KAWAI Takayuki

写真a

Affiliation

Graduate School of International Resource Sciences 

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Research Interests 【 display / non-display 】

  • 地下水

  • 水文水資源

  • 自然地理

  • 水文地質

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Graduating School 【 display / non-display 】

  • 　
    -
    1999.03

    Hosei University   Faculty of Literature   Graduated

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Graduate School 【 display / non-display 】

  • 　
    -
    2006.03

    Tottori University  Graduate School, Division of Agricltural Sciences  Doctor's Degree Program  Completed

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Campus Career 【 display / non-display 】

  • 2021.12
    -
    Now

    Akita University   Graduate School of International Resource Sciences   Associate Professor  

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • Water level change of Lake Tana, source of the Blue Nile: Prediction using teleconnections with sea surface temperatures

    Yasuda H.

    Journal of Great Lakes Research ( Journal of Great Lakes Research )  48 ( 2 ) 468 - 477   2022.04  [Refereed]

    Research paper (journal)   International Co-author

    Water level change of Lake Tana, the source of the Blue Nile was analyzed. Correlations between the water level change and global sea surface temperature (GSST) were calculated and teleconnections were found. Prediction of water level was performed using a recurrent artificial neural network model. First, the seasonal change of water level was divided into three phases, the rising, recession 1, and recession 2 phases. The water level increased during the rising phase, decreased rapidly during the recession 1 phase, and decreased at a uniform rate during the recession 2 phase. To find teleconnections of the water level change in the rising phase with GSST, correlations between the level change and GSST were calculated. Sea regions on the Pacific Ocean indicated significant correlations with the level change at lag 0–1 month and lag 6–7 months. There was a strongly correlated sea zone over the western Pacific Ocean at time lags of 6–7 months. To predict water level change, SST time series of the correlated zone was applied to a recurrent neural network model. Predictions of changes of the rise of the water level of Lake Tana during the rainy season from teleconnections with SSTs via the neural network model simulated the observed changes well (r = 0.795). Prediction of the changes of Lake Tana's water level with a lead time of 6–7 months can greatly facilitate management of the lake's water resources.

    DOI

  • Teleconnection of rainfall time series in the central Nile Basin with sea surface temperature

    Yasuda H.

    Paddy and Water Environment ( Paddy and Water Environment )  16 ( 4 ) 805 - 821   2018.10  [Refereed]

    Research paper (journal)   International Co-author

    DOI

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    ◆Other【 display / non-display 】

  • Construction of Virtual Reality Space of the Tottori Sand Dunes using UAVs

    SAITO Tadaomi, KAWAI Takayuki, OKASHITA Kisumi, INOSAKO Koji

    沙漠研究   32 ( S )   2022

    J-GLOBAL

  • Investigation of groundwater distribution using a ground penetrating radar in the Tottori sand dunes

    齊藤忠臣, 河合隆行, 西本貴之, 猪迫耕二, 安田裕, 塩崎一郎

    応用水文   33 ( 33 ) 51 - 60   2021.03

    J-GLOBAL

  • Land susceptibility to water and wind erosion risks in the East Africa region

    Fenta A. A, Tsunekawa A, Haregeweyn N, Poesen J, Tsubo M, Borrelli P, Panagos P, Vanmaercke M, Broeckx J, Yasuda H, Kawai T, Kurosaki Y

    Science of The Total Environment   703   135016   2020.02

    DOI

  • Prediction of summer rainfall over the source region of the Blue Nile by using teleconnections based on sea surface temperatures

    Alhamshry Asmaa, Fenta Ayele Almaw, Yasuda Hiroshi, Shimizu Katsuyuki, Kawai Takayuki

    THEORETICAL AND APPLIED CLIMATOLOGY   137 ( 3-4 ) 3077 - 3087   2019.08

    DOI

  • Teleconnection of rainfall time series in the central Nile Basin with sea surface temperature

    Yasuda H, S. N, Pandaa, Mohamed, A. M. Abd Elbasitc, T. Kawai, T. Elgamrie, A. A. Fenta, H. Nawata

    Paddy and Water Environment   16   805 - 821   2018.08

    • display all >>

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Grant-in-Aid for Scientific Research 【 display / non-display 】

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Presentations 【 display / non-display 】

  • Influence of polacrylamede application on structure stability of Ethiopian soils

    Fujimaki H, Kawai T, Mamedov A.L

    10th International congress on the Soil resources and environment conservation  2018.10  -  2018.10 

  • Aerial photogrammetry and three-dimensional modeling of the Tottori sand dune using UAV

    Saito, T, Kawai, T, Inosako, K, Yasuda, H

    Desert Technology 13 International Conference  2018.03  -  2018.03 

  • Estimation of hydrogeological structure combining groundwater-aeration-sound, ground-penetrating- radar and resistivity tomography in semi-arid area

    Takayuki Kawai, Motoyuki Sato, Yasuyuki Tada, Ryota Tsuchiya, Yuki Morinaga, Masato Shinoda, Seiichirou Kuroda, Hiroshi Yasuda

    Desert Technology 13 International Conference  2018.03  -  2018.03 

  • NMR and GPR sounding to characterize groundwater aquifer in sand dunes area

    Chisato Konishi, Kunio Aoike, Takayuki Kawai, Seiichiro Kuroda

    Symposium on the Application of Geophysics to Engineering and Environmental Problems 2017  2017.03  -  2017.03 

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