Journal of Japan Society on Water Environment最新文献_第4页

Calculation of Decay and Shedding Rates of Environmental DNA in Portunus pelagicus (Linnaeus, 1758) by Rearing Experiments 用饲养实验计算鲈鱼(Linnaeus, 1758)环境DNA的衰变和脱落率

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.223

Retori Hiraoka, Tetsu Ichikawa, K. Imao, Tomoki Miyamukai, T. Takabe, Yoshito Tanaka, Teruaki Suzuki

引用次数: 0

Evaluation of Direct Effect of Nitric Oxide on Nitrous Oxide Production by Ammonia-oxidizing Organisms 一氧化氮对氨氧化生物生产氧化亚氮直接影响的评价

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.107

Toshiaki Saito, Taishi Akagi, Daichi Fujii, S. Konuma, Y. Yoshida

引用次数: 0

Evaluation of Fecal Contamination in Lake Biwa and Yodogawa River Basin by Monitoring Genetic and Chemical Markers Biwa湖和yodoawa河流域粪便污染的遗传和化学标记监测

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.193

Hiroyuki Takino, T. Miura, K. Kosaka, M. Akiba

引用次数: 1

Comparison between Polar Organic Chemical Integrative Sampler (POCIS) and Grab Samples to Estimate Time-Weighted Average Concentrations of Paddy-Use Pesticide Residue in Stream Water 极性有机化学综合采样器(POCIS)与抓取样本估算水稻田农药残留时间加权平均浓度的比较

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.41

M. Sudo, Masato Kajihara, K. Iwama

{"title":"Comparison between Polar Organic Chemical Integrative Sampler (POCIS) and Grab Samples to Estimate Time-Weighted Average Concentrations of Paddy-Use Pesticide Residue in Stream Water","authors":"M. Sudo, Masato Kajihara, K. Iwama","doi":"10.2965/jswe.45.41","DOIUrl":"https://doi.org/10.2965/jswe.45.41","url":null,"abstract":"In this study, the application of the polar organic chemical integrative sampler (POCIS) for the time-weighted average concentration (TWAC) of paddy-use pesticides in environmental water was evaluated. Two herbicides and one fungicide were selected and investigated by deploying POCIS and high-frequency grab sampling (more than two times per day) in three paddy drainage canals (2.8–70 ha) and one river in the Lake Biwa basin for 7–21 day periods. TWACs determined by POCIS and by high-frequency grab samples showed good agreement, and 11 of 14 datasets (79% of all datasets) were within the range of 0.5–2.0-fold difference. To generate estimates of TWAC at different sampling intervals, the high-frequency grab sampling data were subsampled at intervals of 1, 2, 3, 4, and 7days. On the basis of the comparison of TWACs between POCIS and different grab sampling intervals, it is considered that the sampling interval that yields equivalent TWACs to those of POCIS was more than once a week in datasets with low CVs of pesticide concentration (CV ≦ 100%),but more than three day intervals in databases with high CVs.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86869092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compiling Physicochemical Characteristics of Water Quality Monitoring Sites (Environmental Reference Points) in Japanese Rivers and Site Grouping 日本河流水质监测点(环境参照点)理化特征的编制与站点分组

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.231

Y. Iwasaki, Yuta Kobayashi, Tomomi Suemori, Kazutaka M. Takeshita, M. Ryo

引用次数: 0

Comparison of Quantification Methods and Study on Escherichia coli and Coliforms in Yamato River 大和河中大肠杆菌和大肠菌群定量方法的比较与研究

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.29

Katsushige Uranishi, Yosuke Uranishi, Mayumi Tsujimoto, Jirou Shiroyama

{"title":"Comparison of Quantification Methods and Study on Escherichia coli and Coliforms in Yamato River","authors":"Katsushige Uranishi, Yosuke Uranishi, Mayumi Tsujimoto, Jirou Shiroyama","doi":"10.2965/jswe.45.29","DOIUrl":"https://doi.org/10.2965/jswe.45.29","url":null,"abstract":"An environmental standard on the number of coliforms in public rivers was set in 1970 to indicate fecal contamination, but its low indexability has been a problem. In this study, we investigated the usefulness of the hydrophobic gridded membrane filter (HGMF) method using CHROMagar-ECC nutrient agar and the Colilert method for the simultaneous enumeration of coliform bacteria and coliforms, in addition to the prescribed method based on notification No.94 in 2011 of the Ministry of the Environment that can only detect coliform bacteria. From the results of the survey in the Yamato River system, we found that the three methods showed a certain consistency of results, and that the HGMF and Colilert methods were capable of identifying the sites with high contamination levels which could not be determined from coliform counts alone. We also verified how the accuracy of a new environmental standard would change when the current environmental standard is revised from the coliform group count to the Escherichia coli count, and we found that many points on effectiveness that had not been realized with the current standard are expected to be realized after the standard after the revision.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83027266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Nutrient Supply from Basin Sewerage on the Presence of Clam, Ruditapes philippinarum, at the Mouth of Toyogawa River in Mikawa Bay 盆地污水营养盐供给对三川湾丰川河口蛤类存在的影响

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.181

S. Kamohara, Manami Yuguchi, Kiyo Kurita, Teruaki Suzuki

引用次数: 0

Quantification of Floating Algae in a Small Reservoir Using a Multicopter 用多旋翼机定量测定小型水库中的浮藻

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.75

H. Kumagai, Hiroki Iyooka, Shusaku Hirakawa, Yuko Ishibashi, Ryoichi Watanabe

{"title":"Quantification of Floating Algae in a Small Reservoir Using a Multicopter","authors":"H. Kumagai, Hiroki Iyooka, Shusaku Hirakawa, Yuko Ishibashi, Ryoichi Watanabe","doi":"10.2965/jswe.45.75","DOIUrl":"https://doi.org/10.2965/jswe.45.75","url":null,"abstract":"The landscape of a small pond in Fukuoka prefecture has been ruined by floating algae. Basic information, such as the type of algae, location of occurrence, and the amount of generated floating algae, was required to take action. In this study, we identified the floating algae by polarizing microscope observation and microbial community analysis. Additionally, we conducted aerial investigations using a multicopter equipped with a visual and near-infrared camera, and we quantified floating algae areas using images obtained from aerial observation. The results revealed that the floating algae were primarily made up of filamentous cyanobacteria from the family Pseudanabaenaceae. They mainly grow in the shallow area of the pond and peel off from the shallow bottom of the pond because of proliferation-related bubbles in summer. In addition, there was a relationship between the increase and decrease in algae carbon calculated using water temperature and solar radiation and the fluctuation in aerially observed algae area, suggesting that measures to limit solar radiation may be effective as a means of controlling algae proliferation.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87346580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Method of Calculating UV Dose Distributions Using Dye Microcapsules and Applying Lognormal Distributions to Their UV-Sensitive Properties 染料微胶囊紫外剂量分布计算方法的发展及对数正态分布对其紫外敏感性的影响

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.125

Kenichiro Deguchi, Kazutaka Horie, Saeko Kikuchi, Yasuhiko Nagasaka, N. Kamiko

引用次数: 0

Recent Progress in Cutting-edge Monitoring Tools for Microbiomes in Engineered Systems 工程系统中微生物组监测工具的最新进展

Journal of Japan Society on Water Environment Pub Date : 2022-01-01 DOI: 10.2965/jswe.45.91

A. Terada, T. Hori, K. Kubota, F. Kurisu, I. Kasuga, T. Kindaichi, Tsukasa Ito

引用次数: 0