 JPY, 04/2020-03/2024.
2. PI of the sponsored project entitled "Comparative study of hydrodynamic processes in large and small estuaries", Tokyo Metropolitan University Grant-in-Aid for Scientific Research Challenge Support (Basic Research - B), 2,000,000 JPY, 04/2024-03/2025.
3. Co-PI of the sponsored project entitled “Prevention of water pollution caused by the floating waste disposal from megacities in the context of global warming and COVID-19 lockdowns”, Tokyo Metropolitan Government (TMG), 45,000,000 JPY, 04/2022-03/2025. Co-investigators (Katsuhide Yokoyama (PI), Yoshiyuki Imamura, Masayuki Kawahigashi, Yasuhiro Arai, Hiroshi Sakai, Tetsuya Shintani, Hideo Amaguchi).
4. PI of the sponsored project entitled “International comparative study on hydrodynamic processes in Asian estuaries”, Tokyo Metropolitan University (Promotion of Internationalization), 800,000 JPY, 04/2023-03/2024.
5. PI of the sponsored project entitled “International comparative study on hydrodynamic processes in Asian estuaries”, Tokyo Metropolitan University (Promotion of Internationalization), 600,000 JPY, 04/2022-03/2023.