Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Katsuaki Komai"'
Publikováno v:
Hydrology, Vol 11, Iss 11, p 192 (2024)
Suspended sediment (SS) has a wide range of negative effects such as increased water turbidity, altered habitat structures, sedimentation, and effects on hydraulic systems and environmental engineering projects. Nevertheless, the methods for accurate
Externí odkaz:
https://doaj.org/article/25c139368c014890829e82c425afb786
Autor:
Keisuke Nakayama, Katsuaki Komai, Motoshi Amano, Shintarou Horii, Yuichiro Somiya, Etsuko Kumamoto, Yoichi Oyama
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract Aegagropila linnaei is a filamentous green algal species that often forms beautiful spherical shapes called "lake balls" or "Marimo". A. linnaei were once globally distributed around the world, but the population has been declining for sever
Externí odkaz:
https://doaj.org/article/0f91a3e430694f868f7a774ba66049f2
Carbon dioxide uptake in a eutrophic stratified reservoir: Freshwater carbon sequestration potential
Autor:
Jinichi Sakaguchi, Keisuke Nakayama, Katsuaki Komai, Atsushi Kubo, Taketoshi Shimizu, Junpei Omori, Kohji Uno, Tomoyasu Fujii
Publikováno v:
Heliyon, Vol 9, Iss 10, Pp e20322- (2023)
Carbon capture and storage due to photosynthesis activities has been proposed as a carbon sink to mitigate climate change. To enhance such mitigation, previous studies have shown that freshwater lakes should be included in the carbon sink, since they
Externí odkaz:
https://doaj.org/article/00037ff91cf3418db94c8d3f6d9407ba
Autor:
Keisuke Nakayama, Katsuaki Komai, Keisuke Ogata, Toshiro Yamada, Yukinobu Sato, Fumiya Sano, Shintarou Horii, Yuichiro Somiya, Etsuko Kumamoto, Yoichi Oyama
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Aegagropila linnaei is a freshwater green alga, which at one time was distributed widely in the northern hemisphere. The aggregate often forms beautiful spherical shapes known as “lake balls” or “Marimo”. The population of Marimo has
Externí odkaz:
https://doaj.org/article/4d7e9de27d39462d836cfd6c3e11fc12
Autor:
Bing Xiong, Shinichiro Yano, Katsuaki Komai, Naoki Saito, Hiroto Komori, Baixin Chi, Lin Hao, Keisuke Nakayama
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
Shallow coastal waters (SCWs) have attracted wide attention in recent years due to their strong carbon sequestration capacity. However, the complex carbon dioxide (CO2) dynamics in the water column makes it difficult to estimate the air–water CO2 f
Externí odkaz:
https://doaj.org/article/fc0508e8f3f04a2aad5451df094a075c
Effect of dissolved oxygen on methane production from bottom sediment in a eutrophic stratified lake
Publikováno v:
Journal of Environmental Sciences. 125:61-72
Clarifying the role of sulfate and dissolved oxygen (DO) in methane production may allow for precise and accurate modeling of methane emissions in eutrophic lakes. We conducted field observations of sulfate, methane, and DO concentrations in Lake Aba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dea153ec0a83633503dc57347cbef8f
https://doi.org/10.1016/j.jes.2022.01.025
https://doi.org/10.1016/j.jes.2022.01.025
Autor:
Bing Xiong, Naoki Saito, Hiroto Komori, Shinichiro Yano, Keisuke Nakayama, Katsuaki Komai, Hiroshi Yajima
Publikováno v:
18th Annual Meeting of the Asia Oceania Geosciences Society.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23063bd0160da7afcc40249d173c37b4
https://doi.org/10.1142/9789811260100_0032
https://doi.org/10.1142/9789811260100_0032
Empirical Approach for Modeling of Partition Coefficient on Lead Concentrations in Riverine Sediment
Publikováno v:
International Journal of Environmental Science and Development, Vol 11, Iss 7, Pp 352-357 (2020)
Since a large part of heavy metals input in aquatic system accumulates in sediment, their concentrations in sediment are regarded as an important indicator of the heavy metal pollution of aquatic environment. The partition coefficient (Kd) is an empi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1096662a2e05bff5f641cf28c9cb4891
http://www.ijesd.org/show-156-1771-1.html
http://www.ijesd.org/show-156-1771-1.html
Publikováno v:
Coastal Engineering Journal. 62(2):159-169
This study aims to develop a new wave equation model by modifying the Fully-nonlinear and strongly-Dispersive Surface wave (FDS) equations. The modification was performed by applying a new expansion in a series of the vertical coordinate, zμ, to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::335f082aa42d67fe0de542d8ab1211ac
http://www.lib.kobe-u.ac.jp/handle_kernel/90007549
http://www.lib.kobe-u.ac.jp/handle_kernel/90007549
Publikováno v:
Hydrological Research Letters. 14(2):75-80
In Kushiro River basin, inundation is likely to occur due to heavy rain, since the river-bed slope is very gentle in the downstream portion, which has natural levees. Consequently, in past floods, river discharge was observed to increase slowly and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::123dd524178f36eb065fdb0ff3941b8a
http://www.lib.kobe-u.ac.jp/handle_kernel/90007868
http://www.lib.kobe-u.ac.jp/handle_kernel/90007868