Journal of Japan Society on Water Environment最新文献_第8页

Relationship between Essential Fatty Acid Composition of Sediments and Species Richness of Benthic Animals in Paddy Field Ecosystems 稻田生态系统沉积物必需脂肪酸组成与底栖动物物种丰富度的关系

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.17

Yukio Osada, Megumu Fujibayashi, C. Maruo, Shinji Takahashi, Nobuyuki Tanaka, O. Nishimura

引用次数: 1

A Study of Why the Number of Coliform Bacteria Did Not Decrease in Higashi-Yokobori River—Dotonbori River Despite the Completion of the New Stormwater Storage Pipe “Heisei no Taiko Gesui” 东-横取河-道顿堀河在新蓄洪管道“平成-大肠菌群”建成后大肠菌群数量未减少的原因研究

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.189

Akira Oshima, M. Kitano

{"title":"A Study of Why the Number of Coliform Bacteria Did Not Decrease in Higashi-Yokobori River—Dotonbori River Despite the Completion of the New Stormwater Storage Pipe “Heisei no Taiko Gesui”","authors":"Akira Oshima, M. Kitano","doi":"10.2965/jswe.43.189","DOIUrl":"https://doi.org/10.2965/jswe.43.189","url":null,"abstract":"Sewer stormwater overflow, one of the causes of water pollution in Higashi-Yokobori River–Dotonbori River that flow through central Osaka, has been stored in a rainwater storage pipe called “ Heisei no Taiko Gesui ” since April 2015, but the number of coliform bacteria in both rivers did not decrease significantly. If the pipe is working, the number of coliform bacteria at a downstream point should depend on the number at the upstream point, flowing time, and water temperature. Thus, the decay rates of coliform bacteria were determined experimentally, and the predicted numbers of coliform bacteria at the downstream point were compared with the expected values obtained by the Monte Carlo method. The predicted values tended to be underestimated because the obtained decay rates did not reflect the effects of sunlight and other factors. However, the differences between the expected and predicted values after completion become close regardless of the weather, indicating that the pipe is functioning. It was considered that the number of coliform bacteria has not declined in both rivers because the increased load from the upstream cancelled the reduction effect of the pipe.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88159791","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

Analyzing Annual Newsletters of Local Association for Protection of Waga River: Water Quality Monitoring for Closed Mines and Long-term Changes in Related Topics in Newsletters 分析当地瓦加河保护协会的年度通讯:关闭矿山的水质监测和通讯中相关主题的长期变化

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.183

Y. Shibata, Y. Iwasaki, Shion Takemura, T. Yasutaka, Toru Takahashi, H. Matsuda

{"title":"Analyzing Annual Newsletters of Local Association for Protection of Waga River: Water Quality Monitoring for Closed Mines and Long-term Changes in Related Topics in Newsletters","authors":"Y. Shibata, Y. Iwasaki, Shion Takemura, T. Yasutaka, Toru Takahashi, H. Matsuda","doi":"10.2965/jswe.43.183","DOIUrl":"https://doi.org/10.2965/jswe.43.183","url":null,"abstract":"A local association, “Wagagawa no seiryu wo mamoru kai” (The Association for Protection of Clean Water of the Waga River), was established by diverse stakeholders to protect the “clean” Waga River in 1972. As a major activity, the association has been monitoring the water quality (pH and concentrations of Cu, Zn, Cd, Pb, and As) of discharges from closed mines and downstream river sites, and reporting the results in their annual newsletter. To understand how information should be disclosed, it is worth noting that all the monitoring results, including the exceedance of mine discharge standards of the above-mentioned metals, have been made public and discussed in the newsletters. The analysis of the text of the annual newsletters published in 1972-2019 showed long-term primary changes in topics, that is, from (1) initial concern about general environmental pollution to (2) water quality monitoring and measures for preventing environmental pollution by closed mines to (3) the protection of natural environments including aquatic organisms. Our results would contribute to further analysis and discussion of the activities of this association to consider purpose-driven flexible environmental management in abandoned and closed mines in Japan.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87162513","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

Field Test of Ultraviolet Light-Emitting Diode (UV-LED) Apparatuses as an Option of Decentralized Water Treatment Technologies 紫外发光二极管(UV-LED)装置作为分散式水处理技术的一种选择的现场试验

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.119

K. Oguma, S. Watanabe

{"title":"Field Test of Ultraviolet Light-Emitting Diode (UV-LED) Apparatuses as an Option of Decentralized Water Treatment Technologies","authors":"K. Oguma, S. Watanabe","doi":"10.2965/jswe.43.119","DOIUrl":"https://doi.org/10.2965/jswe.43.119","url":null,"abstract":"Assuming application in areas with difficulties in installing, maintaining and operating large-scale water supply systems, the effectiveness of decentralized systems was examined by a one-year field test of disinfection apparatuses equipped with ultraviolet light-emitting diodes (UV-LED) at a faucet supplying untreated water from a mountain stream. The untreated water was sporadically positive with Escherichia coli and had a high heterotrophic plate count (HPC) of bacteria exceeding the target value of drinking water, indicating the need of disinfection process for potable use. In UV-LED treated water, both the concentration and the positive ratio of bacteria decreased, and the maximum concentration of positive samples for E. coli, total coliforms, standard plate count and HPC were 0.5, 1.0, 6.0 and 485 CFU mL, respectively. One model of the UV-LED apparatus achieved all-negative detection of E. coli throughout the one-year test period. No apparatus showed any notable trend of performance deterioration for HPC inactivation with operation time, and scale formation was not apparent inside the body of the apparatuses after the test. This study shows the potential of UV-LED apparatuses as an option of decentralized water treatment technologies.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85220168","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: 2

Source and Decomposition of Organic Matter in the Estuary of Yodo River 游渡河河口有机质来源及分解

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.87

Kaho Watanabe, S. Kobayashi, Masaki Fuchi, S. Asaoka, M. Hayashi

引用次数: 0

Treatment Performance of Water Purification Unit for Reclaimed Wastewater of Independent Toilet 净水装置对独立卫生间再生废水的处理性能

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.69

R. Yokote, T. Taniguchi, A. Hashimoto, K. Nakano

引用次数: 0

Effluent Load at an Irrigation and Drainage Pump Station, Originating from Paddy Fields in the Inbanuma Basin 灌溉和排水泵站的污水负荷，源自Inbanuma流域的稻田

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.133

Satoko Yokoyama, Takahiro Tannzawa, T. Hoshino, M. Mayuzumi, Katsumasa Hanno

引用次数: 0

GIS Analysis of Eighteen-year Trend in Land Use, Runoff, and Nonpoint Load Characteristics in the Lake Biwa–Yodo River Basin 琵琶湖-悠悠河流域18年土地利用、径流和非点源负荷特征的GIS分析

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.141

K. Wada, Masahisa Nakamura, Keisuke Sato, H. Tsuno, Shinya Fukuju

{"title":"GIS Analysis of Eighteen-year Trend in Land Use, Runoff, and Nonpoint Load Characteristics in the Lake Biwa–Yodo River Basin","authors":"K. Wada, Masahisa Nakamura, Keisuke Sato, H. Tsuno, Shinya Fukuju","doi":"10.2965/jswe.43.141","DOIUrl":"https://doi.org/10.2965/jswe.43.141","url":null,"abstract":"Making use of relevant Geographic Information System (GIS) data, an attempt was made to analyze the changes in the magnitude and spatial distribution of the land-based sources of nonpoint pollution loads for the entire Lake Biwa– Yodo River Basin over the 18-year period between 1991 and 2009. Specifically, the magnitudes per unit area of the runoff coefficient and of the COD, T-N and T-P pollutant loads, respectively, were computed and displayed as GIS visual images. The resulting GIS outputs indicate that the runoff coefficient increased along the riparian zones of rivers and around the lakeshore in the middle and lower basin regions, except for the mountainous regions. This implies that the pollutants flow directly into the immediately adjacent receiving waterbodies. Also, the trends of water pollutants were found to be affected by the unit load. The runoff coefficient and the COD loads were related with the progress of urbanization, indicating that the increase and decrease in T-N and T-P pollutant loads were caused by the conversion of land mainly from paddy agriculture to other agricultural purposes. In conclusion, it was confirmed that the results displayed in the form of GIS outputs are useful not only for numerical assessment but also for the assessment of spatial distributions.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"25 1","pages":"141-152"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83030836","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: 1

Minimum Nutrient Concentrations for Sustaining Marine Ecosystem Productivity: Measurement during in situ Growth Experiments of Bivalve and Sessile Organisms 维持海洋生态系统生产力的最低营养浓度:双壳类和无柄生物原位生长实验期间的测量

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.175

T. Fujiwara, K. Higuchi, T. Fujii

引用次数: 3

Analysis Method for Total Nitrogen in Chlorinated Wastewater Containing Ammonium Nitrogen from Sewage Treatment Plant 污水处理厂含铵氮氯化废水中总氮的分析方法

Journal of Japan Society on Water Environment Pub Date : 2020-01-01 DOI: 10.2965/jswe.43.35

Manabu Kashiwabara, K. Hata, Masaya Matsuki, Takaoki Koga, Toyokazu Koga, Shusaku Hirakawa, Y. Kurokawa, T. Miyawaki, N. Shimizu, Gensei Matsumoto, Yuko Ishibashi, H. Yamanishi

{"title":"Analysis Method for Total Nitrogen in Chlorinated Wastewater Containing Ammonium Nitrogen from Sewage Treatment Plant","authors":"Manabu Kashiwabara, K. Hata, Masaya Matsuki, Takaoki Koga, Toyokazu Koga, Shusaku Hirakawa, Y. Kurokawa, T. Miyawaki, N. Shimizu, Gensei Matsumoto, Yuko Ishibashi, H. Yamanishi","doi":"10.2965/jswe.43.35","DOIUrl":"https://doi.org/10.2965/jswe.43.35","url":null,"abstract":"The total nitrogen concentration in chlorinated wastewater from a sewage treatment plant included a large amount of ammonium nitrogen as determined by a measurement method established by the Water Pollution Prevention Act, but it was less than the concentration of dissolved inorganic nitrogen. The total nitrogen concentration may have been underestimated because some of the chloramines in the sample changed to nitrogen gas or nitrous oxide gas under alkaline conditions. Therefore, we evaluated a novel pretreatment method for total nitrogen analysis. The recovery rate of total nitrogen in a sample including 1 mg L -1 ammonium nitrogen and 1 mg L -1 available chlorine from sodium hypochlorite was enhanced to 98% by the addition of 50 mmol L -1 sodium sulfite solution, which accounted for at least 0.4 vol% of the sample. Additionally, a recovery test was carried out with some real samples. The recovery rates of total nitrogen in wastewater from the sewage treatment plant and in water from the environment around the plant were 100-104% after the addition of 50 mmol L -1 sodium sulfite solution.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73352889","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: 1