Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Kiyoshi Takikawa"'
Autor:
Kiyoshi Takikawa, Tatsuya Masuda, Tran Thanh Liem, Takuro Niidome, Mitsuaki Nakano, Shigeru Morimura, Hiroto Ohta
Publikováno v:
The Journal of Experimental Life Sciences. 6:63-70
To provide a general overview of the microbial communities in environmentally conserved estuaries, the top 5 cm of sediment was sampled from the sandy estuary of the Shirakawa River and from the muddy estuary of the Midorikawa River. Higher amounts o
Autor:
Kiyoshi Takikawa, Yaser Nikpeyman, Kimpei Ichiyanagi, Takahiro Hosono, Jun Shimada, Heejun Yang, Masahiko Ono
Publikováno v:
Environmental Earth Sciences. 78
Submarine groundwater discharge (SGD) is a process through which groundwater and solutes are transferred from coastal aquifers into the oceans. Generally, the SGD is composed of two basic components: (1) fresh groundwater, FSGD; and (2) recirculated
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry. 307:2123-2132
A towing method using 222Rn can detect SGD signals in coastal areas. This study aims to evaluate the impact of topography and hydrology on SGD spatial distribution and the estimation of SGD patches along the coastlines. For this, we tried to determin
Autor:
Kiyoshi Takikawa, Kimpei Ichiyanagi, Takahiro Hosono, Jun Shimada, N. Ono, Heejun Yang, Yaser Nikpeyman
Publikováno v:
Proceedings of the International Association of Hydrological Sciences. 365:49-54
Submarine Groundwater Discharge (SGD), as a way through which solutes and nutrients travel from terrestrial areas towards coastal areas, is part of the hydrological cycle. Various methods are used to locate SGD at different scales. Among them, 222Rn
Autor:
Haruhiko Nakata, Kiriko Uehara, Kiyoshi Takikawa, Takashi Miyawaki, Yuta Goto, Miki Fukumura, Hideyuki Shimasaki
Publikováno v:
Ecotoxicology and Environmental Safety. 99:61-68
Polycyclic aromatic hydrocarbons (PAHs) were analyzed in oysters collected from 18 stations in the Yatsushiro Sea, western Japan. PAHs were detected in all samples analyzed, and the highest concentration (mean 230 ng/g wet weight) was found in oyster
Autor:
Yukihide Shimasaki, Kiyoshi Takikawa, Yoshiyuki Takino, Keisuke Mori, Izumi Sakamoto, Koichi Yakita, Kazumi Akimoto, Takaomi Hokamura
Publikováno v:
Procedia Environmental Sciences. 18:174-181
The purposes of this study are to understand mercury accumulation and diffusion based on topographic, sedimentologic, and biologic information obtained by acoustic equipment and an ROV after dredging in Minamata Bay and Yatsushiro Sea. Differences in
Autor:
Kiyoshi Takikawa, Ryusuke Hashimura
Publikováno v:
APCBEE Procedia. 1:272-278
Due to the storm surge and wind waves, Typhoon 9918 caused enormous damage to maritime structures. In this paper, the Improved Central Pressure (CP) Method is used to estimate the damage level of maritime structures along the coast caused by a typhoo
Autor:
Kiyoshi Takikawa, Ryusuke Hashimura
Publikováno v:
International Journal of Environmental Science and Development. :146-151
Autor:
Koichi, Yakita, Kiyoshi, Takikawa, Kazumi, Akimoto, Tatsuya, Masuda, Kentaro, Morimoto, Keisuke, Mori, Hideyuki, Shimasaki
Publikováno v:
熊本大学工学部技術部年次報告集. 2011:141-146
八代海域で採集した試料を対象に、海域底泥表層の硫化物濃度を簡便・効率的に推定する手法について、土色計およびデジタルカメラ画像のマンセル、L*a*b*, HSV等の表色系の色彩データ
Publikováno v:
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research). 67:150-169
In recent years, the Ariake Sea environment has become severely degraded, resulting in changes in biota, a marked overall decrease in the number of species, frequent outbreaks of red tides, and the deterioration of water quality and the sediment envi